A 2.5-cm-diameter tube has circumferential fins of rectangular profile spaced at 9.5-mm increments along its length. The

Question:

A 2.5-cm-diameter tube has circumferential fins of rectangular profile spaced at 9.5-mm increments along its length. The fins are constructed of aluminum and are 0.8 mm thick and 12.5 mm long. The tube wall temperature is maintained at 200ºC, and the environment temperature is 93ºC. The heat-transfer coefficient is 110 W/m2 ∙ ºC. Calculate the heat loss from the tube per meter of length.