A 200 ft. high by 60 ft. wide building is on fire, and one of its walls is at 1500ºF. Air at 100ºF and 40% relative humidity is near the building as shown in the figure. Estimate the net heat transfer to the air from this burning wall if the wall’s emissivity is 0.85.


As a first approximation, assume a two surface problem; the air and the burning building wall. An equivalent circuit is sketched.



Physics & Space Science

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