A dual-fluid heat exchanger has 5 kg/s water entering at 40C, 150 kPa and leaving at 10C,

Question:

A dual-fluid heat exchanger has 5 kg/s water entering at 40◦C, 150 kPa and leaving at 10◦C, 150 kPa. The other fluid is glycol, entering at −10◦C, 160 kPa and leaving at 10◦C, 160 kPa. Find the required mass flow rate of glycol and the rate of internal heat transfer.

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