Question

Estimate the rate of evaporation of liquid oxygen in( /) from a spherical container with 1.8m inner diameter covered with 30cm of asbestos insulation . The temperature of the inner and outer surfaces of the insulation are -183 and 0 respectively. The boiling point of oxygen is -183 and the latent heat of evaporation is 212.5 kj/kg. The thermal conductivity of insulation is 0.157 and 0.125w/m at 0 and -183 respectively. Assume that the thermal conductivity of the wall varies as k =k0 +( ki k0 )(00) =thermal conductivity at inner surface temperature () = thermal conductivity at outer surface temperature()

Answer 1

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