Chemical Engineering > GATE 2014 > Heat Exchangers
An oil with a flow rate of 1000 kg/h is to be cooled using water in a double-pipe counter-flow heat exchanger from a temperature of 70°C to 40°C. Water enters the exchanger at 25°C and leaves at 40°C. The specific heats of oil and water are 2 kJ kg-1K-1 and 4.2 kJ kg-1 K-1, overall heat transfer coefficient is 0.2 kW m-2K-1. The minimum heat exchanger area (in m2) required for this operation is
Correct : 3.85
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