In a thermofluids lab, a student is analysing a prototype single-pass cross-flow heat exchanger used to...

In a thermofluids lab, a student is analysing a prototype single-pass cross-flow heat exchanger used to cool water from 90oC to 60oC by transferring its heat to an air stream with an inlet temperature of 30oC without mixing. The water and air flow rates are 42,000 kg/h and 180,000 kg/h respectively. Assume that for the water cp=4.18kJ/kg⋅oC and for the air cp=1.02kJ/kg⋅oC. Calculate the log mean temperature difference for this heat exchanger.

Expert Solution

samet mamat answered 2 years ago

LMTD of a cross-flow heat exchanger is

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