A Rankine cycle with reheat and a closed feedwater heater (with its drain cascaded back to the condenser) has 150 kg/s of superheated steam at 3000 psia and 1100°F entering the turbine. Steam is extracted at a pressure of 1000 psia and sent to the reheater, where it returns to the turbine at 1050°F. The feedwater temperature leaving the closed feedwater heater is equal to 10°F below the temperature of the steam leaving the turbine and being sent to the closed feedwater heater. The extracted water in the drain of the closed feedwater heater has a quality of 0. The condenser pressure is 2 psia. The isentropic efficiency of the turbine is 0.78 and of the pump is 0.68. Plot the net power produced, the mass flow rate of the steam extracted and sent to the closed feedwater heater, and the thermal efficiency of the cycle for pressures of the extracted steam directed toward the closed feedwater heater from the turbine ranging between 50 psia and 900 psia.
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