Solved: Evaluate the length required for the heal exchanger, Mechanical Engineering

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Evaluate the length required for the heal exchanger

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Q: A concentric tube heat exchanger for cooling lubricating 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 counter flow 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 heal exchanger.

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Mechanical Engineering: Evaluate the length required for the heal exchanger

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