Question

wGTC η.cn = 95% Gas turbine cycle (GTc) e,I = 100 kW Compressor Turbine Generator 께,- Combustor Pi 100 kPa Regenerator Evaporator Turbine Generator Vapor turbine cycde (VTC) T, = T, + 20 K Condenser 10 Pump Saturated liquid A combined cycle plant operates with a topping gas turbine and a bottoming vapor turbine cycle. The working fluid in the vapor turbine cycle is water. The gas turbine cycle (GTC) electric generator produces 100kW of electric power For air use perform an air-standard analysis using the values: Cp -1.005 kJ/kgK, Cv 0.718 Kj/kgK, k- 1.40, M- 28.97 kg/kmol Let T,-25 C and Po= 100kPa Let T, 1220 K P8 -200 kPa T,-240 C Ту-32 С Regen. Effectiveness: 82% Compressor Pressure Ratio: 11 Gas Compressor Isentropic Efficiency: 82% Gas Turbine Isentropic Efficiency: 86% Vapor Turbine Isentropic Efficiency: 86% Pump Isentropic Efficiency: 88% Find: 1) Mass flow rate through the gas cycle turbine, in kg/h 2) Mass flow rate through vapor cycle turbine, in kg/h 3) Shaft power to the GTC generator, in kW 4) Shaft power to the VTC generator, in kW 5) Rate of heat transfer to gas flowing through combustor, in kW 6) Rate of heat rejection in condenser, in kW Role ofexegwcrg through combustor, in kW 8) Rate of exergy destruction in condenser, in kW 9) Rate of exergy of destruction in evaporator, in kW 10) Plant thermal efficiency, conversion of heat to electric

Answer 1

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660 2 2 300- 13-T 2300 1220 Jt ③Shatt potoer to tte errc qena ator:-

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the vapor acle turbinee ー) 1.チ6 =mmA t.oo S(240-8.) Pi pump= ht =34a.uttJty

Rate of be at trarrter to gas through Combuitor 513-382-11 513-Ta! r)

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