1 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for SeagoingVessels
Wärtsilä SwitzerlandApplication Development
Heinrich Schmid
2 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Introduction
Engine designRT-flex electronic engine technology
WHR for reduced emissions
Puls lubrication system
Propulsor designTip rake propeller
Efficiency rudder
Conclusion
3 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Introduction
Engine designRT-flex electronic engine technology
WHR for reduced emissions
Puls lubrication system
Propulsor designTip rake propeller
Efficiency rudder
Conclusion
4 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Efficient Propulsion for Seagoing VesselsTo consume minimum amount of fuel to achieve a definedship speed
To generate minimum emissions such as CO2, NOx, SOx andcombustion particles for a defined vessel speed
Influences:
Ship hull geometry Shipyard
Engine engine design and technology Engine designer
Propulsor design and technology Propulsor designer
A good economy of the vessel must be respected by applyingefficiency improvement concepts
5 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Introduction
Engine designRT-flex electronic engine technology
WHR for reduced emissions
Puls lubrication system
Propulsor designTip rake propeller
Efficiency rudder
Conclusion
6 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with the RT-flex common rail engine
WECS 9520controlsystem
Exhaust valveactuating unit
Fuelinjectors
Exhaust valveactuator
up to ~1000 bar fuel HFO / MDO
200 bar servo oil and control oil
Volumetric fuelinjection control unit
30 bar starting air
Crankangle
sensor
6µ
50µ
7 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with the RT-flex common rail engine
Direct mechanical geardrive
Generates 1000 bar fueloil pressure with highefficiency fuel pumps(jerk type)
Generates 200 bar servooil pressure withreversible oil pumps(axial piston type)
Pumps’ capacityensures redundancy incase of failure
8 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with the RT-flex common rail engine
25 50 75 100 rpm [%]
Wärtsilä Common Rail SystemIn
ject
ion
pres
sure
Free selectable injection pressurefor low NOx emissions, high efficiency and no smoke at all loads
Conventional Injection System
9 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with the RT-flex common rail engine
Val
ve T
imin
g [°
CA]
Free selectable exhaust valve timingfor high efficiency, low NOx level, smokeless operation
Special timing for emergency braking and rapid engine loading possible
Sulzer Common Rail System
Conventional Exhaust Valve Control
close
open
10 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with the RT-flex common rail engine
Reduced NOx emissions through sequential fuel injection mode
11 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with the RT-flex common rail engine
0
5
10
15
20
25
25%load
50%load
75%load
100% load
weightedaverage
bsN
Ox,
g/k
Wh
IMO limit RT-flex tuned for IMO-20%RT-flex IMO-compliant RT-flex tuned for IMO-20%
Low-NOx injection:Sequential injection
Adapted injectionpressure
Adapted injectiontiming
12 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with the RT-flex common rail engineSequential operation of single injection nozzles for superdead slow operation
1-nozzle operation for super-dead-slow operation
smokeless down to 10 to 12% rpm R1
(12rpm for 6RT-flex58T-B)
13 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with the RT-flex common rail engine
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0 10 20 30 40 50 60 70 80 90 100Engine Load [% ]
Filte
r Sm
oke
Num
ber [
FS
N ] HFO
380 cSt 3% sulphur 0.1% ash
Conventional low speed engine
OFF Aux. BlowerON
6RT-flex 58T-B with common rail
Smoke visibility limit
Sulzer 6 RT-flex58T-B MV Gypsum CentennialSmoke measurement on combinator curve during sea trial
Smoke free operation over the entire load range
14 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with the RT-flex common rail engineSmoke free operation over the entire load rangeSmokfree operation means less combustion particles in theexhaust
Cleaner combustion space
Less deposits in turbochargers
Less deposits in exhaust gas boilerLower risk for a boiler fire
Less combustion deposits on deck
15 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with the RT-flex common rail engine
165.2
167.5
166.6165.8
165.4
166.8
169.7
174.0
165.2
163.4163.0163.1163.5
164.6
166.0
164.2
167.6
168.9
166.6165.8
165.3 165.2165.4
165.9166.8 168.2
171.0
162.0163.0164.0165.0166.0167.0168.0169.0170.0171.0172.0173.0174.0175.0
50 55 60 65 70 75 80 85 90 95 100
Engine load (%)
Spec
ific
fuel
con
sum
ptio
n (g
/kW
h)
RT-flex96C"Delta"
RTA96C
RT-flex96C"Standard"
Reduced fuel consumption
16 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with the RT-flex common rail engine
More than 477 RT-flexengines are on order orin service by August2007.
– flex 0 RT-flex50– flex I RT-flex58T-B
RT-flex60C– flex II RT-flex68– flex III RT-flex82C/T– flex IVRT-flex96C
RT-flex84T-D
1’198’000253’000
RT-flex82CRT-flex82T
338
10’985’000RT-flex96C18116‘061‘000RT-flex engines477
823’000RT-flex84T-D28
357’000RT-flex68-B16417’000RT-flex60C25
471’000RT-flex58T-B34
1’557’000RT-flex50152
Total kWRT-flex engineson order or in service
N° of
17 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with the RT-flex common rail engine
Largest RT-flex engine14RT-flex96C, 80’080 kW at 102 rpmShoptest December 2005
Smallest RT-flex engine6RT-flex50, 9’720 kW at 124 rpmShoptest July 2005
18 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with the RT-flex common rail engine
Totally 110 RT-flex engines in service by August 2007
First engine in service since November 2001
12 x RT-flex50
10 x RT-flex58T-B
13 x RT-flex60C
2 x RT-flex68B
5 x RT-flex84T-D
68 x RT-flex96C
More then 800’000 accumulated running hours
“Gypsum Centenial” with 6RT-flex58T, in servicesince January 2001
19 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Introduction
Engine designRT-flex electronic engine technology
WHR for reduced emissions
Puls lubrication system
Conclusion
20 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with Waste Heat Recovery
About 50% of the fuel input energy isnot being put to productive use.
Recovering part of the wasted energyprovides the vessel with:
lower fuel consumption
less emissions
Why Waste Heat Recovery?
21 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with Waste Heat Recovery
The application of a waste heat recoverysystem is threefold:
The operator profits from a lower annual fuel bill
The operator contributes to lower the emission,such as CO2, NOX and SOX.
The operator benefits from an improvedcompetitivity in the freight market
Being Green is a Competitive Edge
22 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with Waste Heat Recovery
Exhaust gaseconomiser
G
Ship service steam
Ship service power
G
G
Aux. Engine
Main Engine
Turbochargers
Aux. Engine
Aux. Engine
G Aux. Engine
23 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with Waste Heat Recovery
Exhaust gaseconomiser
G
Ship service steam
Steamturbine
Ship service power
G
G
G
Aux. Engine
Main Engine
Turbochargers
Aux. Engine
Aux. Engine
G Aux. Engine
24 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with Waste Heat Recovery
Exhaust gaseconomiser
G
Ship service steam
Steamturbine
Ship service power
G
G
GPowerturbine
Aux. Engine
Main Engine
Turbochargers
Aux. Engine
Aux. Engine
G Aux. Engine
25 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with Waste Heat Recovery
Exhaust gaseconomiser
G
Ship service steam
Steamturbine
Ship service power
G
G
G
M/G
Powerturbine
Aux. Engine
Main Engine
Turbochargers
Aux. Engine
Aux. Engine
Shaft motor / generator
Frequency control system
G Aux. Engine
26 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with Waste Heat Recovery
Heat Balance Standard Engine Heat Balance with Heat Recovery
Engine efficiency improvement with heat recovery = 54.9 / 49.3 = 11.4%
Total 54.9%
27 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with Waste Heat Recovery
12RT-flex96C, Delta tuning, Turbogenerator outputDual pressure steam system, 10% P/T gas flow
ambient suction tuning, ISO, average aged engine
23612040
17561540138112221068914780647
63505800
52544823
44004060
37763492
32893085
8711
7840
7010
6363
57815282
48444406
40693732
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
50 55 60 65 70 75 80 85 90 95 100 105Engine load (%)
Turb
ogen
erat
or o
utpu
t(k
We)
Power turbine output (kWe) Steam turbine output (kWe) Total output (kWe)
28 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with Waste Heat Recovery12RT-flex96C - Case StudyDelta tuning, average aged, ISO conditions
12RTA96CMCR = 68'640 kW
Auxiliaryengine
G~Auxiliaryengine
G~Auxiliaryengine
G~
Auxiliaryengine
G~
Annual operating costsMain engine Auxiliary engines
Fuel costsEngine power 58’344 kW 5’350 kWBSFC 166.2 g/kWh 200 g/kWheDaily F.C. MDO 232.7 tons 25.7 tonsDaily F.C. HFO 245.4 tons 27.1 tonsTotal D.F.C 272.5 tonsTotal annual F.C. 18’449’000 $
Maintenance costsSpecific costs 0.7 $/MWh 5.0 $/MWhAnnual costs 312’000 $ 174’000 $Total 486’000 $
Lube oil costsSpecific consumption 1.0 g/kWh 0.6 g/kWhAnnual L.O. cons. 279.2 tons 22.0 tonsAnnual L.O. costs 569’000 $ 33’000 $Total 602’000 $
Total annual operating costs19’537’000 $
Four auxiliary engines, each 3’000 kW
58’344 kW
29 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with Waste Heat Recovery12RT-flex96C - Case StudyDelta tuning, average aged, ISO conditions
Annual operating costsMain engine Heat recovery
Fuel costsEngine power 57’350 kW 0BSFC 166.9 g/kWh 0Daily F.C. MDO 229.7 tons 0Daily F.C. HFO 242.2 tons 0Annual fuel costs 16’395’000 $ 0
Maintenance costsSpecific costs 0.7 $/MWh 0.5 $/MWhAnnual costs 312’000 $ 20’000 $Total 333’000 $
Lube oil costsSpecific consumption 1.0 g/kWh 0Annual L.O. cons. 373.0 tons 0Annual L.O. costs 559’000 $ 0
Total annual operating costs17’287’000 $
12RTA96CMCR = 68'640 kWM~
Heatrecovery
56’769 kW
CSR power= 57’350 kW = 83.6% load
6’196 kWe
Servicepower= 5’150 kWe
1’046 kWe
994 kWm
Service power saving with ambientair supply = 200 kWe
New service power = 5’150 kWe
30 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with Waste Heat Recovery12RT-flex96C - Case StudyDelta tuning, average aged, ISO conditions
Operating cost savings HFO price = 250 $/t, L.O. price = 1’500 $/t, 6’500 hours p.a.
559’000 $92.9 %
602’000 $Total lube oil costs
17’287’000 $88.5 %
19’537’000 $Total operating costs
2’250’000 $Annual savings
333’000 $68.5%
486’000 $Total maintenance costs
16’395’000 $88.9%
18’449’000 $Total fuel costs
Propulsion systemwith heat recovery
Classic propulsionsystem
31 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with Waste Heat Recovery12RT-flex96C - Case StudyDelta tuning, average aged, ISO conditions
Operating cost savings
3’072’000 $
350 $ / tonne
2’661’000 $
300 $ / tonne
3’482’000 $2’250’000 $Annual savings
400 $/t250 $ / tonne
Heavy fuel price (380 cSt)
4’062’000 $3’584’000 $3’105’000 $2’625’000 $Annual savings
14RT-flex96C
32 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with Waste Heat Recovery
Expected investment costs for:Turbogenerating set, consisting of:Multistage dual pressure condensing steam turbine, power turbine, gearbetween power turbine and steam turbine, gear between steam turbine andgenerator, 6.6 kV generator, base frame, valves and controls.
Exhaust gas economiser, consisting of:High pressure evaporator and superheater, low pressure evaporator andsuperheater, LP and HP steam drums, cleaning system.
Shaft motor / generator plant, consisting of:Shaft motor / generator, propulsion converter, propulsion control system,transformers, synchronous condenser.
Total price € 6’000’000.00
12RT-flex96C - Case StudyDelta tuning, average aged, ISO conditions
33 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with Waste Heat Recovery
0
5'000'000
10'000'000
15'000'000
20'000'000
25'000'000
30'000'000
35'000'000
0 5 10 15 20years
Net
pre
sent
val
ue ($
)
250 $/t HFO 300 $/t HFO 350 $/t HFO Investment
12RT-flex96C - Case StudyDelta tuning, average aged, ISO conditions
Expected pay-back time
34 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with Waste Heat Recovery
Turbogenerator with power turbine as manufactured by Peter Brotherhood Ltd.
35 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with Waste Heat Recovery
Typical shaft motor / generator
36 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with Waste Heat Recovery
Length: 367.28 m
Beam: 42.8 m
Deadweight: 115’000 tons
Main engine: 12RT-flex96C68’640 kW
Aux. engines: 3 x 8L323’600 kW each
“Gudrun Maersk”First vessel with a high efficiency Waste Heat Recovery plantIn service since June 2005, totally 6 vessels of this series
37 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Reduced emissions with Waste Heat Recovery
Length: 397.0 m
Beam: 56.0 m
Main engine: 14RT-flex96C80’080 kW
Aux. engines: 5 x 4’140 kW
Reefer containers: 1000 units
“Emma Maersk”Equipped with a high efficiency Waste Heat Recovery plantIn service since September 2006, totally 8 vessels of this series
38 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Introduction
Engine designRT-flex electronic engine technology
WHR for reduced emissions
Puls lubrication system
Conclusion
39 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Electronically controlled Puls cylinder lubricating system
Lower cylinder oil consumption with the new Puls System
40 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Electronically controlled Puls cylinder lubricating system
Working PrincipleNew lubricator pumpElectronically controlled timing with fullflexibility of timing pointElectronically controlled feed rateOil distribution by a series of compact jets,no atomization, no loss of oil in scavengeairno influence of oil temperaturePrecise dosage even for low feed ratesReliable oil quills (simple non return valves)Control of lubricating system fully integratedin RT-flex control system WECS 9520
41 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Electronically controlled Puls cylinder lubricating system
Configuration for:RT-flex96CRT-flex82C/T
8 quills5 oil jets per quillTotal of 40 lubricating pointson the liner surface
42 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Electronically controlled Puls cylinder lubricating system
Pulse Lubrication ensures regular distribution of oil film on liner surface:1 Oil quill2 Groove for jet propagation3 Distributed lube oil
21
3
43 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Electronically controlled Puls cylinder lubricating systemElectronically Controlled Flexible Timing of Lube Oil Injection
Lube oil distributionabove piston to lubricateupper part of liner
Lube oil distribution intopiston ring pack tolubricate piston rings
Lube oil distributionbelow piston tolubricate lower part ofliner
44 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Electronically controlled Puls cylinder lubricating systemArrangement of Pulse Lubricating Module
Control Unit
Pump
Lubricating quill
Short distancebetween pumpand lubricatingquills gives highinjectionprecision
Pressure sensor
45 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Introduction
Engine designRT-flex electronic engine technology
WHR for reduced emissions
Puls lubrication system
Propulsor designTip rake propeller
Efficiency rudder
Conclusion
46 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Propeller efficiency improvement by tip rake
47 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Propeller efficiency improvement by tip rake
Pressure side tip rakeefficiency gain 2-3 %pressure pulses reduction ~10%
48 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Propeller efficiency improvement by tip rake
Curvedtip
49 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Introduction
Engine designRT-flex electronic engine technology
WHR for reduced emissions
Puls lubrication system
Propulsor designTip rake propeller
Efficiency rudder
Conclusion
50 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Efficiency improvement by Wärtsilä Efficiency Rudder
Becker Marine Systems and Wärtsilä co-operate on rudders (contract signed Dec2006)
Introduction of co-operation with Becker Marine Systems
51 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Efficiency improvement by Wärtsilä Efficiency Rudder
KSR Technology
Twisted Leading EdgeTechnology
Flap Technology
Rudder BulbTechnology
Hub Interface
52 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Efficiency improvement by Wärtsilä Efficiency Rudder
Technical benefits Wärtsilä Efficiency Rudder- Optimised combination of rudder and propeller- Reduced drag and better efficiency due to rudder bulb- Improved hull efficiency- Reduced rudder drag due to asymmetric profile- Less rudder cavitation due to better alignment of the flow behind the
propeller- Application of flap reduces steering angles and improves service
performance
Expected eficiency improvement- 6% (TLE 1.5%, rudder bulb 4%, propeller 1%)
53 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Introduction
Engine designRT-flex electronic engine technology
WHR for reduced emissions
Puls lubrication system
Propulsor designTip rake propeller
Efficiency rudder
Conclusion
54 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Propulsion efficiency improvements through:RT-flex common rail technology
Waste heat recovery
Wärtsilä efficiency rudder
Lower fuel cost, lower vessel operating costs
Less emissions
55 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Less fuel consumption through propulsion efficiency improvements
12RTA96C, 75% loadversus12RT-flex96C with WHR and ER
RT-flex common rail technology2 g/kWh lower fuel consumption1.2 % efficiency gain
Waste heat recovery system10% efficiency gain16 g/kWh lower fuel consumption
Wärtsilä efficiency rudder6% efficiency gain10 g/kWh lower fuel consumption
Cumulative:17.2% efficiency gain28 g/kWh lower fuel consumption
56 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Less fuel costs through propulsion efficiency improvements
12R-flex96C, 75% load, 51’480 kW6’000 operating hours per yearHeavy fuel price = 350 $ per tone
28 g/kWh HFO saving
3’000’000 $ per year fuel cost saving
57 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Less CO2 emissions through propulsion efficiency improvements
12RTA96C, 75% load 29’000 kg/h CO2 emissionversus12RT-flex96C
RT-flex common rail technology2 g/kWh lower fuel consumption1.2 % efficiency gain 360 kg/h CO2 reduction
Waste heat recovery system10% efficiency gain16 g/kWh lower fuel consumption 2’900 kg/h CO2 reduction
Wärtsilä efficiency rudder6% efficiency gain10 g/kWh lower fuel consumption 1’740 kg/h CO2 reduction
Cumulative:17.2% efficiency gain 5’000 kg/h CO2 reduction
58 © Wärtsilä Ecological power for ship propulsion / H. Schmid
Efficient Propulsion for Seagoing Vessels
Cost savings through less CO2 emissions with CO2 emissioncertificates
12R-flex96C, 75% load, 51’480 kW6’000 operating hours per yearValue for 1 tone CO2 = 20 $
5’000 kg/h CO2 reduction
600’000 $ per year CO2 certificates trading
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