Consider the ideal Rankine cycle with superheat described in Problem. An open feedwater heater (and accompanying pump) is to be added to the cycle, with the pressure of the open feedwater heater being 1 MPa. Determine the net power produced, the fraction of water extracted from the turbine, and the thermal efficiency of this modified cycle.
Problem
An ideal Rankine cycle with superheat has water as the working fluid. Superheated steam, with a pressure of 20 MPa and a temperature of 600°C, enters the turbine, and a saturated liquid at 25 kPa exits the condenser. The mass flow rate of the water is 200 kg/s. Determine the net power produced, the exit state of the water from the turbine, and the thermal efficiency of the cycle.
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