(Solution Download) A vertical cylinder 6 ft tall and 1 ft in diameter might be used to approximate a man for...

A vertical cylinder 6 ft tall and 1 ft in diameter might be used to approximate a man for heat-transfer purposes. Suppose the surface temperature of the cylinder is 78?F, h=2 Btu/h · ft2 · ?F, the surface emissivity is 0.9, and the cylinder is placed in a large room where the air temperature is 68?F and the wall temperature is 45?F. Calculate the heat lost from the cylinder. Repeat for a wall temperature of 80?F. What do you conclude from these calculations?