A well insulated, thin walled, counter flow heat exchanger is to be used to cool oil (cp 2 20 kJ kg cent deg C) from 150 to 40 deg C at a rate of 2 kg s by water (cp 4 18 kJ kg cent deg C) that enters at 22 deg C at a rate of 1 5 kg s The diameter of the tube is 2 5 cm, and its length is 6 m Determine (a) the rate of heat transfer and (b) the rate of energy destruction in the heat exchanger Hot oil 2 kg s 150c Cold water 1 5 kg s 2290 40C

Question: A well-insulated, thin-walled, counter-flow heat exchanger is to be used to cool oil (cp = 2.20 kJ/kg ¢ °C) from 150 to 40°C at a

A well-insulated, thin-walled, counter-flow heat exchanger is to be used to cool oil (cp = 2.20 kJ/kg €¢ °C) from 150 to 40°C at a rate of 2 kg/s by water (cp = 4.18 kJ/kg €¢ °C) that enters at 22°C at a rate of 1.5 kg/s. The diameter of the tube is 2.5 cm, and its length is 6 m. Determine (a) the rate of heat transfer and (b) the rate of energy destruction in the heat exchanger.

A well-insulated, thin-walled

Hot oil 2 kg/s |150c Cold water 1.5 kg/s 2290 40C

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