The wall of a building consists of a 360-mm thick layer A which has a thermal conductivity, kA - 4.9 W/m-K, followed by a 80-mm thick second layer, layer B, which has a thermal conductivity, kg = 0.9 W/m-K. The inside and outside convection coefficients are 20 W/m² K and 39 W/m2 K. At these conditions, what is the overall heat transfer coefficient for this composite wall? Express your answer in W/m^2 K.
The wall of a building consists of a 360-mm thick layer A which has a thermal conductivity, kA - 4.9 W/m-K, followed by a 80-mm thick second layer, layer B, which has a thermal conductivity, kg = 0.9 W/m-K. The inside and outside convection coefficients are 20 W/m² K and 39 W/m2 K. At these conditions, what is the overall heat transfer coefficient for this composite wall? Express your answer in W/m^2 K.
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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15. The wall of a building consists of a 360-mm thick layer A which has a thermal conductivity, kA - 4.9 W/m-K, followed by a 80-mm thick second layer, layer B, which has a thermal conductivity, kg = 0.9 W/m-K. The inside and outside convection coefficients are 20 W/m² K and 39 W/m2 K. At these conditions, what is the overall heat transfer coefficient for this composite wall? Express your answer in W/m^2 K.
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