An opaque surface, 2 m 2 m, is maintained at 400 Kand is

Chapter 12, Problem 12.52

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An opaque surface, 2 m ?2 m, is maintained at 400 Kand is simultaneously exposed to solar irradiation withGS?1200 W/m2. The surface is diffuse and its spec-tral absorptivity is ???0, 0.8, 0, and 0.9 for 0?0.5?m, 0.5?m??1?m, 1?m??2 ?m, and??2?m, respectively. Determine the absorbed irra-diation, emissive power, radiosity, and net radiationheat transfer from the surface.

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