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Hot water at 85°C flows through a thin-walled copper tube of 30mm diameter The tube is enclosed by an eccentric cylindrical shell that is maintained at 35°C and has a diameter of 120 mm

Hot water at 85°C flows through a thin-walled copper tube of 30-mm diameter. The tube is enclosed by an eccentric cylindrical shell that is maintained at 35°C and has a diameter of 120 mm. The eccentricity, defined as the separation between the centers of the tube and shell, is 20 mm. The space between the tube and shell is filled with an insulating material having a thermal conductivity of 0.05 W/m ∙ K. Calculate the heat loss per unit length of the tube, and compare the result with the heat loss for a concentric arrangement.

 

Jun 27 2020 View more View Less

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