Consider a 600-MW regenerative-Rankine-cycle steam power plant with an open feedwater heater, as shown in Fig. 9.17. The boiler pressure is 8 MPa, the extraction pressure is 1.5 MPa, and the condenser pressure is 6 kPa. The high pressure turbine inlet temperature is 820 K. The water leaving the condenser is saturated liquid. The exit state of the feedwater heater is saturated liquid. 

Determine the thermal efficiency of the power plant and the boiler mass flow rate (kg/s).

Transcribed Image Text:

m Boiler Morn m ym Pump 2 m Open feed- water heater (a) (1-y) m 3 6 Pump 1 Turbine (1-y) m Condenser Temperature, T 21 6 m y m (1-y) m Entropy, s (b) 5 3 m 4 (1-y) m S