2.4 investigation_an_environment_friendly_propulsion_system_for_lngc_rev[1].pdf
TRANSCRIPT
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PROPULSION SYSTEM FOR LNG CARRIERPROPULSION SYSTEM FOR LNG CARRIER
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by L.M. Yan & J.J. Huangby L.M. Yan & J.J. Huang
MARINE DESIGN & RESEARCH INSTITUTE OF CHINAMARINE DESIGN & RESEARCH INSTITUTE OF CHINA
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ContentContent
11.. GeneralGeneral IntroductionIntroduction
22.. FeaturesFeatures ofof DifferentDifferent PropulsionPropulsion SystemsSystems
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55.. OtherOther IssuesIssues forfor ConsiderationConsideration
66.. ConclusionConclusion
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1. Introduction1. Introduction
WhatWhat isis naturalnatural gas?gas?
WhatWhat isis LNGC?LNGC?
WhatWhat isis anan environmentenvironment friendlyfriendly propulsionpropulsion system?system?
SteamSteam turbineturbine propulsionpropulsion systemsystem
LSRLLSRL
DFDEDFDE
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2. Feature of Different Propulsion System
SteamSteam boilerboiler withwith dualdual fuelfuel burnerburner
BurningBurning combinationcombination ofof gasgas andand fuelfuel
oiloil
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2. Feature of Different Propulsion System
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plusplus rere--liquefactionliquefaction plantplant
ExtensivelyExtensively usedused forfor conventionalconventional cargocargo shipship
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2. Feature of Different Propulsion System
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systemsystem (DFDE)(DFDE)
BurningBurning withwith 9999%% ofof gasgas andand 11%% ofof
pilotpilot oiloil
~~ cy n erscy n ers or or powerpower s a ons a on
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3. Relationship between PP and BOG
The largest feature of LNGC is the issue ofThe largest feature of LNGC is the issue of
as appene a ways. n oras appene a ways. n orenvironment protection, BOG shall beenvironment protection, BOG shall be
by GCU directly or other means of energyby GCU directly or other means of energy
wasting.wasting.
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Relationship between engine power and
cargo volume
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Power balance of different size of LNGC
It is clearly, a certain balance point is existed forIt is clearly, a certain balance point is existed for
different Class and cargo volume of LNGC wheredifferent Class and cargo volume of LNGC wherepower are produced by BOG and no more other fuel ispower are produced by BOG and no more other fuel is
needed and eventually none excess BOG is needed toneeded and eventually none excess BOG is needed to
. .
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4. Emission calculation of air pollution
TheThe amountamount ofof airair pollutionpollutionEmission of different system
120.00%
environmentenvironment friendlyfriendly oror notnot.. TakeTake aa
standardstandard sizesize of of 150150,,000000mm LNGLNG80.00%
100.00%
carriercarrier forfor example,example, onon thethe basisbasis ofof
applyingapplying threethree differentdifferent propulsionpropulsion
system,system, COCO22 NOxNOx andand SOxSOx 40.00%
60.00%
CO2
NOx
SOx
emissionemission isis toto bebe calculatedcalculated
separatelyseparately for for environmentalenvironmental
0.00%
20.00%
ana ys sana ys s.. 1 2 3
1- Steam turbine propulsion system
2- Low-speed diesel engine propulsion system + RL
3- Dual-fuel engine propulsion system
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4. 1 Emission for steam turbine propulsion system
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EquivalentEquivalent SFOCSFOC isis 294294g/kWg/kW..hh
COCO22 isis highesthighest
xx ss m norm nor ww gasgas mo emo e
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-.
plus Re-liquefaction plant
PowerPower efficiencyefficiency isis 4848%%..
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NOxNOx isis 1414..44g/kWhg/kWh forfor mainmain engineengine
NOxNOx isis 99..77g/kWhg/kWh forfor auxiliaryauxiliary engineengine
SulphurSulphur contentcontent isis 33..55%% m/mm/m
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4. 3 Dual fuel diesel electric propulsion system (DFDE)
PowerPower efficiencyefficiency isis aboutabout 4343..44%%
NOxNOx isis11..44 g/kWhg/kWh (below(below TierTier III)III)..
SOxSOx isis minorminor withwith gasgas modemode
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5. Other issues for consideration
EnvironmentEnvironment--friendlyfriendly propulsionpropulsion systemsystem notnot
considerconsider otherother factorsfactors::
ShipShipss speedspeed
BalanceBalance ofof BOGBOG andand propulsionpropulsion powerpower
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6. Conclusion
NewNew regulationsregulations forfor thethe PreventionPrevention ofof Air Air
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AA propulsionpropulsion systemsystem burningburning withwith cleanclean energyenergy
(natural(natural gas)gas) isis preferredpreferred..
maxmax ..
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Thank you!Thank you!