Steam power plant operates on the reheat-regenerative Rankine Cycle with a close

Question

Steam power plant operates on the reheat-regenerative Rankine Cycle with a closed feedwater heater. Steam enters the turbine at 8 MPa and 500 Celsius at a rate of 15 kg/s and is condensed in the condenser at a pressure of 20 KPa. Steam is reheated at 3 MPa to 500 Celsius. Some steam is extracted from the low-pressure turbine at 1 MPa, is completely condensed in the closed feedwater heater, and pumped to 8 MPa before it mixes with the feedwater at the same pressure. Assuming isentropic efficiency of 88 percent for the turbine and pump, find

a. Temperature of steam at the inlet of closed feedwater heater
b. mass flow rate of steam extracted from turbine for closed feedwater heater
c. net power output
d. thermal efficiency

Explanation / Answer

b. mass flow rate of steam extracted from turbine for closed feedwater heater

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