1. A pipe passes through a room in which the surrounding air is at 22 C. The diameter of the pipe is 200 mm, the length of the pipe is 3metersand its surface temperature is 250C and the emissivity of the surface is 0.9

1. What is the surface emissive power (radiation heat loss)?
2. If convection heat transfer coefficient from the surface to the air is 20 W/m².K, what is the rate of heat loss from the surface of pipe by convection? C.Total heat loss from the surface of the pipe per unit length