Repeat Problem 2-124 for aluminum fins installed on a copper tube. Problem 2-124 A tube assembly is
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Problem 2-124
A tube assembly is constructed of copper with an inside diameter of 1.25 cm, wall thickness of 0.8 mm, and circumferential fins around the periphery. The fins have a thickness of 0.3 mm and length of 3 mm, and are spaced 6 mm apart. If the convection heat transfer coefficient from the tube and fins to the surrounding air is 50 W/m2 · ºC, calculate the thermal resistance for a 30-cm length of the tube-fin combination. What is the fin efficiency for this arrangement? If the inside tube temperature is 100ºC and the surrounding air temperature is 20ºC, what is the heat loss per meter of tube length? What fraction of the loss is by the fins?
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n f 096 For 6mm lenth Rt...View the full answer
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