If in Problem 15.17, the lower surface of the plate is exposed to air with a convective heat-transfer coefficient of 3 Btu/h ft °F, what steady-state temperature will be reached
a. if radiant emission from the plate is neglected?
b. if radiant emission from the top surface of the plate is accounted for?
Problem 15.17
The solar radiation incident on a steel plate 2 ft square is 400 Btu/h. The plate is 1.4 in. thick and lying horizontally on an insulating surface, its upper surface being exposed to air at 90°F. If the convective heat-transfer coefficient between the top surface and the surrounding air is 4 Btu/h ft °F, what will be the steady-state temperature of the plate?
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