8-142 Water enters a pump at 100 kPa and 30°C at a rate of 1.35 kg/s, and leaves at 4 MPa. If the pump has an isentropic efficiency of 70 percent, determine a) the actual power input, b) the rate of frictional heating, c) the exergy destruction, and d) the second-law efficiency for an environment temperature of 20°C. | |
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