Hot oil is to be cooled in a double-tube counter-flow heat exchanger. The copper inner tubes have a diameter of 2 cm and negligible thickness. The inner diameter of the outer tube (the shell) is 3 cm. Water flows through the tube at a rate of 0.5 kg/s, and the oil through the shell at a rate of 0.8 kg/s. Taking the average temperatures of the water and the oil to be 45°C and 80°C, respectively, determine the overall heat transfer coefficient of this heat exchanger.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Hot oil is to be cooled in a double-tube counter-flow heat exchanger. The
copper inner tubes have a diameter of 2 cm and negligible thickness. The
inner diameter of the outer tube (the shell) is 3 cm. Water flows through
the tube at a rate of 0.5 kg/s, and the oil through the shell at a rate of
0.8 kg/s. Taking the average temperatures of the water and the oil to be
45°C and 80°C, respectively, determine the overall heat transfer coefficient
of this heat exchanger.

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