Reconsider Prob. 1759. Using an appropriate software, plot the rate of heat transfer through the wall as

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Reconsider Prob. 17€“59. Using an appropriate software, plot the rate of heat transfer through the wall as a function of the thickness of the rigid foam in the range of 1 cm to 10 cm. Discuss the results.

Data from 17-59.

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.

Foam -Plaster t1.5 cm 30 ст Brick 1.5 cm lgk-18 cm -

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Fundamentals of Thermal-Fluid Sciences

ISBN: 978-0078027680

5th edition

Authors: Yunus A. Cengel, Robert H. Turner, John M. Cimbala

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