A hot surface at 250°C is to be cooled by attaching straight aluminum rectangular fins (k = 240 W/m•K) with 25 mm length, 50 mm width and 4 mm base thickness. Fins are exposed to an ambient air condition of 30°C and heat transfer coefficient is 40 W/m²-K. If there are 2000 fins per m² surface area, calculate; a. The heat transfer rate from a single fin. b. The increase in the rate of heat transfer per m? surface area as a result of attaching 2000 fins. c. Determine the overall effectiveness of the fins.

A hot surface at 250°C is to be cooled by attaching straight aluminum rectangular fins (k = 240 W/m•K) with 25 mm length, 50 mm width and 4 mm base thickness. Fins are exposed to an ambient air condition of 30°C and heat transfer coefficient is 40 W/m²-K. If there are 2000 fins per m² surface area, calculate; a. The heat transfer rate from a single fin. b. The increase in the rate of heat transfer per m? surface area as a result of attaching 2000 fins. c. Determine the overall effectiveness of the 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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