Consider a thin opaque, horizontal plate with an
Chapter , Problem 12.127(choose chapter or problem)
Consider a thin opaque, horizontal plate with an electrical heater on its backside. The front side is exposed to ambient air that is at 20 C and provides a convection heat transfer coefficient of 10 W/m2 K, solar irradiation of 600 W/m2 , and an effective sky temperature of 40 C. What is the electrical power (W/m2 ) required to maintain the plate surface temperature at Ts 60 C if the plate is diffuse and has the designated spectral, hemispherical reflectivity?
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