Determine the rate of heat loss in Btu/h from the wall of a building in a 10-mph wind blowing parallel to its surface. The wall is 80 ft long, 20 ft high, its surface temperature is 80?F, and the temperature of the ambient air is 40?F.GIVENThe wall of a building with wind blowing parallel to its surfaceWind speed (U??) = 10 mph = 5.28 × 104 ft/hrLength of wall (L) = 80 ftHeight of wall (H) = 20 ftSurface temperature (Tw) = 80?FAmbient air temperature (T??) = 40?FASSUMPTIONSSteady stateThere is negligible moisture in the airThe wind blows along the length of the wall and parallel to itRadiative loss isnegligible

Transcribed Image Text:

T- 80°F 20 ft U= 10 mph T.- 40°F 80 ft