Question: A closed feedwater heater in a regenerative steam power cycle heats 20 kg/s of water from 100C, 20 MPa to 250C, 20 MPa. The extraction

A closed feedwater heater in a regenerative steam power cycle heats 20 kg/s of water from 100°C, 20 MPa to 250°C, 20 MPa. The extraction steam from the turbine enters the heater at 4 MPa, 275°C, and leaves as saturated liquid. What is the required mass flow rate of the extraction steam?

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