Prob.1) Consider a combined gas and steam power plant that has a net power output of...

Prob.1) Consider a combined gas and steam power plant that has a net power output of 450 MW. The pressure ratio of the gas turbine cycle is 14. Air enters the compressor at 300 K and the turbine at 1 400 K. The combustion gases leaving the gas turbine are used to heat the steam to 8 MPa. up to 400 ° C in a heat exchanger. The combustion gases exit the heat exchanger at 460 K. An open feedwater heater is incorporated into the steam cycle operating at a pressure of 0.6 MPa. The condenser pressure is 20 kPa. Assuming that all compression and expansion processes are isentropic, graph the physical and T-S diagrams and determine:
a) the ratio of the mass air and steam flows,

b) the required rate of heat input into the combustion chamber and

c) the thermal efficiency of the combined cycle.

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samet mamat answered 7 months ago

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