Two concentric spheres of diameter D₁ = 0.9 m and D₂ = 1.2 m are separated by an air space and have surface temperatures of T₁ = 400 K and T₂ = 300 K. (a) If the surfaces are black, what is the net rate of radiation exchange between the spheres, in W? 912 = i W (b) What is the net rate of radiation exchange between the surfaces if they are diffuse and gray with ₁ = 0.5 and 82 0.05, in W? 912 = W (c) What is the net rate of radiation exchange if D₂ is increased to 20 m, with 2 = 0.05, ₁ = 0.5, and D₁ = 0.9 m, in W? 912 = W (d) What is the net rate of radiation exchange if the larger sphere behaves as a black body (2 = 1.0) and with &1 = 0.5, D₂ = 20 m, and D₁ = 0.9 m, in W? 912 = W
Two concentric spheres of diameter D1= 0.9 m and D2= 1.2 m are separated by an air space and have surface temperatures of T1= 400 K and T2= 300 K. (a) If the surfaces are black, what is the net rate of radiation exchange between the spheres, in W? q12= Enter your answer for part
(a) in accordance to the question statement W (b) What is the net rate of radiation exchange between the surfaces if they are diffuse and gray with ε1= 0.5 and ε2= 0.05, in W? q12= Enter your answer for part
(b) in accordance to the question statement W (c) What is the net rate of radiation exchange if D2 is increased to 20 m, with ε2= 0.05, ε1= 0.5, and D1= 0.9 m, in W? q12= Enter your answer for part
(c) in accordance to the question statement W (d) What is the net rate of radiation exchange if the larger sphere behaves as a black body (ε2= 1.0) and with ε1= 0.5, D2= 20 m, and D1= 0.9 m, in W? q12= Enter your answer for part
(d) in accordance to the question statement W
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 4 images
