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Question: in a thermofluids lab a student is analysing a prototype...

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In a thermofluids lab, a student is analysing a prototype shell and tube heat exchanger used to increase the temperature of ethyl alcohol (cp=2670cp=2670 J/kgK) which is passed through the tubes at a rate of 2.1 kg/s where the outlet temperature of the alcohol is 70o70oC and the inlet temperature is 25o25oC. The design consists of 8 tube passes and 2 shell passes. This is achieved by hot water (cp=4190(cp=4190 J/kgK) entering through the shell side at 95o95oC and exiting at 45o45oC. The overall heat transfer coefficient is UiUi is 950950 W/m22K. Calculate the heat exchanger's heat transfer surface area.

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