The interior of an oven is maintained at a temperature of 1500°F by means of suitable control apparatus. The walls of the oven are 9 in. thick and constructed from a material having a thermal conductivity of 0.18 Btu/hr-ft-°F. Calculate the heat loss for each square foot of wall surface per hour. Assume that the inside and outside wall temperatures are 1500°F and 400°F respectively.

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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.