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(Solved): Exercise 2 A pipe with i.d. =52mm and 0. d. =60mm has eight rectangular longitudinal fins welded to ...



Exercise 2 A pipe with i.d. =52mm and 0. d. =60mm has eight rectangular longitudinal fins welded to the outer surface. The fins are of 5 cm length and 1.6 mm thickness. The wall temperature of the pipe is 160\deg C. The finned tube loses heat to a flowing stream of air with a surface heat transfer coefficient of 115(W)/(m^(2)).\deg C. The thermal conductivity of the fin material is 46(W)/(m).\deg C. Neglecting heat transfer from the edges of the fins, calculate (a) the fin efficiency, and (b) the rate of heat transfer to the air per meter length of the finned pipe. Take the temperature of the atmospheric air 25\deg C.


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