steel pipe, 6 m in length with an outside diameter of 4 inches and a thermal conductivity of 65 W/mK has an exterior surface temperature of 200oC. The pipe is to be wrapped with two types of insulation: 2 inches Celotex (k = 0.1 W/mK) and 2 inches Asbestos (k = 0.80 W/mK). The insulated pipe system is in ambient air at a temperature of 15oC and heat transfer coefficient of 10 W/m2K. 1. Make a schematic description of the system. 2. State what is given and what are the assumptions. 3. Determine the rate of heat transfer if the celotex is the layer closest to the pipe. 4. Determine the rate of heat transfer if the asbestos is the layer closest to the pipe. 5. Why does the rate of heat transfer change between the two cases? 6. Consider the case where the pipe is just wrapped in asbestos. Determine the rate of heat transfer, heat flux at the exterior asbestos surface for 1.0 inches of asbestos. 7. How will the rate of heat transfer change if we increase the asbestos thickness? 1