Two perfectly black surfaces are constructed so that all the radiant energy leaving a surface at...

Question

Two perfectly black surfaces are constructed so that all the radiant energy leaving a surface at 800oC reaches the other surface. The temperature of the other surface is maintained at 250oC. Calculate the heat transfer between the surfaces per hour and per unit area of the surface maintained at 800OC.

David · Accepted Answer

Solution:- 
To calculate the heat transfer between the surface per hour and per unit area of the surface 
Maintained at 800℃, proceed as follows: 
Calculate Heat transfer between the surfaces using the formula below: 
4 4
1 2
1
2
4 4
1 2
( )....(1)
;
800 273
1073
250 273
523
exp (1) ;

Two perfectly black surfaces are constructed so that all the radiant energy leaving a surface at 800 o C reaches the other surface. The temperature of the other surface is maintained at 250oC....

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