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Electric Propulsion Systems for Ships
Dr Hiroyasu KIFUNE Associate Prof (Tokyo Univ of Marine Sci and Tech) Lectures Electric Machines Power Electronics Electric Propulsion System for Ships Research Area Power Electronics
Dr Hiroyasu KIFUNE Associate Prof (Tokyo Univ of Marine Sci and Tech) Lectures Electric Machines Power Electronics Electric Propulsion System for Ships Research Area Power Electronics Induction Heating Technologies Saving Energy of Ships
Photo from lthttpwwwnazebizdatabase124category-techgt lthttpwwwmarubishi-htcomcategory1327488htmlgt
Todayrsquos lecture title ishellip
Electric Propulsion Systems for Ships
Overview of Electric Propulsion Ships
Comparison with Auto Motives and Ships
Why Auto motives adopt Electric Propulsion
Advantage and Disadvantage
Reason with kind of Ships
Future view
Agenda
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
Pantagraph
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
Pantagraph
Converted and Controlled
Electric Motor
Data and Photo fromhellip httpwwwchiricomrailwaymappdfsyutoken_rosen_201003pdf httpjawikipediaorgwiki httpwwwasahi-netorjp~eg6f-tkhstetutoei_edohtm
Hybrid car runs combining the power of engine electric motor with battery
Car with Electric Motor
Gasoline Engine
Gear Box Tires
Electric Motor
Battery
Main power supply
Aux power supply
Hybrid car runs combining the power of engine electric motor with battery
EV (Electric Vehicle) runs only battery
Car with Electric Motor
Gear Box Tires
Electric Motor
Battery
Main power supply
Various Electric Propulsion Ships
Battery Boat
Raicho I LOA 10m DW3ton
Passenger 12 Lithium ion battery
Permanent Magnetic Motor
LPG carrier
No10 Izumi Maru Owner NGL
LOA 70m DW1056ton
Cargo LPG (Liquefied Petroleum Gas)
Photo from lthttpwwwnglcojpship8htmlgt
Cement carrier
Photo from lthttpwwwube-indcojpuslshipsship40htmgt
Ko-zan Maru Owner JRTT
Yamaki Transport LOA 160m
DW22000ton Cargo Cement
Oil Tanker
MASTERA Owner SEB Leasing Oy
LOA 252m DW106200ton
Atrantic O
Photo from ltMonthly Ships Dec 2003gt
LNG carrier
Photo from lthttpwwwvisualshipscomProvalyshtmgt
PROVALYS LOA 290m
DW 154400m3
Cruise Passenger Ship
Diamond Princess Owner PampO
LOA 290m GT115800ton
Passenger2674 Photo from lthttpjawikipediaorgwikigt
Oceanographic Ship
CHIKYU
LOA210m
GT 56752ton
Drilling Depth2500m
Photo from lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Dr Hiroyasu KIFUNE Associate Prof (Tokyo Univ of Marine Sci and Tech) Lectures Electric Machines Power Electronics Electric Propulsion System for Ships Research Area Power Electronics
Dr Hiroyasu KIFUNE Associate Prof (Tokyo Univ of Marine Sci and Tech) Lectures Electric Machines Power Electronics Electric Propulsion System for Ships Research Area Power Electronics Induction Heating Technologies Saving Energy of Ships
Photo from lthttpwwwnazebizdatabase124category-techgt lthttpwwwmarubishi-htcomcategory1327488htmlgt
Todayrsquos lecture title ishellip
Electric Propulsion Systems for Ships
Overview of Electric Propulsion Ships
Comparison with Auto Motives and Ships
Why Auto motives adopt Electric Propulsion
Advantage and Disadvantage
Reason with kind of Ships
Future view
Agenda
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
Pantagraph
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
Pantagraph
Converted and Controlled
Electric Motor
Data and Photo fromhellip httpwwwchiricomrailwaymappdfsyutoken_rosen_201003pdf httpjawikipediaorgwiki httpwwwasahi-netorjp~eg6f-tkhstetutoei_edohtm
Hybrid car runs combining the power of engine electric motor with battery
Car with Electric Motor
Gasoline Engine
Gear Box Tires
Electric Motor
Battery
Main power supply
Aux power supply
Hybrid car runs combining the power of engine electric motor with battery
EV (Electric Vehicle) runs only battery
Car with Electric Motor
Gear Box Tires
Electric Motor
Battery
Main power supply
Various Electric Propulsion Ships
Battery Boat
Raicho I LOA 10m DW3ton
Passenger 12 Lithium ion battery
Permanent Magnetic Motor
LPG carrier
No10 Izumi Maru Owner NGL
LOA 70m DW1056ton
Cargo LPG (Liquefied Petroleum Gas)
Photo from lthttpwwwnglcojpship8htmlgt
Cement carrier
Photo from lthttpwwwube-indcojpuslshipsship40htmgt
Ko-zan Maru Owner JRTT
Yamaki Transport LOA 160m
DW22000ton Cargo Cement
Oil Tanker
MASTERA Owner SEB Leasing Oy
LOA 252m DW106200ton
Atrantic O
Photo from ltMonthly Ships Dec 2003gt
LNG carrier
Photo from lthttpwwwvisualshipscomProvalyshtmgt
PROVALYS LOA 290m
DW 154400m3
Cruise Passenger Ship
Diamond Princess Owner PampO
LOA 290m GT115800ton
Passenger2674 Photo from lthttpjawikipediaorgwikigt
Oceanographic Ship
CHIKYU
LOA210m
GT 56752ton
Drilling Depth2500m
Photo from lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Dr Hiroyasu KIFUNE Associate Prof (Tokyo Univ of Marine Sci and Tech) Lectures Electric Machines Power Electronics Electric Propulsion System for Ships Research Area Power Electronics Induction Heating Technologies Saving Energy of Ships
Photo from lthttpwwwnazebizdatabase124category-techgt lthttpwwwmarubishi-htcomcategory1327488htmlgt
Todayrsquos lecture title ishellip
Electric Propulsion Systems for Ships
Overview of Electric Propulsion Ships
Comparison with Auto Motives and Ships
Why Auto motives adopt Electric Propulsion
Advantage and Disadvantage
Reason with kind of Ships
Future view
Agenda
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
Pantagraph
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
Pantagraph
Converted and Controlled
Electric Motor
Data and Photo fromhellip httpwwwchiricomrailwaymappdfsyutoken_rosen_201003pdf httpjawikipediaorgwiki httpwwwasahi-netorjp~eg6f-tkhstetutoei_edohtm
Hybrid car runs combining the power of engine electric motor with battery
Car with Electric Motor
Gasoline Engine
Gear Box Tires
Electric Motor
Battery
Main power supply
Aux power supply
Hybrid car runs combining the power of engine electric motor with battery
EV (Electric Vehicle) runs only battery
Car with Electric Motor
Gear Box Tires
Electric Motor
Battery
Main power supply
Various Electric Propulsion Ships
Battery Boat
Raicho I LOA 10m DW3ton
Passenger 12 Lithium ion battery
Permanent Magnetic Motor
LPG carrier
No10 Izumi Maru Owner NGL
LOA 70m DW1056ton
Cargo LPG (Liquefied Petroleum Gas)
Photo from lthttpwwwnglcojpship8htmlgt
Cement carrier
Photo from lthttpwwwube-indcojpuslshipsship40htmgt
Ko-zan Maru Owner JRTT
Yamaki Transport LOA 160m
DW22000ton Cargo Cement
Oil Tanker
MASTERA Owner SEB Leasing Oy
LOA 252m DW106200ton
Atrantic O
Photo from ltMonthly Ships Dec 2003gt
LNG carrier
Photo from lthttpwwwvisualshipscomProvalyshtmgt
PROVALYS LOA 290m
DW 154400m3
Cruise Passenger Ship
Diamond Princess Owner PampO
LOA 290m GT115800ton
Passenger2674 Photo from lthttpjawikipediaorgwikigt
Oceanographic Ship
CHIKYU
LOA210m
GT 56752ton
Drilling Depth2500m
Photo from lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Todayrsquos lecture title ishellip
Electric Propulsion Systems for Ships
Overview of Electric Propulsion Ships
Comparison with Auto Motives and Ships
Why Auto motives adopt Electric Propulsion
Advantage and Disadvantage
Reason with kind of Ships
Future view
Agenda
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
Pantagraph
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
Pantagraph
Converted and Controlled
Electric Motor
Data and Photo fromhellip httpwwwchiricomrailwaymappdfsyutoken_rosen_201003pdf httpjawikipediaorgwiki httpwwwasahi-netorjp~eg6f-tkhstetutoei_edohtm
Hybrid car runs combining the power of engine electric motor with battery
Car with Electric Motor
Gasoline Engine
Gear Box Tires
Electric Motor
Battery
Main power supply
Aux power supply
Hybrid car runs combining the power of engine electric motor with battery
EV (Electric Vehicle) runs only battery
Car with Electric Motor
Gear Box Tires
Electric Motor
Battery
Main power supply
Various Electric Propulsion Ships
Battery Boat
Raicho I LOA 10m DW3ton
Passenger 12 Lithium ion battery
Permanent Magnetic Motor
LPG carrier
No10 Izumi Maru Owner NGL
LOA 70m DW1056ton
Cargo LPG (Liquefied Petroleum Gas)
Photo from lthttpwwwnglcojpship8htmlgt
Cement carrier
Photo from lthttpwwwube-indcojpuslshipsship40htmgt
Ko-zan Maru Owner JRTT
Yamaki Transport LOA 160m
DW22000ton Cargo Cement
Oil Tanker
MASTERA Owner SEB Leasing Oy
LOA 252m DW106200ton
Atrantic O
Photo from ltMonthly Ships Dec 2003gt
LNG carrier
Photo from lthttpwwwvisualshipscomProvalyshtmgt
PROVALYS LOA 290m
DW 154400m3
Cruise Passenger Ship
Diamond Princess Owner PampO
LOA 290m GT115800ton
Passenger2674 Photo from lthttpjawikipediaorgwikigt
Oceanographic Ship
CHIKYU
LOA210m
GT 56752ton
Drilling Depth2500m
Photo from lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Overview of Electric Propulsion Ships
Comparison with Auto Motives and Ships
Why Auto motives adopt Electric Propulsion
Advantage and Disadvantage
Reason with kind of Ships
Future view
Agenda
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
Pantagraph
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
Pantagraph
Converted and Controlled
Electric Motor
Data and Photo fromhellip httpwwwchiricomrailwaymappdfsyutoken_rosen_201003pdf httpjawikipediaorgwiki httpwwwasahi-netorjp~eg6f-tkhstetutoei_edohtm
Hybrid car runs combining the power of engine electric motor with battery
Car with Electric Motor
Gasoline Engine
Gear Box Tires
Electric Motor
Battery
Main power supply
Aux power supply
Hybrid car runs combining the power of engine electric motor with battery
EV (Electric Vehicle) runs only battery
Car with Electric Motor
Gear Box Tires
Electric Motor
Battery
Main power supply
Various Electric Propulsion Ships
Battery Boat
Raicho I LOA 10m DW3ton
Passenger 12 Lithium ion battery
Permanent Magnetic Motor
LPG carrier
No10 Izumi Maru Owner NGL
LOA 70m DW1056ton
Cargo LPG (Liquefied Petroleum Gas)
Photo from lthttpwwwnglcojpship8htmlgt
Cement carrier
Photo from lthttpwwwube-indcojpuslshipsship40htmgt
Ko-zan Maru Owner JRTT
Yamaki Transport LOA 160m
DW22000ton Cargo Cement
Oil Tanker
MASTERA Owner SEB Leasing Oy
LOA 252m DW106200ton
Atrantic O
Photo from ltMonthly Ships Dec 2003gt
LNG carrier
Photo from lthttpwwwvisualshipscomProvalyshtmgt
PROVALYS LOA 290m
DW 154400m3
Cruise Passenger Ship
Diamond Princess Owner PampO
LOA 290m GT115800ton
Passenger2674 Photo from lthttpjawikipediaorgwikigt
Oceanographic Ship
CHIKYU
LOA210m
GT 56752ton
Drilling Depth2500m
Photo from lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
Pantagraph
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
Pantagraph
Converted and Controlled
Electric Motor
Data and Photo fromhellip httpwwwchiricomrailwaymappdfsyutoken_rosen_201003pdf httpjawikipediaorgwiki httpwwwasahi-netorjp~eg6f-tkhstetutoei_edohtm
Hybrid car runs combining the power of engine electric motor with battery
Car with Electric Motor
Gasoline Engine
Gear Box Tires
Electric Motor
Battery
Main power supply
Aux power supply
Hybrid car runs combining the power of engine electric motor with battery
EV (Electric Vehicle) runs only battery
Car with Electric Motor
Gear Box Tires
Electric Motor
Battery
Main power supply
Various Electric Propulsion Ships
Battery Boat
Raicho I LOA 10m DW3ton
Passenger 12 Lithium ion battery
Permanent Magnetic Motor
LPG carrier
No10 Izumi Maru Owner NGL
LOA 70m DW1056ton
Cargo LPG (Liquefied Petroleum Gas)
Photo from lthttpwwwnglcojpship8htmlgt
Cement carrier
Photo from lthttpwwwube-indcojpuslshipsship40htmgt
Ko-zan Maru Owner JRTT
Yamaki Transport LOA 160m
DW22000ton Cargo Cement
Oil Tanker
MASTERA Owner SEB Leasing Oy
LOA 252m DW106200ton
Atrantic O
Photo from ltMonthly Ships Dec 2003gt
LNG carrier
Photo from lthttpwwwvisualshipscomProvalyshtmgt
PROVALYS LOA 290m
DW 154400m3
Cruise Passenger Ship
Diamond Princess Owner PampO
LOA 290m GT115800ton
Passenger2674 Photo from lthttpjawikipediaorgwikigt
Oceanographic Ship
CHIKYU
LOA210m
GT 56752ton
Drilling Depth2500m
Photo from lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
Pantagraph
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
Pantagraph
Converted and Controlled
Electric Motor
Data and Photo fromhellip httpwwwchiricomrailwaymappdfsyutoken_rosen_201003pdf httpjawikipediaorgwiki httpwwwasahi-netorjp~eg6f-tkhstetutoei_edohtm
Hybrid car runs combining the power of engine electric motor with battery
Car with Electric Motor
Gasoline Engine
Gear Box Tires
Electric Motor
Battery
Main power supply
Aux power supply
Hybrid car runs combining the power of engine electric motor with battery
EV (Electric Vehicle) runs only battery
Car with Electric Motor
Gear Box Tires
Electric Motor
Battery
Main power supply
Various Electric Propulsion Ships
Battery Boat
Raicho I LOA 10m DW3ton
Passenger 12 Lithium ion battery
Permanent Magnetic Motor
LPG carrier
No10 Izumi Maru Owner NGL
LOA 70m DW1056ton
Cargo LPG (Liquefied Petroleum Gas)
Photo from lthttpwwwnglcojpship8htmlgt
Cement carrier
Photo from lthttpwwwube-indcojpuslshipsship40htmgt
Ko-zan Maru Owner JRTT
Yamaki Transport LOA 160m
DW22000ton Cargo Cement
Oil Tanker
MASTERA Owner SEB Leasing Oy
LOA 252m DW106200ton
Atrantic O
Photo from ltMonthly Ships Dec 2003gt
LNG carrier
Photo from lthttpwwwvisualshipscomProvalyshtmgt
PROVALYS LOA 290m
DW 154400m3
Cruise Passenger Ship
Diamond Princess Owner PampO
LOA 290m GT115800ton
Passenger2674 Photo from lthttpjawikipediaorgwikigt
Oceanographic Ship
CHIKYU
LOA210m
GT 56752ton
Drilling Depth2500m
Photo from lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
Pantagraph
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
Pantagraph
Converted and Controlled
Electric Motor
Data and Photo fromhellip httpwwwchiricomrailwaymappdfsyutoken_rosen_201003pdf httpjawikipediaorgwiki httpwwwasahi-netorjp~eg6f-tkhstetutoei_edohtm
Hybrid car runs combining the power of engine electric motor with battery
Car with Electric Motor
Gasoline Engine
Gear Box Tires
Electric Motor
Battery
Main power supply
Aux power supply
Hybrid car runs combining the power of engine electric motor with battery
EV (Electric Vehicle) runs only battery
Car with Electric Motor
Gear Box Tires
Electric Motor
Battery
Main power supply
Various Electric Propulsion Ships
Battery Boat
Raicho I LOA 10m DW3ton
Passenger 12 Lithium ion battery
Permanent Magnetic Motor
LPG carrier
No10 Izumi Maru Owner NGL
LOA 70m DW1056ton
Cargo LPG (Liquefied Petroleum Gas)
Photo from lthttpwwwnglcojpship8htmlgt
Cement carrier
Photo from lthttpwwwube-indcojpuslshipsship40htmgt
Ko-zan Maru Owner JRTT
Yamaki Transport LOA 160m
DW22000ton Cargo Cement
Oil Tanker
MASTERA Owner SEB Leasing Oy
LOA 252m DW106200ton
Atrantic O
Photo from ltMonthly Ships Dec 2003gt
LNG carrier
Photo from lthttpwwwvisualshipscomProvalyshtmgt
PROVALYS LOA 290m
DW 154400m3
Cruise Passenger Ship
Diamond Princess Owner PampO
LOA 290m GT115800ton
Passenger2674 Photo from lthttpjawikipediaorgwikigt
Oceanographic Ship
CHIKYU
LOA210m
GT 56752ton
Drilling Depth2500m
Photo from lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
It is the technology which moves by the power of an electric motor
Maybe the railroad is familiar
What is Electric Propulsion
Pantagraph
Converted and Controlled
Electric Motor
Data and Photo fromhellip httpwwwchiricomrailwaymappdfsyutoken_rosen_201003pdf httpjawikipediaorgwiki httpwwwasahi-netorjp~eg6f-tkhstetutoei_edohtm
Hybrid car runs combining the power of engine electric motor with battery
Car with Electric Motor
Gasoline Engine
Gear Box Tires
Electric Motor
Battery
Main power supply
Aux power supply
Hybrid car runs combining the power of engine electric motor with battery
EV (Electric Vehicle) runs only battery
Car with Electric Motor
Gear Box Tires
Electric Motor
Battery
Main power supply
Various Electric Propulsion Ships
Battery Boat
Raicho I LOA 10m DW3ton
Passenger 12 Lithium ion battery
Permanent Magnetic Motor
LPG carrier
No10 Izumi Maru Owner NGL
LOA 70m DW1056ton
Cargo LPG (Liquefied Petroleum Gas)
Photo from lthttpwwwnglcojpship8htmlgt
Cement carrier
Photo from lthttpwwwube-indcojpuslshipsship40htmgt
Ko-zan Maru Owner JRTT
Yamaki Transport LOA 160m
DW22000ton Cargo Cement
Oil Tanker
MASTERA Owner SEB Leasing Oy
LOA 252m DW106200ton
Atrantic O
Photo from ltMonthly Ships Dec 2003gt
LNG carrier
Photo from lthttpwwwvisualshipscomProvalyshtmgt
PROVALYS LOA 290m
DW 154400m3
Cruise Passenger Ship
Diamond Princess Owner PampO
LOA 290m GT115800ton
Passenger2674 Photo from lthttpjawikipediaorgwikigt
Oceanographic Ship
CHIKYU
LOA210m
GT 56752ton
Drilling Depth2500m
Photo from lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Data and Photo fromhellip httpwwwchiricomrailwaymappdfsyutoken_rosen_201003pdf httpjawikipediaorgwiki httpwwwasahi-netorjp~eg6f-tkhstetutoei_edohtm
Hybrid car runs combining the power of engine electric motor with battery
Car with Electric Motor
Gasoline Engine
Gear Box Tires
Electric Motor
Battery
Main power supply
Aux power supply
Hybrid car runs combining the power of engine electric motor with battery
EV (Electric Vehicle) runs only battery
Car with Electric Motor
Gear Box Tires
Electric Motor
Battery
Main power supply
Various Electric Propulsion Ships
Battery Boat
Raicho I LOA 10m DW3ton
Passenger 12 Lithium ion battery
Permanent Magnetic Motor
LPG carrier
No10 Izumi Maru Owner NGL
LOA 70m DW1056ton
Cargo LPG (Liquefied Petroleum Gas)
Photo from lthttpwwwnglcojpship8htmlgt
Cement carrier
Photo from lthttpwwwube-indcojpuslshipsship40htmgt
Ko-zan Maru Owner JRTT
Yamaki Transport LOA 160m
DW22000ton Cargo Cement
Oil Tanker
MASTERA Owner SEB Leasing Oy
LOA 252m DW106200ton
Atrantic O
Photo from ltMonthly Ships Dec 2003gt
LNG carrier
Photo from lthttpwwwvisualshipscomProvalyshtmgt
PROVALYS LOA 290m
DW 154400m3
Cruise Passenger Ship
Diamond Princess Owner PampO
LOA 290m GT115800ton
Passenger2674 Photo from lthttpjawikipediaorgwikigt
Oceanographic Ship
CHIKYU
LOA210m
GT 56752ton
Drilling Depth2500m
Photo from lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Hybrid car runs combining the power of engine electric motor with battery
Car with Electric Motor
Gasoline Engine
Gear Box Tires
Electric Motor
Battery
Main power supply
Aux power supply
Hybrid car runs combining the power of engine electric motor with battery
EV (Electric Vehicle) runs only battery
Car with Electric Motor
Gear Box Tires
Electric Motor
Battery
Main power supply
Various Electric Propulsion Ships
Battery Boat
Raicho I LOA 10m DW3ton
Passenger 12 Lithium ion battery
Permanent Magnetic Motor
LPG carrier
No10 Izumi Maru Owner NGL
LOA 70m DW1056ton
Cargo LPG (Liquefied Petroleum Gas)
Photo from lthttpwwwnglcojpship8htmlgt
Cement carrier
Photo from lthttpwwwube-indcojpuslshipsship40htmgt
Ko-zan Maru Owner JRTT
Yamaki Transport LOA 160m
DW22000ton Cargo Cement
Oil Tanker
MASTERA Owner SEB Leasing Oy
LOA 252m DW106200ton
Atrantic O
Photo from ltMonthly Ships Dec 2003gt
LNG carrier
Photo from lthttpwwwvisualshipscomProvalyshtmgt
PROVALYS LOA 290m
DW 154400m3
Cruise Passenger Ship
Diamond Princess Owner PampO
LOA 290m GT115800ton
Passenger2674 Photo from lthttpjawikipediaorgwikigt
Oceanographic Ship
CHIKYU
LOA210m
GT 56752ton
Drilling Depth2500m
Photo from lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Hybrid car runs combining the power of engine electric motor with battery
EV (Electric Vehicle) runs only battery
Car with Electric Motor
Gear Box Tires
Electric Motor
Battery
Main power supply
Various Electric Propulsion Ships
Battery Boat
Raicho I LOA 10m DW3ton
Passenger 12 Lithium ion battery
Permanent Magnetic Motor
LPG carrier
No10 Izumi Maru Owner NGL
LOA 70m DW1056ton
Cargo LPG (Liquefied Petroleum Gas)
Photo from lthttpwwwnglcojpship8htmlgt
Cement carrier
Photo from lthttpwwwube-indcojpuslshipsship40htmgt
Ko-zan Maru Owner JRTT
Yamaki Transport LOA 160m
DW22000ton Cargo Cement
Oil Tanker
MASTERA Owner SEB Leasing Oy
LOA 252m DW106200ton
Atrantic O
Photo from ltMonthly Ships Dec 2003gt
LNG carrier
Photo from lthttpwwwvisualshipscomProvalyshtmgt
PROVALYS LOA 290m
DW 154400m3
Cruise Passenger Ship
Diamond Princess Owner PampO
LOA 290m GT115800ton
Passenger2674 Photo from lthttpjawikipediaorgwikigt
Oceanographic Ship
CHIKYU
LOA210m
GT 56752ton
Drilling Depth2500m
Photo from lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Various Electric Propulsion Ships
Battery Boat
Raicho I LOA 10m DW3ton
Passenger 12 Lithium ion battery
Permanent Magnetic Motor
LPG carrier
No10 Izumi Maru Owner NGL
LOA 70m DW1056ton
Cargo LPG (Liquefied Petroleum Gas)
Photo from lthttpwwwnglcojpship8htmlgt
Cement carrier
Photo from lthttpwwwube-indcojpuslshipsship40htmgt
Ko-zan Maru Owner JRTT
Yamaki Transport LOA 160m
DW22000ton Cargo Cement
Oil Tanker
MASTERA Owner SEB Leasing Oy
LOA 252m DW106200ton
Atrantic O
Photo from ltMonthly Ships Dec 2003gt
LNG carrier
Photo from lthttpwwwvisualshipscomProvalyshtmgt
PROVALYS LOA 290m
DW 154400m3
Cruise Passenger Ship
Diamond Princess Owner PampO
LOA 290m GT115800ton
Passenger2674 Photo from lthttpjawikipediaorgwikigt
Oceanographic Ship
CHIKYU
LOA210m
GT 56752ton
Drilling Depth2500m
Photo from lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Battery Boat
Raicho I LOA 10m DW3ton
Passenger 12 Lithium ion battery
Permanent Magnetic Motor
LPG carrier
No10 Izumi Maru Owner NGL
LOA 70m DW1056ton
Cargo LPG (Liquefied Petroleum Gas)
Photo from lthttpwwwnglcojpship8htmlgt
Cement carrier
Photo from lthttpwwwube-indcojpuslshipsship40htmgt
Ko-zan Maru Owner JRTT
Yamaki Transport LOA 160m
DW22000ton Cargo Cement
Oil Tanker
MASTERA Owner SEB Leasing Oy
LOA 252m DW106200ton
Atrantic O
Photo from ltMonthly Ships Dec 2003gt
LNG carrier
Photo from lthttpwwwvisualshipscomProvalyshtmgt
PROVALYS LOA 290m
DW 154400m3
Cruise Passenger Ship
Diamond Princess Owner PampO
LOA 290m GT115800ton
Passenger2674 Photo from lthttpjawikipediaorgwikigt
Oceanographic Ship
CHIKYU
LOA210m
GT 56752ton
Drilling Depth2500m
Photo from lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
LPG carrier
No10 Izumi Maru Owner NGL
LOA 70m DW1056ton
Cargo LPG (Liquefied Petroleum Gas)
Photo from lthttpwwwnglcojpship8htmlgt
Cement carrier
Photo from lthttpwwwube-indcojpuslshipsship40htmgt
Ko-zan Maru Owner JRTT
Yamaki Transport LOA 160m
DW22000ton Cargo Cement
Oil Tanker
MASTERA Owner SEB Leasing Oy
LOA 252m DW106200ton
Atrantic O
Photo from ltMonthly Ships Dec 2003gt
LNG carrier
Photo from lthttpwwwvisualshipscomProvalyshtmgt
PROVALYS LOA 290m
DW 154400m3
Cruise Passenger Ship
Diamond Princess Owner PampO
LOA 290m GT115800ton
Passenger2674 Photo from lthttpjawikipediaorgwikigt
Oceanographic Ship
CHIKYU
LOA210m
GT 56752ton
Drilling Depth2500m
Photo from lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Cement carrier
Photo from lthttpwwwube-indcojpuslshipsship40htmgt
Ko-zan Maru Owner JRTT
Yamaki Transport LOA 160m
DW22000ton Cargo Cement
Oil Tanker
MASTERA Owner SEB Leasing Oy
LOA 252m DW106200ton
Atrantic O
Photo from ltMonthly Ships Dec 2003gt
LNG carrier
Photo from lthttpwwwvisualshipscomProvalyshtmgt
PROVALYS LOA 290m
DW 154400m3
Cruise Passenger Ship
Diamond Princess Owner PampO
LOA 290m GT115800ton
Passenger2674 Photo from lthttpjawikipediaorgwikigt
Oceanographic Ship
CHIKYU
LOA210m
GT 56752ton
Drilling Depth2500m
Photo from lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Oil Tanker
MASTERA Owner SEB Leasing Oy
LOA 252m DW106200ton
Atrantic O
Photo from ltMonthly Ships Dec 2003gt
LNG carrier
Photo from lthttpwwwvisualshipscomProvalyshtmgt
PROVALYS LOA 290m
DW 154400m3
Cruise Passenger Ship
Diamond Princess Owner PampO
LOA 290m GT115800ton
Passenger2674 Photo from lthttpjawikipediaorgwikigt
Oceanographic Ship
CHIKYU
LOA210m
GT 56752ton
Drilling Depth2500m
Photo from lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
LNG carrier
Photo from lthttpwwwvisualshipscomProvalyshtmgt
PROVALYS LOA 290m
DW 154400m3
Cruise Passenger Ship
Diamond Princess Owner PampO
LOA 290m GT115800ton
Passenger2674 Photo from lthttpjawikipediaorgwikigt
Oceanographic Ship
CHIKYU
LOA210m
GT 56752ton
Drilling Depth2500m
Photo from lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Cruise Passenger Ship
Diamond Princess Owner PampO
LOA 290m GT115800ton
Passenger2674 Photo from lthttpjawikipediaorgwikigt
Oceanographic Ship
CHIKYU
LOA210m
GT 56752ton
Drilling Depth2500m
Photo from lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Oceanographic Ship
CHIKYU
LOA210m
GT 56752ton
Drilling Depth2500m
Photo from lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Photo from lthttpwwwoilrig-photoscompicturenumber1865aspgt
FPSO
(Floating Production Storage and Offloading system)
Oil drilling Ship Excavating from 1200m in depth
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Why does it become energy saving if a car uses an electric motor and a battery
Electric Propulsion in Car
Conventional Car
Speed
Power
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Electric Propulsion in Car
Hybrid Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Electric Propulsion in Car
Photo from lthttpwwwhondacojpINSIGHTwebcatalogcolorgt
Speed
Power Motor assisted power
Charging battery
When slowing down the kinetic energy which the body has is collected as electric power
By storing in a battery temporarily this electric power can be again used at the time of the next acceleration
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Electric vehicle is also the same and the body kinetic energy at the time of a slowdown is collected as electric power
Battery is an important key device
Electric Vehicle
Electric Vehicle
Photo from lthttpwwwmitsubishi-motorscojpi-mievcolorindexhtmlgt
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Lithium ion battery is small compared with a lead storage battery
High power
However it is still expensive
Lithium ion Battery
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
No traffic signal no pedestrian
No brake device on the board
Continue running
Hardly slow down
How is ship
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
If acceleration and a slowdown are repeated frequentlyhellip
Kinetic Energy
Weight 100000 ton Speed 8ms
Weight 1 ton Speed 16ms
Kinetic energy 128kJ
Kinetic energy 32GJ
25000 times
Hybrid system using battery is unreal for ships
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Buthellip there are Electric Propulsion Ships
We need to clarify a definition of electric propulsion for ships
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Large amount of battery is needed
Ship is larger than car
Large amount of battery can be boarded
But too expensive
Motivation is different with kind of ships
If it adopts hybrid system with batteryhellip
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Generator system of Conventional Cargo Ships
Photo from lthttpjawikipediaorgwikigt
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Generator system of Conventional Cargo Ships
Electricity demand is small
2 Generators are equipped
Only one set of either is usually operated
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Photo from lthttpjawikipediaorgwikigt
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Main Engine
Propeller
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Configuration of General Cargo Ships
Gen
Gen
Laod A
Laod B
Laod C
440V 60Hz
Laod D
220V110V
Main Engine
Propeller
Electric System Propulsion System
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Very big (24m 15m)
Super heavy (2000 ton)
High Power (60000 kW)
High Efficiency ( over 50 )
Large Diesel Engine for Main Engine
Photo from lthttpwwwmolcojpishinenginepresentindexhtmlgt lthttpwwwmhicojpproductsdetailmitsubishi-wartsila_diesel_enginehtmlgt
Features
Cleaner transport
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Values in kinds of transportation
Cost
Energy Saving
Speed
Convenience
Mass Transportation
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Motor speed can be controlled by the frequency of electric power
Generator outputs constant frequency (60Hz)
Power converter supply suitable frequency and demanded power
Speed Control by frequency
Constant Frequency
60Hz Supply suitable frequency for
control
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Configuration of Electric Propulsion System for Ships
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Harmonic Distortion
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Configuration of Electric Propulsion System for Ships
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Special Transformer for Power converter
Photo from lthttpwwwrishocojpproductproducts3special_useconverterconverterhtmgt
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Comparison with Conventional and Electric Propulsion system
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Advantage and Disadvantage
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Advantage 1 (Free Arrangement)
Generator
Generator
Generator
Generator Generator Generator
Generator
Generator
Generator
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space G
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Advantage 2 (Enhance cargo space)
Engine Room
G
G G
M C Cargo Space
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Advantage 2 (Enhance cargo space)
Engine Room
Cargo Space
G
G G
M C
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
Resistance from sea water
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Advantage 3 (Reduction of resistance from sea water)
Engine Room
G
G G
M
C
Resistance from sea water is reduced
Improvement of vesselrsquos shape
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Main Engine
Gen Engine
Gen Engine
Advantage 4 (Communalization of replacement parts)
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Advantage 4 (Communalization of replacement parts)
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Gen Engine
Gen Engine
Gen Engine
Gen Engine
easy
Advantage 4 (Communalization of replacement parts)
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Advantage 5 (Redundancy)
There is no machine which does not break down
Failure of a machine cannot be prevented thoroughly
Delay of delivery turns to business loss
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Advantage 5 (Redundancy)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Still can GO
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Vibration induced mechanically is large amplitude and low frequency
Vibration frequency is not constant
Screws may loosen by vibration
Slack of screw causes loose connection
Noise is also loud
No technology to remove such a vibration
Advantage 6 (Low vibration and noise)
Conventional Ship
Main Engine
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Engine speed is always constant
Vibration frequency also constant
Tends to deal with
Noise also becomes small
Advantage 6 (Low vibration and noise)
Electric Propulsion Ship
Gen Engine M
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Torque is small in a low engine-speed region
Advantage 7 (Maneuvering)
Torque
Speed
Engine
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Electric motor can output maximum torque in low speed region
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor
Engine
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Electric motor can output maximum torque in low speed region
Electric motor can change over the direction of its revolution
These features provides good maneuvering capability
Advantage 7 (Maneuvering)
Torque
Speed
Electric Motor Electric
Motor
Engine
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Advantage 7 (Maneuvering)
Ship needs to help pushing and pulling by tugboat when she enter and departure port
It takes long time
Can control speed direction and position precisely
Tugboat is necessarily unnecessary
Conventional
Electric Propulsion
Photo from lthttppictrialexblogjp10186697gt
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 1 (Increasing Initial Cost)
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
Friction Friction Friction
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Disadvantage 2 (Decreasing Efficiency)
Main Engine
Intermediate shaft bearing
Thrust bearing
Propeller shaft bearing
Gen
Gen
Laod A
Laod B
Laod C
Laod D
Main Engine
Propeller
100 96 ~ 98
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100 94
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Disadvantage 2 (Decreasing Efficiency)
Gen
Gen
Laod A
Laod B
Laod C
Gen
Gen
Power Converter
Power Converter
Motor
Motor
Generator Engine
Alternator
100
93 85~89 81~86
Power loss is very large
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Disadvantage 3 (Vague Uneasiness)
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Disadvantage 3 (Vague Uneasiness)
Power Converter
Difficult to specify failure parts and trouble causes
Owner willing to adopt
electric propulsion
NO
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
The reasons with kinds of ship
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Case of Large Passenger Ship
Photo from lthttpwwwprincesscomlearnshipsindexhtmlgt lthttpwwwcruiseplanetcojpship_datedt_pr_rubyhtmgt
Various services is provided
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Infrastructures are needed in many facilities for service
Demand electric power is large
Case of Large Passenger Ship
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Case of Large Passenger Ship
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Gen Gen
Gen Gen
Case of Large Passenger Ship
Lots of Generator is needed
Not necessary to divide engine for utility and propulsion
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Gen Gen
Gen Gen
Case of Large Passenger Ship
Low vibration and noise
Large and comfortable living environment
ZZZhellip
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Case of drilling ship
Photo from lthttpwwwecooljpforeign201101diamondo04-1003htmlgt
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Case of drilling ship
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Case of drilling ship
OK
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Case of drilling ship
Snake Ocean current
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Case of drilling ship
Oh NO
Oil leak
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Case of drilling ship
Where am I
GPS Global Positioning System
Position on earth can be calculated
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Case of drilling ship
Azimuth thruster
It can control the direction of thrust force without the rudder
Photo from open document of ABB
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Case of drilling ship
DPS Dynamic Positioning System
Photo from lthttpdokaicojpcablehtmlgt lthttpbloggoonejptaro-xe53a94879e93eb80beaafee34b1797a59gt
Oceanographic research ship
Cable layer
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Case of LNG carrier (Conventional)
LNG Liquefied Natural Gas
Main ingredient is Methane
Liquefied under -161oC
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Case of LNG carrier (Conventional)
BOG Boil Off Gas
Boiler LNG evaporates with heat which enters from outside a tank BOG is burned by a boiler together with heavy fuel oil as fuel
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Case of LNG carrier (Conventional)
Boiler
Steam Turbine
Conventional LNG carrier has a steam turbine plant
High reliability
No vibration and low noise
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Thermal efficiency is low compared with the diesel engine plant
Engineers who have advanced technical knowledge and technology are needed
Case of LNG carrier (Problems to be solved)
Boiler
Steam Turbine
Diesel Engine
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Case of LNG carrier
DFE Dual Fuel Engine
DEE can use BOG as fuel
DFE Gen
Power converter
Electric Motor
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Case of LNG carrier (Unloading)
To harbor
Ballast tank
Unloading Pump
Ballast Pump
Unloading pump and Ballast pump operate simultaneously in order to keep balance
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
There is no advantage introducing an electric propulsion system for tanker
Case of Tanker for Icy Ocean
Photo from lthttpjawikipediaorgwikigt
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Ice breaking capability
Advance and sternway are repeated frequently
High torque is needed in a low speed condition
Case of Tanker for Icy Ocean
Photo from ltMonthly Ships Dec 2003gt
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Torque
Speed
Engine
Case of Tanker for Icy Ocean
Torque
Speed
Electric Motor
Engine torque is not sufficient in low speed
Electric motor output max torque in wide speed range
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Future View of Electric Propulsion Ship
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Si SiC (Power semiconductor)
If SiC is used as a material of power semiconductors the efficiency of the power converter can be improved
Gen
Gen
Power Converter Motor
Converter 60Hz AC DC
Inverter DC
Various frequency AC
Power Converter
Thank you
Thank you