micro gas turbines on mega yachts benet...micro gas turbines on mega yachts 1 rostock university...
TRANSCRIPT
MICRO GAS TURBINES
ON MEGA YACHTS
1
Rostock University
February 2, 2016
Álvaro Francisco Benet Pérez
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What is a micro gas turbine (MGT)
Álvaro Francisco Benet Pérez
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•IMO Tier III Regulations on NOx emissions • New constructions from January 2016
• Selective Catalytic Reduction (SCR) for GenSets
• No adaptation needed for MGT
•Comfort • Low vibration and noise levels
• No Lube Oil
• High maintenance intervals/expected lifetime
Motivation
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Drawbacks (comparison with GenSets)
• 230% Higher Air Demand Efficiency decrease with T > 23ºC Inlet ducts+Air coolers
• 15% Higher Fuel Oil consumption
Use of waste heat
• 50% higher maintenance costs
Batteries
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Feasibility study on Mega Yacht BV80
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Use of waste heat
• Mega yachts spend 90% of time in summer areas
• Up to 25% of total energy for chilled water
• Absorption chiller Use of heat to produce chilled water
Electrical demand is reduced
Overall efficiency increase
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How big the absorption chiller must be
• Chilled water production depends on available heat
• Available heat depends on electrical demand
• Electrical demand varies: Ship condition (navigation, anchoring, harbour service...)
Hour of the day
Owner/guests onboard
• Development of a code to take into account variables
8
Initial
Electrical
balance
MGT
performance
Abs Chiller
model
New electrical
balance Gensets
performance
Gensets
consumption
cost
Cost savings
Power plant
consumption
cost
Selection
Abs Chiller
Percentage
of time
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Code overview
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Gaussian distribution of electrical demand
Initial
Electrical
balance
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Gensets consumption costs
Initial
Electrical
balance
Gensets
performance
Gensets
consumption
cost
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Reduction of electrical demand
Initial
Electrical
balance
Abs Chiller
model
New electrical
balance
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Comparison Gensets vs MGT+Absorption Chiller
Initial
Electrical
balance
MGT
performance
Abs Chiller
model
New electrical
balance Gensets
performance
Gensets
consumption
cost
Cost savings
Power plant
consumption
cost
Percentages of time
Minimum Maximum
Navigation % 0 30
Harbour service % 0 30
Anchoring % 0 40
Harbour in Rest % 50 100
242 Combinations
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Reasonable percentages of operation
Percentage
of time
92% of cases Absorption Chiller 264 kW
selected
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Absorption chiller selection
Initial
Electrical
balance
MGT
performance
Abs Chiller
model
New electrical
balance Gensets
performance
Gensets
consumption
cost
Cost savings
Power plant
consumption
cost
Selection
Abs Chiller
Percentage
of time
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Heat power profile for selected model
Gensets
SCR
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Effect of the selected model
Absorption
Chiller
Overall efficiency 1%
higher than GenSets
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Batteries for bow thruster
• One MGT could be removed if batteries are installed Reduction of total air demand
• MGTs would work 33% more hours per year Reduction in maintenance costs
Decrease of expected life of MGTs from 20 to 15 years
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Lifetime costs of alternatives over 20 years
0
2
4
6
8
10
12
14
16
18
Alternative 1 Alternative 2 Alternative 3 Alternative 4 Alternative 5
Mil
lio
n €
Refit
Maintenance
Consumption
Initial Investment
• Alternative 1: GenSets
• Alternative 2: MGTs
• Alternative 3: MGTs + Absorption chiller
• Alternative 4: MGTs + Batteries
• Alternative 5: MGTs + Absorption chiller + Batteries
14,0
16,6
14,9
17,0
15,3
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Conclusions
• Efficiency of MGT+Absorption Chiller > GenSets
• Extra cost/year < 0.05% of total price of the ship
• Clean Image