A spherical container of negligible thickness holding a hot fluid at 1400C and having an outer...

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A spherical container of negligible thickness holding a hot fluid at 1400°C and having an outer diameter of 0.4 m is insulated with three layers of each 50 mm thick insulation of k1 = 0.02: k2 = 0.06 and k3 = 0.16 W/mK. (Starting from inside). The outside surface temperature is 300 °C. Determine (i) the heat loss, and (ii) Interface temperatures of insulating layers. [20] A spherical container of negligible thickness holding a hot fluid at 1400°C and having an outer diameter of 0.4 m is insulated with three layers of each 50 mm thick insulation of k1 = 0.02: k2 = 0.06 and k3 = 0.16 W/mK. (Starting from inside). The outside surface temperature is 300 °C. Determine (i) the heat loss, and (ii) Interface temperatures of insulating layers. [20]