FUEL GAS HANDLING SYSTEM AND BOG RELIQUEFACTION FOR LNG CARRIER EIRIK MELAAEN WÄRTSILÄ OIL & GAS SYSTEMS AS
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1 FUEL GAS HANDLING SYSTEM AND BOG RELIQUEFACTION FOR LNG CARRIER EIRIK MELAAEN WÄRTSILÄ OIL & GAS SYSTEMS AS 1 Wärtsilä
2 Wärtsilä 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 2 Wärtsilä
3 Our Expertise in the Gas Value Chain Distribution & transport Power generation LNG liquefaction & terminal Regasification (FSRU/JRU) LNG receiving terminal Production Exploration & development Exploration & Drilling Re-liquefaction of LNG Boil fuelled Off Gas, vessels Production & liquefaction FPSO Flare recovery Oil separation LNG carrier Transport & storage Small scale liquefaction plants LNG/LBG Oil tanker with VOC Receiving terminals & regasification LNG bunkering & barges Distribution & transport to the users LNG fuel gas systems for OSVs Gensets On- & Offshore small scale liquefaction Antiflaring/VOC Oil separation Gas FPSO LNG fuel gas systems LPG, LEG & LNG cargo handling Jetty & Floating regasification Bunkering & barges Receiving terminals Gas/LNG distribution/logistics Feed gas to Power plants 3 Wärtsilä
4 LNG Technology Development Wärtsilä (Hamworthy) LNG process history 35 LNG BOG Reliquefaction systems Snurrevarden LNG Plant (22,000 tpy ) First free-standing small scale LNG plant in Northern Europe delivered March Hamworthy EPCIC contract with GASNOR. Technology feasibility and robustness thoroughly and successfully demonstrated. Kollsnes II LNG 2 x capacity of existing Linde plant (Kollsnes I). Hamworthy EPCIC contract with GASNOR. Full production August Al Gattara (Hyundai) BOG Reliquefaction System (58,000 tpy ) Kollsnes II (Gasnor) LNG Plant (84,000 tpy ) 4 Wärtsilä
5 BOG RELIQUEFACTION PLANT
6 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 2. BOG reliquefaction, liquefy and sell excessive BOG or all LNG loaded onboard LNG level in tanks Pattern for ship s using BOG & LNG as fuel for propulsion Maximum (Laden voyage) Fuel used during roundtrip (Natural BOG & forced) Additional LNG delivered with full BOG Reliquefaction System Minimum (Ballast voyage) Minimum heel required for cool down of tanks Ballast Laden Ballast 6 Wärtsilä
7 Boil-off gas from cargo tanks vs. Fuel gas required by the engine Available BOG Forced LNG Boil-off Gas (kg/hr) BOG consumed in the engine Excess BOG Available BOG Balance between Vessel speed and BOG flow Speed of the Vessel (knots) 7 Wärtsilä
8 BOG Reliquefaction System (LNGRS Mark III) No feeding of gas to engines (QFLEX vessels) Boil-off gas 8 Wärtsilä
9 Mark III layout/qg Cold box N2 companders LNG pump skid N2 supply skid N2 reservior Pre-heater BOG compressors N2 companders Typical dimensions: 30 x 22,5 x 7 m (L x W x H) Equipment weights: 240 ton 9 Wärtsilä
10 ENGINES REQUIRING LOW PRESSURE GAS (DFDE, 2-STROKE DFE) AND BOG RELIQUEFACTION PLANT
11 BOG Reliquefaction System (LNGRS) Low-Pressure Fuel Gas Supply System (LP FSSS) LP-compressor Boil-off gas 11 Wärtsilä
12 Wärtsilä Oil & Gas Systems AS Dual-fuel propulsion system 12 Wärtsilä
13 ENGINES REQUIRING HIGH PRESSURE GAS (Gas Diesel Engine) AND BOG RELIQUEFACTION SYSTEM
14 BOG Reliquefaction System (LNGRS) High-Pressure Fuel Gas Supply System (HP FGSS) HP-pump and Optimizer 14 Wärtsilä
15 PFD Vaporization System STEAM/HOT WATER HEATER BRINE PUMP CONDENSATE FROM BOG RS OR LNG FROM CARGO TANKS HP PUMP HIGH PRESSURE GAS TO GAS ENGINE Pressure: 3-5 bar Temprature: -160 C LNG VAPORIZER Pressure: Max 300 bar Temprature: 45 ±10 C 15 Wärtsilä
16 Updated Arrangement - Gas Supply System Pulse damper (1) LNG vaporizer (1) Suction drum (1) Brine circulation pump (2) Brine heater (1) HP LNG pump (2) HP LNG pump (2) Typical dimensions: 7 x 3 x 2 m (L x W x H) Equipment weights: Ca 25 ton 16 Wärtsilä
17 BOG Reliquefaction System (LNGRS) High-Pressure Fuel Gas Supply System (HP FGSS) HP-compressor and HP-pump LNGRS for excessive BOG? 17 Wärtsilä
18 Wärtsilä Oil & Gas Systems AS Layout Burckhardt compressors + BOG Reliq plant Typical dimensions: 30 x 22,5 x 7 m (L x W x H) 18 Wärtsilä
19 FUTURE CONCEPTS NEW MR TWO REFERENCES: NEW MR DEMONSTRATION PLANT 2,5 TON/DAY NEWMR EGE PLANT 11 TON/DAY
20 Demonstration plant 2,5 ton/hr 20 Wärtsilä 12 November 2013 Fuel Gas Handling System and BOG Reliquefaction for LNG Carrier_Eirik Melaaen
21 New MR Process Overview 21 Wärtsilä
22 Pictures EGE - Project 22 Wärtsilä 12 November 2013 Fuel Gas Handling System and BOG Reliquefaction for LNG Carrier_Eirik Melaaen
23 Flow Sheet of Liquefaction Plant Pretreatment Liquefaction process Raw gas inlet H2O & CO 2 removal H2O & CO 2 Gas precooling Pre Cooling system MR refrigeration unit Cold Box Storage system Main biomethane flow Mixed refrigerant (MR) flow CO2 from stripper column Expansion To flare gas system Gas return from trucks Glycol cooling from pre-cooling unit Return gas truck loading Flare gas LNG tank LBG Truck Filling station Export LNG pump 23 Wärtsilä 12 November 2013 Fuel Gas Handling System and BOG Reliquefaction for LNG Carrier_Eirik Melaaen
24 BOG Reliquefaction System (LNGRS) NewMR LP-Pressure Fuel Gas Supply System (LP FGSS) Compressor and Forcing Vaporizer LNGRS for excessive BOG 24 Wärtsilä
25 Summary Wärtsilä NewMR technology BOG reliquefaction system on LNG vessels in the future 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 with phase changes which reduce the size of equipment and piping Simplified maintenance Reduced CAPEX compared to Nitrogen loop Two references 25 Wärtsilä 12 November 2013 Fuel Gas Handling System and BOG Reliquefaction for LNG Carrier_Eirik Melaaen
26 Thank you for your attention! EIRIK MELAAEN Business Development Manager Tel: Mobile: Fax: Web:
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