An electronic equipment is cooled by using 7 rectangular fins as seen in the figure. Details of the system are given below. Calculate the effectiveness of the finned system. Note: Fin efficiency should be calculated with an appropriate equation. Do not use graphical method. (Kanat verimini uygun denklem ile hesaplayınız, grafik kullanarak belirlemeyiniz)

An electronic equipment is cooled by using 7 rectangular fins as seen in the figure. Details of the system are given below. Calculate the effectiveness of the finned system. Note: Fin efficiency should be calculated with an appropriate equation. Do not use graphical method. (Kanat verimini uygun denklem ile hesaplayınız, grafik kullanarak belirlemeyiniz)

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter10: Heat Exchangers

Section: Chapter Questions

Problem 10.33P

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A transformer is to be cooled via forced air convection. To increase the effectiveness of thecooling, Alloy 1095 cast aluminum fins are attached to the top of the transformer overwhich air is blown (negligible thermal contact resistance between the transformer and thefins). The fins are 2 cm thick and 7 cm long and span the entire length of the transformer,and the transformer is 7 cm wide and 10 cm long. Air leaves the cooling fan at 25°C .a) Decide how to model the fins before performing any real analysis. Youare willing to accept some error in your analysis and so you will either model thefins as having adiabatic tips or being infinitely long. You expect the average convectioncoefficient over the heat transfer surfaces for this system to be around 50 W m2– K⁄ .Which tip condition should you use for the fins in your analysis? b) Modeling the transformer as being isothermal, determine the average convectioncoefficient over the heat transfer surfaces. Account for heat transfer from the…
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