8-18 A heat engine receives heat from a source at 1500 K at a rate of 700 kJ/s, and it rejects the waste heat to a medium at 320 K. The measured power output of the heat engine is 320 kW, and the environment temperature is 25°C. Determine a) the reversible power, b) the rate of irreversibility, and c) the second-law efficiency of this heat engine. Answers: a) 550.7 kW, b) 230.7 kW, c) 58.1 percent | |
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