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A stream of oil,with specific heat 2.4 kJ/kg K, flowing at 1000 kg/hr is to becooled from 130°C to 80°C in a heat exchanger, using 1200kg/hr water at 20°C as the cooling medium. The predictedoverall heat transfer coefficient, based on the outside diameter ofthe inside pipe is 360 W/m2K . Specific heat(Cp) for water is 4.2 kJ/kg K

a. CalculateΔTLMif the flow is co-current

b. Calculate the heat transfer area required if the flow is co-current

c. CalculateΔTLMif the flow iscounter-current.

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