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Waste Heat Recovery WHRS

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Waste Heat Recovery WHRS ( waste-heat-recovery-whrs )

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Turbochargers Efficiency between 3 to 5% of main engine SMCR power depending on size Funnel (boiler) Gearbox Coupling Generator Exhaust gas turbine Board grid Power turbine unit Exhaust gas receiver Main engine Power turbine 4.5 - 6.5 m Reduction gear Width: 2 - 3 m Generator 2.2 MWe unit - dimensions Fig. 4: Schematic diagram of the TCS-PTG system ducing. total. fuel. costs,. ship. EEDI. and. emissions. Power turbine and generator (PTG) The. simplest. and. cheapest. system. consists.of.an.exhaust.gas.turbine.(also. called. a. power. turbine). installed. in. the. exhaust. gas. bypass,. and. a. generator. that. converts. power. from. the. power. turbine. to. electricity. onboard. the. ship,. see.Fig..4. The. power. turbine. and. the. generator. are.placed.on.a.common.bedplate..The. MAN. Diesel. &. Turbo. TCS-PTG. power. range.is.shown.in.Fig..5. TCS-PTG.stands.for.Turbo.Compound. System.–.Power.Turbine.Generator.and. is.an.MAN.Diesel.&.Turbo.product. The. power. turbine. is. driven. by. part. of. the. exhaust. gas. flow. which. bypasses. the. turbochargers.. The. power. turbine. produces. extra. output. power. for. elec- tric. power. production,. which. depends. on. the. bypassed. exhaust. gas. flow. amount. The. TCS-PTG. WHRS. solution. offers. both. standalone. and. parallel. running. electric.power.sourcing.for.the.ship. The. exhaust. gas. bypass. valve. will. be. closed. at. an. engine. power. lower. than. about. 50%. SMCR,. where. the. engine. will.run.with.the.same.high.efficiency.as. for.a.normal.MAN.B&W.low.speed.two- stroke.engine.. Using. a. TCS-PTG. WHRS. solution. will. provide.a.3-5%.recovery.ratio,.depend- ing.on.the.main.engine.size. For.more.information.on.TCS-PTG,.see. Ref..2. Steam turbine and generator (STG) The.second.system.builds.on.the.prin- ciple.exhaust.gas.bypass.and,.thereby,. increasing.the.exhaust.gas.temperature. before.the.boiler.without.using.a.power. turbine. When. applying. the. steam. turbine. (ST). as. a. stand-alone. solution,. the. exhaust. gas. bypass. stream. is. mixed. with. the. exhaust.outlet.from.the.turbocharger(s),. increasing.the.exhaust.gas.temperature. before.the.boiler.inlet. When. part. of. the. exhaust. gas. flow. is. bypassed. the. turbocharger,. the. total. amount.of.air.and.gas.will.be.reduced,. and. the. exhaust. gas. temperature. af- ter. the. turbocharger. and. bypass. will. increase.. This. will. increase. the. obtain- able. steam. production. power. for. the. exhaust.gas.fired.boiler. By. installing. a. steam. turbine. (often. called. a. turbo. generator),. the. obtaina- ble.steam.production.from.the.exhaust. boiler. system. can. be. used. for. electric. power. production.. The. steam. turbine. is.installed.on.a.common.bedplate.with. the. generator. in. the. same. manner. as. the. power. turbine. and. the. generator.. Fig..6.shows.the.STG.solution. TCS-PTG based on TCR - series Type TCS-PTG18 TCS-PTG20 TCS-PTG22 max. Pel 1,070 kW 1,560 kW 2,700 kW TCS-PTG based on TCA - seriers Type max. Pel TCS-PTG55 4,020 kW Fig. 5: MAN Diesel & Turbo TCS-PTG WHRS power range Waste.Heat.Recovery.System.(WHRS).for.Reduction.of.Fuel.Consumption,.Emission.and.EEDI 7 2- 3m

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