Double Pipe Heat Exchangers?

Posted on 2016-10-21 18:44:00 in Engineering by THOMAS

Water (Cp=4180 J/kg K) is to be heated by solar heated hot air (Cp=1010J/kg K) in a double pipe countercurrent flow heat exchanger. Air enters the heat exchanger at 90 C at a rate of 0.3 kg/s, while water enters at 22 C at a rate of 0.1 kg/s. The overall heat transfer coefficient based on the inner side of the tube is 80 W/m2 K. The length of the tube is 12 m with internal diameter of 1.2 cm. Determine the outlet temperatures of the water and air.

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