The surface of a furnace wall is at temperature of 1350°C. The outsidewall temperature is 42°C. The furnace wall is made of 25 cm of refractory material having a thermal conductivity of 1.4 W/m-K. The outside wall is steel, 1 cm thick with thermal cnoductivity of 47 W/m-K. Calculate the thickness in meter of brick to be installed in between the refractory material and steel if its thermal conductivity 0.28 W/m-K and the heat loss is not to exceed 750Wm²-K. O 0.513 O 0.438 O 0.402 O 0.481

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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.