The wedge-shaped cavity shown in the accompanying sketch consists of two long strips joined along one edge. Surface 1 is 1 m wide and has an emittance of 0.4 and a temperature of 1000 K. The other wall has a temperature of 600 K. Assuming gray diffuse processes and uniform flux distribution; calculate the rate of energy loss from surface 1 and 2 per meter length.

GIVEN

• The wedge shaped cavity shown above
• Width of A₁ (W₁) = 1 m
• Emittance of A₁ (ε₁) = 0.4
• Temperature of A₁ (T₁) = 1000 K
• Temperature of A₂ (T₂) = 600 K
• A₂ is black

ASSUMPTIONS

• Enclosure temperature (T_e) = 0 K
• Gray diffuse processes
• Uniform flux distribution

Transcribed Image Text:

A2, T2= 600 K 45° C,d A1, T = 1000 K