H.W. Q:A hot surface at 100°C is to be cooled by attach- ing 3-cm-long, 0.25-cm-diameter aluminum pin fins (k = 237 W/m · °C) to it, with a center-to-center distance of 0.6 cm. The temperature of the surrounding medium is 30°C, and the heat transfer coefficient on the surfaces is 35 W/m2 °C. Determine the rate of heat transfer from the surface for a 1-m X 1-m section of the plate. Also determine the overall effectivenegs of the fins. Ans. Q=17.4 kW, Efin = 7.1 %3D

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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H.W.
Q:A hot surface at 100°C is to be cooled by attach-
ing 3-cm-long, 0.25-cm-diameter aluminum pin fins (k
237 W/m - °C) to it, with a center-to-center distançe of 0.6 cm.
The temperature of the surrounding medium is 30°C, and the
heat transfer coefficient on the surfaces is 35 W/m2 · °C.
Determine the rate of heat transfer from the surface for a
1-m x 1-m section of the plate. Also determine the overall
effectiveners of the fins. Ans. Q=17.4 kW , E fin = 7.1
3 сm
0.6
cm
0.25
cm
Transcribed Image Text:H.W. Q:A hot surface at 100°C is to be cooled by attach- ing 3-cm-long, 0.25-cm-diameter aluminum pin fins (k 237 W/m - °C) to it, with a center-to-center distançe of 0.6 cm. The temperature of the surrounding medium is 30°C, and the heat transfer coefficient on the surfaces is 35 W/m2 · °C. Determine the rate of heat transfer from the surface for a 1-m x 1-m section of the plate. Also determine the overall effectiveners of the fins. Ans. Q=17.4 kW , E fin = 7.1 3 сm 0.6 cm 0.25 cm
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