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FUEL GAS HANDLING SYSTEMAND BOG RELIQUEFACTION
FOR LNG CARRIEREIRIK MELAAEN
WRTSIL OIL & GAS SYSTEMS AS
1 Wrtsil 12 November 2013 Fuel Gas Handling System and BOG Reliquefaction for LNG Carrier_Eirik Melaaen
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Wrtsil Oil & Gas Systems
Agenda: BOG Reliquefaction plant
Low Pressure Gas to Engine(e.g. DFDE, 2-Stroke DFE) and BOG
Reliquefaction System
High Pressure Gas to Engine(Gas Diesel Engine) and BOG
Reliquefaction System
Future concepts
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Our Expert ise in the Gas Value Chain
Exploration &development
Production
FPSOFlare recovery
Oil separation
LNG carrier
LNG liquefaction& terminal
Distribution & transportPower generation
Oil tankerwith VOC
Exploration &
Drilling
Production &
liquefaction
Transport &
storage
Receiving
terminals ®asification
Distribution &
transport to theusers
LNG fuel gas
systems for OSVs
Gensets
LNG fuel gas systems
LPG, LEG & LNG cargo
handling
On- & Offshore small
scale liquefaction
Antiflaring/VOC
Oil separation
Gas FPSO
Jetty & Floating
regasification
Bunkering & barges
Receiving terminals
Gas/LNG
distribution/logistics
Feed gas to Power
plants
LNG bunkering
& barges
LNG fuelled
vessels
Regasification(FSRU/JRU)
Small scaleliquefaction plants
LNG/LBG
LNG receivingterminal
Re-liquefaction ofBoil Off Gas,
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First free-standing small scale
LNG plant in Northern Europe
delivered March 2003.
Hamworthy EPCIC contract
with GASNOR.
Technology feasibility and
robustness thoroughly and
successfully demonstrated.
35 LNG BOG
Reliquefaction systems
Kollsnes II LNG
2 x capacity of
existing Linde plant
(Kollsnes I).
Hamworthy EPCIC
contract with
GASNOR.
Full production
August 2007.
Al Gatt ara (Hyund ai) BOG Reliquefactio nSystem (58,000 tpy )
Kollsnes II (Gasnor) LNG Plant(84,000 tpy )
Snurrevarden LNG Plant(22,000 tpy )
LNG Technology Development
Wrtsil (Hamworthy) LNG process history
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BOG RELIQUEFACTION PLANTBOG RELIQUEFACTION PLANT
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BOG to Engines or Returned to Tank
Different solutions available for LNG carrier propulsion:
1. Use BOG & LNG as fuel e.g steam turbines, dual-fuel diesel electric, dual-fuel engines
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Pattern for ships using BOG & LNG as fuel for propulsion
Laden BallastBallast
Maximum
(Laden
voyage)
Minimum
(Ballast
voyage)
LNG level
in tanks
Minimum heel required for cool down of tanks
Fuel used during roundtrip
(Natural BOG & forced)
Additional LNG delivered
with full BOG
Reliquefaction System
2. BOG reliquefaction, liquefy and sell excessive BOG or all LNG loaded onboard
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Boil-off gas from cargo tanks vs. Fuelgas required by the engine
12 November 2013 Fuel Gas Handling System and BOG Reliquefaction for LNG Carrier_Eirik Melaaen7 Wr ts il
Speed of the Vessel (knots)
Boil-offGas(kg/hr)
Available BOG
BO
Gconsumed
intheengine
Excess
BOG
ForcedLNG
Balance between
Vessel speed andBOG flow
Av
ailableBOG
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Mark III layout/QG
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Cold box
Typical dimensions: 30 x 22,5 x 7 m (L x W x H)Equipment weights: 240 ton
LNG pumpskid N2
reserviorN2 supplyskid
BOGcompressorsPre-heater
N2companders
N2companders
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ENGINES REQUIRING LOWENGINES REQUIRING LOW
PRESSURE GASPRESSURE GAS(DFDE, 2(DFDE, 2--STROKE DFE)STROKE DFE)
AND BOG RELIQUEFACTIONAND BOG RELIQUEFACTIONPLANTPLANT
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Boil-offgas
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LP-compressor
BOG Reliquefaction System (LNGRS)Low-Pressure Fuel Gas Supply System (LP FSSS)
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Wrtsil Oil & Gas Systems AS
12 November 2013 Fuel Gas Handling System and BOG Reliquefaction for LNG Carrier_Eirik Melaaen12 Wrtsil
Dual-fuel propulsion system
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ENGINES REQUIRING HIGHENGINES REQUIRING HIGH
PRESSURE GASPRESSURE GAS((GasGas DieselDiesel EngineEngine))
AND BOG RELIQUEFACTIONAND BOG RELIQUEFACTIONSYSTEMSYSTEM
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BOG Reliquefaction System (LNGRS)High-Pressure Fuel Gas Supply System (HP FGSS)
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HP-pump and Optimizer
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PFD Vaporization System
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TO GAS ENGINE
HP PUMP
BRINE PUMP
LNG VAPORIZER
STEAM/HOT WATERHEATER
HIGH PRESSURE GASOR LNG FROM CARGO TANKS
CONDENSATE FROM BOG RS
Temprature: 45 10C
Pressure: Max 300 bar
Temprature: -160C
Pressure: 3-5 bar
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HP LNGpump (2)Brineheater (1)
Brinecirculationpump (2)
Pulsedamper (1)
Suctiondrum (1)
LNG vaporizer(1)
Updated Arrangement - Gas Supply System
Typical dimensions: 7 x 3 x 2 m (L x W x H)Equipment weights: Ca 25 ton
HP LNGpump (2)
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BOG Reliquefaction System (LNGRS)High-Pressure Fuel Gas Supply System (HP FGSS)
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HP-compressor and HP-pump
LNGRS for excessive BOG?
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Wrtsil Oil & Gas Systems AS
12 November 2013 Fuel Gas Handling System and BOG Reliquefaction for LNG Carrier_Eirik Melaaen18 Wrtsil
Layout Burckhardt compressors + BOG Reliq plant
Typical dimensions:30 x 22,5 x 7 m (L x W x H)
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FUTURE CONCEPTSFUTURE CONCEPTSNEW MRNEW MR
TWO REFERENCES:TWO REFERENCES:NEW MR DEMONSTRATION PLANTNEW MR DEMONSTRATION PLANT 2,5 TON/DAY2,5 TON/DAY
NEWMR EGE PLANTNEWMR EGE PLANT 11 TON/DAY11 TON/DAY
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Demonstration plant 2,5 ton/hr
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New MR Process Overview
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Pictures EGE - Project
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Flow Sheet of Liquefaction Plant
12 November 201323 Wrts il
H2O & CO2removal
LNG tank
Gas
pre-
cooling
Cold Box
MR
refrigeration
unit
Pre Cooling
system
Main biomethane flow
Mixed refrigerant (MR) flow
CO2 from stripper column
Glycol cooling from pre-cooling unit
Return gas truck loading
Export LNG pump
Gas return
from trucks
Raw gasinlet
To flare gas
systemExpansion
Flare gas
H2O
&CO2
Pretreatment Liquefaction process
Storagesystem
LBG Truck
Filling station
Fuel Gas Handling System and BOG Reliquefaction for LNG Carrier_Eirik Melaaen
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BOG Reliquefaction System (LNGRS)
NewMR LP-Pressure Fuel Gas Supply System (LP FGSS)
Compressor and Forcing Vaporizer
LNGRS for excessive BOG
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Summary Wrtsil NewMR technology
BOG reliquefaction systemon LNG vessels in the fu ture
NewMR
Why?
Demonstration plant proven
to be successful
Robust
Low OPEX
Load variations
Robust main rotating
machinery with high
efficiency
Designed for unmanned
operation
Shorter delivery time
Simple energy supply,
only electric power needed
Easy and quick start up and
shut down of all systems
Standardisation of
capacities: 1,5 ton/hr, 2,5
ton/hr etc.
Supplied as modules
Refrigerant process withphase changes which reduce
the size of equipment and
piping
Simplified maintenance
Reduced CAPEX compared
to Nitrogen loop
Two references
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EIRIK MELAAENEIRIK MELAAENBusiness DevelopmentBusiness Development ManagerManager
Tel:Tel: +47 66 10 95 66+47 66 10 95 66
Mobile: +47 959 67 377Mobile: +47 959 67 377Fax:Fax: +47 815 48 510+47 815 48 510
EE--mail:mail: [email protected]@hamworthy.comWeb:Web: http://www.hamworthy.comhttp://www.hamworthy.com
Thank you for your attention!