Efficient, Low Cost LNG BOG Handling by Integration of Cascade Liquefaction and Laby GI Fuel Gas Compressor forand Laby-GI Fuel Gas Compressor for ME-GI Propulsion System

Carriers &Carriers &Offshore Units

ContentC i t d tiCompany introductionsIntroduction into ME-GI and Laby-GI / Conventional Designs today operatingtoday operatingLaby-GI Control and system descriptionSystem requirements for the handling of excessive BOGy q gReliquefaction in combination with Laby-GIDetailed description of a reliquefaction systemAdvantages and conclusion

Company dataTGE Marine AG is a specialised engineering contractor for gas carrier and offshore unitsTGE i li t d th L d St k E h (AIM) i MTGE is listed on the London Stock Exchange (AIM) since May 15th 2008Main shareholders: ca 30 % Institutional investors 35 4%Main shareholders: ca. 30 % Institutional investors, 35.4% Caledonia Investment, Co-Investors 31.4%, Management 3.2 %Address: Mildred-Scheel-Str. 1, 53175 Bonn, Germany, , yWeb: www.tge-marine.com

Company dataBurckhardt Compression is one of the world’s leading manufacturers of piston compressors (#2)F d d 1844 / F d i ti i 1883Founded 1844 / Focused on reciprocating compressors since 1883Business Lines;

New MachinesNew MachinesCustomer Support ServiceCompressor Componentsp p

World Market leader Laby® Compressors for LEG/LPG and LNG CarriersBurckhardt Compression is listed on the Swiss Stock exchange (SWX)Address: Im Link 5, 8404 Winterthur, SwitzerlandW b b kh dt iWeb: www.burckhardtcompression.com

Different propulsion system for LNGC

+R+Reliquefaction

Propulsion Solution Laby®-GI and ME-GI

®Laby®-GI Fuel Gas System -Control Requirementsq

Variable delivery pressure subject to slow or rapid changeVariable delivery pressure subject to slow or rapid changeVariable tank pressure slow changeWide variation in suction conditions Control of gas delivery pressure

(temperature, pressure)Variation in gas composition(laden ballast voyage)(laden, ballast voyage)Operates on full recycleSimultaneous delivery to ME-GIyengine and GCU

Typical advantages of Laby®-GI

• Flexible cylinder design which offers total flexibilitywhich offers total flexibility

• Especially designed for Off-shore application

• Mass balanced over all cranks

Effect:ect• No 1st, 2nd, 3rd and 4th

order forces and moments due to moving massesdue to moving masses

Ad d S l ti bi dAdvanced Solution combined reliquefaction and injection

Market Request:• Handling of excess BOG due to increased efficiency of ME-GI• Handling of excess BOG due to increased efficiency of ME-GI

– Request for part or full reliquefaction capacity• Requests for flexible ship operation (Spot Market)• Optimized fuel management requested

– HFO and NG burning due to economic and ecological decision• Proven design of equipment and reliquefaction process• Proven design of equipment and reliquefaction process• OPEX and CAPEX omptimized

Handling BOG in dual fuel propulsion:

H dli BOG i d l f l l iHandling BOG in dual fuel propulsion:

Excess Gas reliquefaction safes energy:

Available technologiesState of the art: Nitrogen Compander ProcessState o t e a t t oge Co pa de ocess

Excess gas reliquefaction plus high pressure compressorFull reliquefaction plus high pressure pump & vaporiser

Proposed SolutionExcess Gas reliquefaction with a cascade processq p

TGE References for Ethylene Cascade Plants:

TGE delivered 67 Cascade plants for LEG Carrierrs pbetween 1983 and 2009Combination of a variety of Burckhardt Compression reciprocating compressors and screw compressors ofreciprocating compressors and screw compressors of different make and designPlants working with Propylene, R22 and R404A as refrigerantsrefrigerantsDifferent heat exchanger designs including kettle type, dry film ethylene condensers Recently delivered first combined Fuel gas / Reliquefaction plant for Coral Methane

The Cascade Process on a Laby®-GI:

Fuel Gas is sink for incondensables2 Cranks available for Ethylene2 Cranks available for EthyleneExcess Gas available at 40 barEquipment for Ethylene / Propylene is standard for LEGPropylene is standard for LEG CarriersFresh water cooledH ti R f i t S tHermetic Refrigerant System, no lossesCompact design

Laby®-GI 6LP250-7S_1 combined Ethylene and LNG BOG compressor

•Fully separated gas cycle for y p g yEthylene and BOG•Independent capacity control for ME-GI injection and reliquefaction•Mass balance and space•Mass balance and space optimized solution•Operating Range 0-100% flow Ethylene and LNG BOG (independent)•Combined in one frame

Less equipment on board

The Cascade Process on a Laby®-GI:

•Ship capacity up to 210.000 m³ LNG•2 x 75 % BOG / Ethylene compressory p(Laby®-GI)•2 x 75% Refrigerant compressors•1 Cold Box (plate fin heat exchanger)1 R f i t d•1 Refrigerant condenser

Efficiency- based on 170,000 cbm LNG-Carrier

SummarySummaryExcess Gas Reliquefaction is an energy- and cost efficient option f LNG C ifor LNG CarriersThe combination of MAN-GI engine, Burckhardt CompressionLaby®-GI BOG-compressor and TGE cascade process offers aLaby -GI BOG-compressor and TGE cascade process offers a wide range of operating flexibilty at optimised energy consumptionThe system is based on a combination of well known, reliable y ,componentsCombination of BCA BOG compressors and oil injected screw refrigerant compressors is the leading technology for liquefatcion of cryogenic cargoes (other than LNG) onboard gas carriersL b ® GI th t it t thi t h l f LNGLaby®-GI opens the opportunity to use this technology for LNG as wellTGE is the world leading designer of cascade reliquefaction plantsTGE is the world leading designer of cascade reliquefaction plants for Ethylene carriers

Thank you for youry ykind attention

for further information please mail torainer duebi@burckhardtcompression comrainer.duebi@burckhardtcompression.com

sales@tge-marine.com