Question

A 3-m-internal-diameter spherical tank made of 1-cm-thick stainless steel is used to store iced water at 0°C. The tank is located outdoors at 18°C. Assume the entire steel tank to be at 0°C and thus the thermal resistance of the tank to be negligible. The heat of fusion of water at atmospheric pressure is h_if = 333.7 kJ/kg. The emissivity of the outer surface of the tank is 0.75, and the convection heat transfer coefficient on the outer surface can be taken as 30 W/m²·K. Assume the average surrounding surface temperature for radiation exchange to be 15°C.

Given: σ = 5.67 × 10^–8 W/m²·K⁴

Determine the rate of heat transfer to the iced water in the tank. You must provide an answer before moving to the next part.

kW

Answer 1