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Question: ut a closed feedwater heater basically a heat exchanger heats...

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ut. A closed feedwater heater (basically a heat exchanger) heats 20 kg/s of water from 100 C, 20 IPa to 250 C, 20 MPa. The extraction steam from the turbine enters the heater at 4 MPa, 300 C and leaves as saturated liquid. (a) What is the required mass flow rate of the extraction steam? (7 points) (b) Also, estimate the rate of entropy generation in kW/K. (7 points)

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