Chemical Engineering > GATE 2012 > Heat Exchangers
In a counter-flow double pipe heat exchanger, oil (m=2 kg/s Cp=2.1 kJ/kg.°C) is cooled from 90°C to 40°C by water (m=1 kg/s, Cp=4.2 kJ/kg.°C) which enters the inner tube at 10°C. The radius of the inner tube is 3 cm and its length is 5 m. Neglecting the wall resistance, the overall heat transfer coefficient based on the inner radius, in kW/m2.K is
Correct : b
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