A spherical container of negligible thickness holding a hot fluid at 140 oC and having an outer diameter of 0.4 m insulated with three layers of each 50 mm thick insulating of k1=0.02 , k2=0.06 and k3=0.16 W/mOC. (Starting from inside). The outside surface temperature is 30oC. Determine the heat loss and interface temperature of insulating layers.

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Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.