Answered: tion heat transfer coefficients on the…

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 6-m-high and 10-m-wide wall consists of a long 20-cm x 35-cm cross section of horizontal bricks (k = 0.72 W/m · °C) separated by 4-cm-thick plaster layers (k = 0.22 W/m · °C). There are also 3-cm-thick plaster layers on each side of the wall, and a 4-cm-thick rigid foam (k = 0.026 W/m · °C) on the inner side of the wall. The indoor and the outdoor temperatures are 25°C and -2°C, and the convection heat transfer coefficients on the inner and the outer sides are h1 = 12 W/m2 · °C and h2 = 20 W/m2 · °C, respectively. Assuming one-dimensional heat transfer and disregarding radiation, determine the rate of heat transfer through the wall.

Foam
Plaster
2 cm
Brick
35 cm
2 cm
20 cm
4
3
3

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