Engineering, 16.10.2020 14:01 angeljaylyn123

Two pipes with length, thickness and outer diameter of 4 m, 0.4 cm and 10 cm, respectively, are used for transporting superheated vapor in a manufacturing plant. The pipes with thermal conductivity of 55 W/m. K are connected to each other through two 1-cm-thick flanges of outer diameter 19 cm. The superheated vapor flows inside the pipe at an average temperature of 483 K with a heat transfer coefficient of 180 W/m^2 .K. Air condition surrounding the pipes has a temperature of 283 K and a convection heat transfer coefficient of 25 W/m^2 .K. Required:
a. Determine the average outer surface temperature of the pipe, disregarding the flanges.
b. Considering the flanges as the fins and using this temperature for the base of the flange, determine the fin efficiency and the rate of heat transfer from the flanges.

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Two pipes with length, thickness and outer diameter of 4 m, 0.4 cm and 10 cm, respectively, are used...

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