15) An aluminium block is cast with an array of pin fins protruding on the base as shown in figure, subjected to room air at 20°C. The convection coefficient between the pins and the surrounding air may be assumed to be h = 13.2 W/m² °C. The pin diameters are 2 mm and their length 25 mm. The base of the aluminium block may be assumed constant at 70°C. Calculate the total heat lost by an array of 15 by 15, that is, 225 fins.

15) An aluminium block is cast with an array of pin fins protruding on the base as shown in figure, subjected to room air at 20°C. The convection coefficient between the pins and the surrounding air may be assumed to be h = 13.2 W/m² °C. The pin diameters are 2 mm and their length 25 mm. The base of the aluminium block may be assumed constant at 70°C. Calculate the total heat lost by an array of 15 by 15, that is, 225 fins.

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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