Consider a 25-m-long thick-walled concrete duct (k 5 0.75 W/m·K) of square cross section. The outer dimensions of the duct are 20 cm 3 20 cm, and the thickness of the duct wall is 2 cm. If the inner and outer surfaces of the duct are at 100°C and 30°C, respectively, determine the rate of heat transfer through the walls of the duct.
Consider a 25-m-long thick-walled concrete duct (k 5 0.75 W/m·K) of square cross section. The outer dimensions of the duct are 20 cm 3 20 cm, and the thickness of the duct wall is 2 cm. If the inner and outer surfaces of the duct are at 100°C and 30°C, respectively, determine the rate of heat transfer through the walls of the duct.
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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Consider a 25-m-long thick-walled concrete duct (k 5
0.75 W/m·K) of square cross section. The outer dimensions
of the duct are 20 cm 3 20 cm, and the thickness of the duct
wall is 2 cm. If the inner and outer surfaces of the duct are at
100°C and 30°C, respectively, determine the rate of heat transfer
through the walls of the duct.
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