Answered: 3 – m high and 5 – m wide wall consists…

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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A 3 – m high and 5 – m wide wall consists of 16 – cm by 22 – cm cross section 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 brick and a 3 – cm thick
rigid foam (k = 0.026 W/m – K) on the inner side of the wall. The indoor and outdoor
temperatures are 20 oC and -10 oC, respectively and the convection heat transfer
coefficients on the inner and outer sides are h1 = 10 W/m2 – K and h2 = 25 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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