A combined gas turbine–vapor power plant operates as in Fig. Steady-state data at principal states of
the combined cycle are given in the table below. An air-standard analysis is assumed for the gas turbine
in which the air passing through the combustor receives energy by heat transfer at a rate of 50 MW.
Except for the combustor, all components operate adiabatically. Kinetic and potential energy effects are
negligible. Determine (a) the mass flow rates of the air, steam, and cooling water, each in kg/s, (b) the
net power developed by the gas turbine cycle and the vapor cycle, respectively, each in MW, (c) the
thermal efficiency of the combined cycle.
Extracted text: Qin T = 690 K P2 = 13.6 bar 2- T3 = 1580 K 3 P3=13 bar Combustor State p (bar) T ("C) h (kJ/kg) 25 298.2 14 691.4 1663.9 923.2 475.3 204.5 3341.8 2175.6 191.8 Gas turbine 14 1250 Compressor Turbine 4 1 Wgas 5 1 200 147 MW T, = 300 K +1 P =1 bar 125 125 0.1 0.1 500 -4 T = 900 K P4 = 1 bar 8 Air inlet 9 10 20 84.0 Exhaust T = 400 K Ps = 1 bar 11 35 146.7 T, = 520°C P7 = 100 bar Heat exchanger Turbine ++ P6 =P7 Steam Wvap сycle n = 85% Pump Condenser n ėout 9 7, = 80% P9 = Pg=0.08 bar -menonoag