Calculate the second-law efficiency of the coflowing heat

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Calculate the second-law efficiency of the coflowing heat exchanger in Problem 7.113 with an ambient at 17?C.

Problem 7.113

A coflowing (same direction) heat exchanger, shown in Fig. P7.113, has one line with 0.5 kg/s oxygen at 17?C, 200 kPa entering, and the other line has 0.6 kg/s nitrogen at 150 kPa, 500 K entering. The heat exchanger is very long, so the two flows exit at the same temperature. Use constant heat capacities and find the exit temperature and the total rate of entropy generation.

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Reference no: EM131233521

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