The left side of a composite wall is kept at 300oC constantly.  The right side of the same wall is exposed to air at 20oC with a convection coefficient of 32 W/mk.  kA = 10 W/mK, kB = 40 W/mK, kC = 1 W/mK, kD = 300 W/mK,    kE = 0.1 W/mK Given figure 1, calculate: a) The total thermal resistance of the wall. b) The total heat rate through the wall. c) The junction temperature where B meets D (between second and third column)

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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.