Find the specific heat transfer and work

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1. A flow of saturated liquid R-410a at 200 kPa in an evaporator is brought to a state of superheated vapor at 200 kPa, 20?C. Assuming the process is reversible, find the specific heat transfer and specific work.

2. A flow of R-410a at 2000 kPa, 40?C in an isothermal expander is brought to a state of 1000 kPa in a reversible process. Find the specific heat transfer and work.

3. A coflowing heat exchanger has one line with 2 kg/s saturated water vapor at 100 kPa entering. The other line is 1 kg/s air at 200 kPa, 1200 K. The heat exchanger is very long, so the two flows exit at the same temperature. Find the exit temperature by trial and error. Calculate the rate of entropy generation.

Reference no: EM131233904

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