In a power plant to be operated with the reheated Rankine cycle, whose flow chart is given below, the boiler pressure is 7 MPa and the condenser pressure is 25 kPa. The temperature reached in the superheater and reheater is 723 K. Assuming that the turbines and the pump in the circuit operate isentropically and that the condenser outlet is saturated liquid water; Find the reheater operating pressure at which the thermal efficiency of the cycle is maximum.

Turbine I Turbine ! 3 Q2 Super heater WTI WTH A 6 2 Repeat Heater Condenser 04 Boiler Wp Preheater Q5 / 8 Pump