possible change of ship design including engine room about ... · fuel injection timing/atomizer...
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Possible Change of Ship Design Including Engine Room about Emissions of NOx and SOx
Masaki OhtsuMitsui Engineering & Shipbuilding Co., Ltd.
February 28, 2007
Introduction of Mitsui
- 3rd position in production of low speed diesel
Hyundai 7.7 million bhp
Doosan 6.3 million bhp (2006)
Mitsui 3.8 million bhp
- 80 years history of B&W low speed engines
- Low profile in medium speed diesel
- Factory located in Tamano, Okayama-pref.
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MitsuiOkayama Pref., Tamano City
Location of Mitsui
Recently Extended Factory
Index- NOx Reduction Methods
Fuel Injection Timing/Atomizer Choice
Electronically Controlled Injection
Use of Water / EGR
SCR
- SOx Reduction Methods
Low sulphur fuel
Scrubber
- PM Reduction
- CO2 Reduction
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NOx Reduction Methods- Fuel Injection Timing / Atomizer Choice
ME engine can control injection pattern/timing
Immediate mode change is possible
Slide type Fuel Valve 12K98ME
Conventional FV Slide Valve
NOx Reduction Methods- Use of Water
Sea water?---EGR
Sea waterReduced effect at lower scavenging air temperature
---SAM
Fresh water---Water Injection
Fresh waterWater separation at engine stop
Some cases for land use
Water Emulsion
Water SourceLow LoadExperience
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Fuel System with Water Emulsion
NOx Reduction Methods- Use of Water
NOx Reduction Methods- Use of Water
SW mist catcher
Box for FW1stage
Air Cooler with Water Mist Catcher
Sea Water Inlet
Sea Water Outlet
FW Stage2 Outlet
FW Stage2 Inlet
Turbocharger
FW Stage1 InletFW Stage1 Outlet
SAM = Scavenging Air Moisturing
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Sea Water Stage
NOx Reduction Methods
Air flow straightener
Twin pass water separation stage
Twin pass water separation stage
SW spray line and nozzle
Return from intermediate FW system
Filter
Alarm
Floatation type water outlet valve
SW inlet
SW return buffer tank
SW spray pumps
SW valves Dump
p
p
1
P P
P
P
Fresh Water 1 Stage
NOx Reduction Methods
Single pass water Spray separators
Floatation type water outlet valve
Intermediate FW holding tank
Spray pumps
Surplus dump valve
To SW pumps
Return from clean FW systemIntermediate FW spray nozzles
Filter
Dump
Alarm
p
NaClp
t
P P
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Fresh Water 2 Stage
NOx Reduction Methods
Clean FW spray line and nozzles
Surplus FW dump valve
To intermediate FW pumps
Clean FW holding tankFW
pumps
Floatation type water outlet valve
Modified standard water mist separation system
Air coolerFilter Alarm
Dumpp
p
t
NaCl
Simple EGRHot exhaustgas inlet
Freshwaterinjectors
Cold exhaustgas outlet
Freshwaterdrain
2nd stageFlow change cyclonewater separator
1st stageFlow change cyclonewater separator
Seawaterdrain
Seawaterinjector
NOx Reduction Methods
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Test Application on 4T50ME-X
Diesel engine
Line for simple EGR
Line for simple EGR
Exhaustgasscrubber
Non return valve
WMC
WMC
Spray
Spray SW
FWWMC
WMC
SW
FWWMC
Spray
Spray
EGRblower
Auxiliaryblower
CoolerNo. 1 +No. 2
SW
NOx Reduction Methods
NOx Reduction Methods- SCR
Big Installation Work
Reactor before T/C
High sulphur no good
Supply of NH3 or Urea
Dynamic Response ?
Low load performance ?
Example of actual installation for S35MC
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- Low Sulphur Fuel
SOx Emission Control Area (SECA) has been started
High/Low sulphur fuel tanks to be provided.
Careful change over is necessary.
Corresponding change of cylinder oil maybe necessary
SOx Reduction Methods
Freshwater
Seawater
Cooling water
Clean brine
Sludge outWastepump
Sludgetank
Recirculating pump
Supply pump
Water supply / Cooling water / Water brineCirculating waterSludge
ScrubberEcoSilencer
Hot exhaustgas in
Exhaustgas out
- Scrubber
SOx Reduction Methods
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- Improvement of Fuel Injection
Slide type Fuel Valve
ME engine or Common Rail
- Reduction of Cylinder Oil Dosage
Alpha Lubricator
PM Reduction Methods
Higher injection pressure at low load
Retrofit 164 engines
Production at Mitsui
- Turbo Generator
Higher Exhaust Gas Temp. (TES)
- TCS
Utilization of Higher Turbocharger Efficiency
CO2 Reduction Methods
About 5% more
About 3~4% more
Efficiency of Diesel Engine is already very high
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Turbocharger Efficiency
0 . 50
0 . 55
0 . 60
0 . 65
0 . 70
0 . 75
0 . 80
1 . 0 2 . 0 3 . 0 4 . 0 5 . 0
Pressu re Rat io
Eff
icie
ncy
L in e 1
Line 2
TCA Tu rbocharge rNA Tu rbocharge r
CO2 Reduction Methods
Higher Exhaust Gas Temp.
Excess Energy to be utilized
Heat Balance
TESConventional
Turbo-Generator + TCS
Efficiency ImproveCO2 Reduction Methods
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Turbo Compound System
CO2 Reduction Methods
Exh. Gas turbine
Reduction gear with over speed clutch Steam turbine
Reduction gearbox
Generator, AC alternator
Approx. dimensions refering to a 12K98ME/MC: Length: 10 meters Breadth; 3.5 meters Weight: 58 tons
Power Turbines with Expected max. Output
PTG18 - 355 kWPT based on NR
PTG26 - 1,120 kW
PT16 - 500 kWPT18 - 700 kWPT20 - 1,000 kWPT22 - 1,800 kW
PT44 - 2,300 kWPT55 - 3,200 kWPT66 - 4,500 kW
PT14 - 350 kWPT12 - 250 kW
PTG23 - 590 kW
PT based on TCR
PT based on TCA
CO2 Reduction Methods
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Simple Turbo Compound SystemAlternator asynchronous type Planetary Gear
Power Turbine
CO2 Reduction Methods
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