Liquid oxygen is stored in a thin-walled, spherical container 0.8 m in diameter, which is enclosed within a second thin-walled, spherical container 1.4 m in diameter. The opaque, diffuse, gray container surfaces have an emissivity of 0.05 and are separated by an evacuated space. If the outer surface is at 280 K and the inner surface is at 95 K, what is the mass rate of oxygen lost due to evaporation, in kg/s? (The latent heat of vaporization of oxygen is 2.13 × 105 J/kg.) m = i kg/s

04. Consider a long duct constructed with diffuse, gray walls 1 m wide as shown in the figure. Determine: (a) The net radiation transfer from surface Ai per unit length of the duct and (b) the temperature of the insulated surface A3. (c) What effect would changing the value of ɛ3 have on your results? After considering your assumptions, comment on whether you expect your results to be exact. -Ą‚T;=1000K,&=0.33 A2 T-700K, E#05 -As,Ts,ɛg=0.8 Width, all sides,w-Im Insulated surface-

Calculate the absorbed irradiation by the surface in W/m2

Liquid oxygen is stored in a thin-walled, spherical container 0.8 m in diameter, which is enclosed within a second thin-walled, spherical container 1.2 m in diameter. The opaque, diffuse, gray container surfaces have an emissivity of 0.05 and are separated by an evacuated space. If the outer surface is at 275 K and the inner surface is at 95 K, what is the mass rate of oxygen lost due to evaporation, in kg/s? (The latent heat of vaporization of oxygen is 2.13 x 105 J/kg.) m = i kg/s