Solar irradiation of 1100 W/m2is incident on a large,flat,

Chapter 12, Problem 12.107

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Solar irradiation of 1100 W/m2is incident on a large,flat, horizontal metal roof on a day when the windblowing over the roof causes a convection heattransfer coefficient of 25 W/m2?K. The outside airtemperature is 27C, the metal surface absorptivityfor incident solar radiation is 0.60, the metal surfaceemissivity is 0.20, and the roof is well insulatedfrom below.(a) Estimate the roof temperature under steady-stateconditions.(b) Explore the effect of changes in the absorptivity,emissivity, and convection coefficient on thesteady-state temperature.

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