The emissivity of galvanized steel sheet, a common roofing material, is = 0.13 at temperatures around

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The emissivity of galvanized steel sheet, a common roofing material, is ϵ = 0.13 at temperatures around 300 K, while its absorptivity for solar irradiation is α= 0.65. Would the neighborhood cat be comfortable walking on a roof constructed of the material on a day when G= 750 W/m2, T∞ = 16°C, and h = 7 W/m2  · K? Assume the bottom surface of the steel is insulated.

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Fundamentals Of Heat And Mass Transfer

ISBN: 9780470501979

7th Edition

Authors: Theodore L. Bergman, Adrienne S. Lavine, Frank P. Incropera, David P. DeWitt

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