A cold storage room is constructed of an inner layer of 12.7mm of pine, a middle inner of 101.6mm of cork board, and an outer layer of 76.2mm of concrete. The wall surface temperature is 255.4 K inside the cold room and 297.1 k at the outside surface of the concrete. Thermal conductivity of pine is 0.151; corkboard 0.0433; concrete 0.762W/m-K. Calculate the heat loss in W for 1m^2 surface area.

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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.