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A plane wall (0.8 m x 0.6 m) at 10 oC is to be heated by attaching 7-cm-long, 3-mm-diameter pin fins  (k=200 W/mK, ρ=5000 kg/m3 ) to it. nfin=200 fins are to be used in total. Temperature of the surrounding fluid is 100 oC, and  the heat transfer coefficient on the surfaces is 35 W/m2K. Total (material + manufacturing) cost of the fins is  850 TL/kg. Fill the table below by neglecting heat transfer from the fin tips. nfin=? a)  Fin efficiency b)  Fin effectiveness c)  Overall fin effectiveness d)  Total cost of fins

A plane wall (0.8 m x 0.6 m) at 10 oC is to be heated by attaching 7-cm-long, 3-mm-diameter pin fins  (k=200 W/mK, ρ=5000 kg/m3 ) to it. nfin=200 fins are to be used in total. Temperature of the surrounding fluid is 100 oC, and  the heat transfer coefficient on the surfaces is 35 W/m2K. Total (material + manufacturing) cost of the fins is  850 TL/kg. Fill the table below by neglecting heat transfer from the fin tips. nfin=? a)  Fin efficiency b)  Fin effectiveness c)  Overall fin effectiveness d)  Total cost of fins

Elements Of Electromagnetics
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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A plane wall (0.8 m x 0.6 m) at 10 oC is to be heated by attaching 7-cm-long, 3-mm-diameter pin fins 
(k=200 W/mK, ρ=5000 kg/m3
) to it. nfin=200 fins are to be used in total. Temperature of the surrounding fluid is 100 oC, and 
the heat transfer coefficient on the surfaces is 35 W/m2K. Total (material + manufacturing) cost of the fins is 
850 TL/kg. Fill the table below by neglecting heat transfer from the fin tips.

nfin=?

a)  Fin efficiency

b)  Fin effectiveness

c)  Overall fin effectiveness

d)  Total cost of fins

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