A solar collector consists of a long duct through which
Chapter , Problem 13.79(choose chapter or problem)
A solar collector consists of a long duct through which air is blown; its cross section forms an equilateral triangle 1 m on a side. One side consists of a glass cover of emissivity 1 0.9, while the other two sides are absorber plates with 2 3 1.0. During operation the surface temperatures are known to be T1 25C, T2 60C, and T3 70C. What is the net rate at which radiation is transferred to the cover due to exchange with the absorber plates? 13.8
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