Problem 7 A steam power plant operates on an ideal reheat-regenerative Rankine with one reheat and two open feedwater heaters. Steam enters the high pressure turbine at 10 MPa, 600 °C and leaves the low pressure turbine at 7 kPa. Steam is extracted from the turbine at 2 MPa and 275 kPa, and it is reheated to 540 °C at a pressure of 1 MPa. Water leaves both feedwater heaters as saturated liquid. Heat is transferred to the steam in the boiler at a rate of 6 MW. Determine (a) the mass flow rate of steam through the boiler, (b) the net power output and (c) the thermal efficiency of the cycle. Boiler, Open FWH Open FWH AP LP Turbine Turbine ·(6) II I Condenser Pump Pump Pump II I