A certain building wall consists of 0.15 m of concrete [K = 0.15W / m * K] 0.15 m of fiber glass insulation and 10 mm of gypsum board IK = 0.15 W/mK]. The inside and outside convection coefficients are 10 and 40W / (m ^ 2) * K respectively. The outside air temperature is - 6 degrees * C and the inside temperature is 22 degrees * C Calculate the overall heat transfer coefficient for the wall, the R value, and the heat loss per area. %3D

A certain building wall consists of 0.15 m of concrete [K = 0.15W / m * K] 0.15 m of fiber glass insulation and 10 mm of gypsum board IK = 0.15 W/mK]. The inside and outside convection coefficients are 10 and 40W / (m ^ 2) * K respectively. The outside air temperature is - 6 degrees * C and the inside temperature is 22 degrees * C Calculate the overall heat transfer coefficient for the wall, the R value, and the heat loss per area. %3D

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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Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

Question

A certain building wall consists of 0.15 m of
concrete [K = 0.15W / m * K 0.15 m of fiber glass
insulation and 10 mm of gypsum board IK = 0.15
W/mK]. The inside and outside convection
coefficients are 10 and 40W / (m ^ 2) * K
respectively. The outside air temperature is - 6
degrees * C and the inside temperature is 22
degrees * C Calculate the overall heat transfer
coefficient for the wall, the R value, and the heat
loss per area.
%3D

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