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A cylindrical tank containing liquid oxygen (latent heat of vaporization = 2.1 x 10% W.s/kg) with a 2.0 m diameter is enclosed inside a cylindrical container of inside diameter 2.25 m. Both tanks are 1 m in height. The space between the tanks is evacuated to reduce the heat transfer to the oxygen. The oxygen tank is at 100K whereas the outer tank is at 300K. The surfaces have an emissivity of 0.1. (a)Show the heat circuit related with problem. (5 Marks) (b) Calculate the heat transfer rate to the oxygen by radiation and the rate of evaporation of oxygen. (8 Marks) (c) If a radiation shield of diameter 2.15 m with emissivity 0.05 at both its surfaces is installed between the oxygen tank and the outer tank, draw the thermal circuit. (5 Marks) (d) Calculate the heat transfer to the oxygen and the reduction in heat transfer due to the presence of the radiation shield. (7 Marks) A cylindrical tank containing liquid oxygen (latent heat of vaporization = 2.1 x 10% W.s/kg) with a 2.0 m diameter is enclosed inside a cylindrical container of inside diameter 2.25 m. Both tanks are 1 m in height. The space between the tanks is evacuated to reduce the heat transfer to the oxygen. The oxygen tank is at 100K whereas the outer tank is at 300K. The surfaces have an emissivity of 0.1. (a)Show the heat circuit related with problem. (5 Marks) (b) Calculate the heat transfer rate to the oxygen by radiation and the rate of evaporation of oxygen. (8 Marks) (c) If a radiation shield of diameter 2.15 m with emissivity 0.05 at both its surfaces is installed between the oxygen tank and the outer tank, draw the thermal circuit. (5 Marks) (d) Calculate the heat transfer to the oxygen and the reduction in heat transfer due to the presence of the radiation shield. (7 Marks)