The addition of aluminum fins has been suggested to increase the rate of heat dissipation from one side of an electronic device 1m wide and 1 m tall. The fins are to be rectangular in cross section, 2.5 cm long and 0.25 cm thick, as shown in the figure. There are to be 100 fins per meter. The convection heat transfer coefficient, both for the wall and the fins, is estimated to be 35 W/m² K. With this infor- mation determine the percent increase in the rate of heat transfer of the finned wall compared to the bare wall.

The addition of aluminum fins has been suggested to increase the rate of heat dissipation from one side of an electronic device 1m wide and 1 m tall. The fins are to be rectangular in cross section, 2.5 cm long and 0.25 cm thick, as shown in the figure. There are to be 100 fins per meter. The convection heat transfer coefficient, both for the wall and the fins, is estimated to be 35 W/m² K. With this infor- mation determine the percent increase in the rate of heat transfer of the finned wall compared to the bare wall.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

The addition of aluminum fins has been suggested to
increase the rate of heat dissipation from one side of an
electronic device 1 m wide and 1 m tall. The fins are to be
rectangular in cross section, 2.5 cm long and 0.25 cm thick,
as shown in the figure. There are to be 100 fins per meter.
The convection heat transfer coefficient, both for the wall
and the fins, is estimated to be 35 W/m2 K. With this infor-
mation determine the percent increase in the rate of heat
transfer of the finned wall compared to the bare wall.
Fin
100 fins
1 m
Insulation
1= 0.25 cm
2.5 cm

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