heat A shell-and-tube heat exchanger containing one shell pass and two tube pass

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A shell-and-tube heat exchanger containing one shell pass and two tube passes heats water moving at a mass flow rate of 2.52 kg/s from 20 degree C to 55 degree C by using hot water under pressure entering at 115 degree C and leaving at 50 degree C. The outside surface area of the tubes in the exchanger is Ao = 9.3 m2. Calculate the mean temperature difference in the exchanger and the overall heat-transfer coefficient Uo . Note: The subscript "o" refers to the fact that the overall heat transfer coefficient in this example is based on the outside area For the same temperatures but using a two shell passes and four tube passes heat exchanger, what would be the mean temperature difference

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heat A shell-and-tube heat exchanger containing one shell pass and two tube pass

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