Total heat transfer and the outlet temperature

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Reference no: EM13946501

A concentric tube heat exchanger for cooling lubri- cating oil is comprised of a thin-walled inner tube of 25-mm diameter carrying water and an outer tube of 45-mm diameter carrying the oil. The exchanger operates in counterflow with an overall heat transfer coefficient of 60 W/m2 · K and the tabulated average properties.

(a) If the outlet temperature of the oil is 60°C, determine the total heat transfer and the outlet temperature of the water.

(b) Determine the length required for the heat exchanger.

Reference no: EM13946501

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