An electronic chip, of cross sectional area 0.001 m², has a set of 10 fins added to it to improve heat transfer away from it to the surroundings. Each fin has a square cross section of 0.004 m by 0.004 m, and is 0.09 m long. Thermal conductivity of the fin material is 120 W/mK. The temperature of the chip is 370 K, while the temperature of the surrounding air is 300 K. The heat transfer coefficient between the fins and the surrounding air is 45 W/m2K. If the fin is assumed to behave as an infinitely long fin, fill in the following blanks. a) The heat transfer through one single fin is b) The efficiency of one single fin is c) The overall surface efficiency is W. Give your answer to 1 decimal place. %. Give your answer to zero decimal places. %. Give your answer to zero decimal places.

An electronic chip, of cross sectional area 0.001 m², has a set of 10 fins added to it to improve heat transfer away from it to the surroundings. Each fin has a square cross section of 0.004 m by 0.004 m, and is 0.09 m long. Thermal conductivity of the fin material is 120 W/mK. The temperature of the chip is 370 K, while the temperature of the surrounding air is 300 K. The heat transfer coefficient between the fins and the surrounding air is 45 W/m2K. If the fin is assumed to behave as an infinitely long fin, fill in the following blanks. a) The heat transfer through one single fin is b) The efficiency of one single fin is c) The overall surface efficiency is W. Give your answer to 1 decimal place. %. Give your answer to zero decimal places. %. Give your answer to zero decimal places.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter2: Steady Heat Conduction

Section: Chapter Questions

Problem 2.1DP

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