Two convex objects are inside a large vacuum enclosure whose walls are maintained at T 3 300 K The objects have the same area, 0 2 m 2 , and the same emissivity, 0 2 The view factor from object 1 to object 2 is F 12 0 3 Embedded in object 2 is a heater that generates 400 W The temperature of object...

Calculation The heat transfer rate from object 1 to object 2 is given by q12 1A1T14 T24F12 where 1 i ...

Two convex objects are inside a large vacuum enclosure whose walls are maintained at T 3 =

Question:

Two convex objects are inside a large vacuum enclosure whose walls are maintained at T₃= 300 K. The objects have the same area, 0.2 m², and the same emissivity, 0.2. The view factor from object 1 to object 2 is F₁₂= 0.3. Embedded in object 2 is a heater that generates 400 W. The temperature of object 1 is maintained at T₁= 200 K by circulating a fluid through channels machined into it. At what rate must heat be supplied (or removed) by the fluid to maintain the desired temperature of object 1? What is the temperature of object 2?

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