Heat is being transferred from water to air through a brass wall having thermal conductivity of 75

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Heat is being transferred from water to air through a brass wall having thermal conductivity of 75 W/mK. The size of brass wall is 0.5 m x 0.5 m. The mean temperature of wall and air are 90o C and 30o C, respectively. It is desired to increase the heat transfer rate by adding rectangular brass fins 1 mm thick, 25 mm in length and pitched 10 mm apart (center to center). The convective heat transfer coefficient between the wall and the air is 15 W/m2 K.

a. Calculate the increase in the heat transfer from the wall as a result of adding fins. neglect heat loss from the tip.

b. Determine the overall effectiveness of the fins.

Posted Date: Dec 05, 2021 05:05 PM

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Heat is being transferred from water to air through a brass wall having thermal conductivity of 75

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Solutionm Tm Air 30 Gtivert k 15 wmk xb V 12 m V4 Tm wall 90 fins tuickness L 25 ... View the full answer

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