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GATE ME 2016 Set 1 — Question 53

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NAT+2 / -0MediumView FactorsRadiationHeat TransferRadiation Exchange

Heat Transfer → Radiation → Radiation Exchange

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Question

An infinitely long furnace of 0.5 m×0.4 m0.5\text{ m} \times 0.4\text{ m} cross-section is shown in the figure below. Consider all surfaces of the furnace to be black. The top and bottom walls are maintained at temperature T1=T3=927∘CT_1 = T_3 = 927^\circ\text{C} while the side walls are at temperature T2=T4=527∘CT_2 = T_4 = 527^\circ\text{C}. The view factor, F1−2F_{1-2} is 0.260.26. The net radiation heat loss or gain on side 1 is_________ W/m.
Stefan-Boltzmann constant =5.67×10−8 W/m2-K4= 5.67 \times 10^{-8}\text{ W/m}^2\text{-K}^4
Cross-section of a rectangular furnace with sides labeled 1 to 4 and their respective temperatures
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