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GATE ME 2017 Set 1 — Question 37

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NAT+2 / -0HardView FactorsRadiationHeat TransferRadiation Exchange

Heat Transfer → Radiation → Radiation Exchange

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Two black surfaces, AB and BC, of lengths 5 m5\text{ m} and 6 m6\text{ m}, respectively, are oriented as shown. Both surfaces extend infinitely into the third dimension. Given that view factor F12=0.5F_{12} = 0.5, T1=800 KT_1 = 800\text{ K}, T2=600 KT_2 = 600\text{ K}, Tsurrounding=300 KT_{\text{surrounding}} = 300\text{ K} and Stefan Boltzmann constant, σ=5.67×10−8 W/(m2K4)\sigma = 5.67 \times 10^{-8}\text{ W}/(\text{m}^2\text{K}^4), the heat transfer rate from Surface 2 to the surrounding environment is ________ kW.
Diagram showing two black surfaces AB and BC and the surrounding environment

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