Unformatted text preview: 1.9 kJ/kg ºC. The fluids are used in a counterflow doublepipe heat exchanger, and the oil enters the exchanger at 110ºC and leaves at 75ºC. The overall heattransfer coefficient is 320 W/m 2 ºC. Calculate the heatexchanger surface area. 3. Instead of the doublepipe heat exchanger of Problem 2, it is desired to use a shellandtube exchanger with the water making two shell passes and the oil making four tube passes. Calculate the area required for this exchanger, assuming that the overall heattransfer coefficient remains at 320 W/m 2 ºC....
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 Fall '09
 HojinAHN
 Heat, Heat Transfer, heat transfer coefficient, heat transfer coefficients, doublepipe heat exchanger

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