A 4-m-high and 6-m-wide wall consists of a long18-cm * 30-cm cross section of horizontal bricks (k =0.72 W/m·K) separated by 3-cm-thick plaster layers (k =0.22 W/m·K). There are also 2-cm-thick plaster layers on eachside of the wall, and a 2-cm-thick rigid foam (k = 0.026 W/m·K)on the inner side of the wall. The indoor and the outdoor temperaturesare 22°C and 24°C, and the convection heat transfercoefficients on the inner and the outer sides are h1 = 10 W/m2·Kand h2 = 20 W/m2·K, respectively. Assuming one-dimensionalheat transfer and disregarding radiation, determine the rate ofheat transfer through the wall.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A 4-m-high and 6-m-wide wall consists of a long
18-cm * 30-cm cross section of horizontal bricks (k =
0.72 W/m·K) separated by 3-cm-thick plaster layers (k =
0.22 W/m·K). There are also 2-cm-thick plaster layers on each
side of the wall, and a 2-cm-thick rigid foam (k = 0.026 W/m·K)
on the inner side of the wall. The indoor and the outdoor temperatures
are 22°C and 24°C, and the convection heat transfer
coefficients on the inner and the outer sides are h1 = 10 W/m2·K
and h2 = 20 W/m2·K, respectively. Assuming one-dimensional
heat transfer and disregarding radiation, determine the rate of
heat transfer through the wall.

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