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m x 70 mm plate is cooled by convection heat transfer to ambient air To = 35°C and h = 75 W/m² °C. The temperature of the plate (T) is 90°C

m x 70 mm plate is cooled by convection heat transfer to ambient air To = 35°C and h = 75 W/m² °C. The temperature of the plate (T) is 90°C

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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Heat Transfer for Mechanical Engineering Problem 7/4 A 70 mm x 70 mm plate is cooled by convection heat transfer to ambient air having To = 35°C and h = 75 W/m². °C. The temperature of the plate (Tb) is 90°C. In order to increase heat transfer, 49 conical fins are attached to the surface of the chip. The diameter (D) at the fin base 3 mm. The fin length (L) is 25 mm. Assume that the thermal conductivity of the fin is 300 W/m. °C. Find the total heat transfer from the plate to air. ^^^^^^^ Tb To, h
Transcribed Image Text:Heat Transfer for Mechanical Engineering Problem 7/4 A 70 mm x 70 mm plate is cooled by convection heat transfer to ambient air having To = 35°C and h = 75 W/m². °C. The temperature of the plate (Tb) is 90°C. In order to increase heat transfer, 49 conical fins are attached to the surface of the chip. The diameter (D) at the fin base 3 mm. The fin length (L) is 25 mm. Assume that the thermal conductivity of the fin is 300 W/m. °C. Find the total heat transfer from the plate to air. ^^^^^^^ Tb To, h
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