Question

In the power plant shown in Figure P2 below, steam leaves the boiler at p3 P2 6 MPa and ??-320°C, flows through the throttling valve, which drops the pressure to p4-4 MPa. then enters the turbine in which it expands to the condenser pressure of p5-10 kPa. The water then leaves the condenser at p 10 kPa and T1-40°C. The net power output is 450 MW. The turbine isentropic efficiency is 85% and that of the pump is 78%. Determine: a) The steams mass flow rate. b) The rate of entropy production in the turbine. c) The cycles thermal efficiency

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