The average heat transfer coefficient is 20 btuhr ft2 f the

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Air enters a 1 ft diameter 36 ft long duct at 140f and 1 atm at a mean velocity of 21 ft/sec. The stream is cooled by the water outside the duct. The average heat transfer coefficient is 20 Btu/hr ft^2 F. The duct temperature is constant at 50 F. Determine the exit air temperature and the rate of heat transfer.

Reference no: EM13621899

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