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Consider an array of vertical rectangular fins which is to be used to cool an electronic device mounted in quiescent atmospheric air at

Consider an array of vertical rectangular fins, which is to be used to cool an electronic device mounted in quiescent, atmospheric air at T = 27°C. Each fin has L = 20 mm and H = 150 mm and operates at an approximately uniform temperature of Ts = 77°C.

 

(a) Viewing each fin surface as a vertical plate in an infinite, quiescent medium, briefly describe why there exists an optimum fin spacing S. Using Figure 9.4, estimate the optimum value of S for the prescribed conditions.

(b) For the optimum value of S and a fin thickness of t = 1.5 mm, estimate the rate of heat transfer from the fins for an array of width W


 355 mm

 

Jul 23 2020 View more View Less

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