A resistor provide energy to a metal block 20 cm wide with a conductivity of 120 W/m.k. The temperature on the metal block near the resistor side is 70 oC. The heat travel to the other side of the block. On the other side, air is cooling the metal block. The convective heat transfer coefficient for air is 300 W/m2.k. Calculate the energy of the resistor in KW/m2 such that the air temperature near other side of the block is 0oC.

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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.