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    Standford
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Category > Applied Sciences Posted 06 May 2017 My Price 8.00

 Consider an opaque

12.72   Consider an opaque, diffuse surface whose spectral reflectivity varies with wavelength as shown. The sur- face is at 750 K, and irradiation on one side varies with wavelength as shown. The other side of the surface is insulated.

 

 

p = 0 for irradiation originating from the furnace. The material has an emissivity of 0.8 and is opaque to irradi- ation from a source at room temperature. The outer sur- face of the cover is exposed to surroundings and ambient air at 27°C with a convection heat transfer coefficient of

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 
 

50 W/m2 · K. Assuming that convection effects on    the

 

 

0.6

 

Text Box: rl0.4

 

0.2

 

0

 

 

 

 

 

 

 

0    1    2    3   4

l (mm)

500

 

 

 

 

 

Text Box: Gl(W/m2•mm)0

0

 

 

 

 

 

 

 

1   2   3   4   5   6   7    8

l (mm)

inner surface of the cover are negligible, calculate the heat loss by the furnace and the temperature of the cover.

 

Answers

IT KING
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Status NEW Posted 06 May 2017 10:05 AM My Price 8.00

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