A hollow spherical container of negligible thickness is subjected to uniform heat rate of 30 W...

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A hollow spherical container of negligible thickness is subjected to uniform heat rate of 30 W from the inside surface, while the outside surface is subjected to convection and radiation heat transfer. The sphere has an outer diameter of 0.4 m insulated with three layers each 50 mm thick insulation of k₁ = 0.02: k₂ = 0.06 and k3 = 0.1 W/mK. (Starting from inside). The outside room temperature is 20°C and h = 25 W/m2 K and the emissivity € = 0.5. Determined the inside temperature of the sphere as well as the Interface temperatures of insulating layers. [20] A hollow spherical container of negligible thickness is subjected to uniform heat rate of 30 W from the inside surface, while the outside surface is subjected to convection and radiation heat transfer. The sphere has an outer diameter of 0.4 m insulated with three layers each 50 mm thick insulation of k₁ = 0.02: k₂ = 0.06 and k3 = 0.1 W/mK. (Starting from inside). The outside room temperature is 20°C and h = 25 W/m2 K and the emissivity € = 0.5. Determined the inside temperature of the sphere as well as the Interface temperatures of insulating layers. [20]

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Given k 002 WmK k006 Wmk 01 Wmk At outer surface Q combined 7 To 30 436x108 R convection ... View the full answer