A Rankine cycle with superheat and reheat delivers steam to a turbine at 20 MPa. The condenser pressure is 27 kPa. The turbine has an isentropic efficiency of 0.80, and the pump has an isentropic efficiency of 0.72. The cycle produces 600 MW of power. Plot the mass flow rate of the steam, the net heat input, the exit quality (and temperature) from the turbine, and the thermal efficiency of the cycle for (a) a turbine inlet and reheat temperature of 550°C and a reheat pressure ranging from 500 kPa to 10 MPa; (b) a reheat pressure of 5 MPa, reheat temperature of 500°C, and turbine inlet temperatures from the steam generator ranging between 500°C and 650°C; and (c) a reheat pressure of 5 MPa, a turbine inlet temperature from the steam generator of 600°C, and reheat return temperatures ranging from 400°C to 600°C.
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