(Solved): 20.6 Consider a 3m\times 3m\times 3m cubical furnace whose top and side surfaces closely approximate ...

20.6 Consider a

cubical furnace whose top and side surfaces closely approximate black surfaces and whose base surface has an emissivity of 0.8. The base, top and side surfaces of the furnace are maintained at uniform temperatures of

, and

, respectively. Determine a) The net rate of radiation heat transfer between the base and side surfaces. (Answer: -996 W) b) The net rate of radiation heat transfer between the base and top surface. (Answer: -139 kW ) c) The net rate of radiation heat transfer to the base surface. (Answer: -1135 kW )