THERMODYNAMIC CYCLES WITH SCO2 CYCLE TOPPING

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THERMODYNAMIC CYCLES WITH SCO2 CYCLE TOPPING ( thermodynamic-cycles-with-sco2-cycle-topping )

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15 a gas turbine system having a compressor for increas ing the pressure of air fed thereto, a combustor ' having an input to receive the compressed air from the compressor and an input to receive fuel, the compressed air and fuel being burned in said com bustor to form hot combustion products, means for placing said hot combustion products in heat trans fer relationship with the CO2 in said primary heat exchanger to heat the CO2, and a turbine con nected to receive the combustion products from said primary heat exchanger, said turbine expand ing and cooling said combustion products to ex tract work therefrom to drive said compressor, said CO2 turbine being connected at its high pressure side to said primary heat exchanger and on its low pressure side to said recuperator, said recuperator being connected to pass a portion of the low pres sure CO2 to said secondary heat exchanger, said secondary heat exchanger cooling the CO2 and 20 conducting itto said CO2 pump which pressurizes said CO2, and conducts it to the high pressure side of said recuperator, said system including a C02 compressor connected to receive a portion of the low pressure CO2 from said recuperator and to 25 pressurize it; said recuperator high pressure side includingajunctionforreceiptoftheCO2 pressur ized by said CO2 compressor, the heat engine fur therincluding: a primary boiler connected to receive the combus tion products from said turbine, said primary boiler transferring heat from the combustion products to pressurized water to generate steam therefrom; asteamturbineconnectedtoreceivethesteamfrom35 said primary boiler and to expand itto extract work therefrom; 40 45 50 55 "60 65 16 a condenser connected to receive the steam once the 'work has been extracted therefrom, said condenser converting the work extracted steam to water; a water pump connected to said condenser to pres surize the water therefrom; ' feed water heater means connected to said water pump andbeinginheattransferrelationshiptosaid secondaryheatexchangerwhichextractsheatfrom the CO2 by heating the pressurized water; and means for conducting the pressurized water from said feed water heater means to said primary boiler for heating into steam. ‘ 2. The heat engine de?ned in claim 1 including: a supplementary combustor for burning fuel and air supplied thereto, said supplementary combustor being connected to supply the combustion prod ucts thereof to said primary boiler to supply addi tional heat thereto; a secondary boiler connected to receive the combus tionproductsfromsaidprimaryboilerandpressur ized water from said feed water heater means, said secondary boiler transferring heat from the com bustionproductstothepressurizedwatertogener ate steam therefrom; and a regenerator connected to receive the combustion productsfromsaidsecondaryboiler,saidregenera tor also being connected between said compressor and said combustor whereby said regenerator transfers heat from the combustion products to ‘the compressed air. 3. The heat engine de?ned in claim 1 including: a coal gasi?er connected to receive compressed air from said compressor to pressurize the process of conversion of coal into gaseous fuel; and meanstoconductthegaseousfueltosaidcombustor 3,971,211 forburning. * * va: * *

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THERMODYNAMIC CYCLES WITH SCO2 CYCLE TOPPING

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