Two black surfaces, AB and BC, of lengths 5 m and 6 m, respectively, are oriented as shown. Both surfaces extend infinitely into the third dimension. Given that view factor F 12 = 0.5, T 1 = 800 K, T 2 = 600 K, T surrounding = 300 K and Stefan Boltzmann constant, σ = 5.67 × 10 -8 W / (m 2 K 4 ), the heat transfer rate from Surface 2 to the surrounding environment is ________kW.

GATE Mechanical Engineering (ME) 2017 Shift 1 Solved Paper

Question : 47 of 65

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Two black surfaces, AB and BC, of lengths 5 m and 6 m, respectively, are oriented as shown. Both surfaces extend infinitely into the third dimension. Given that view factor F₁₂ = 0.5, T₁ = 800 K, T₂ = 600 K, T_surrounding = 300 K and Stefan Boltzmann constant, σ = 5.67 × 10^-8 W / (m² K⁴), the heat transfer rate from Surface 2 to the surrounding environment is ________kW.

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