A very long rod 5 mm in diameter has one end at 250°C. The surface of the rod is exposed to ambient air at 25°C with a convection heat transfer coefficient of 50 W/m2.K. The thermal conductivity of the rod, k = 100 W/m.K. Assume steady-state conditions. (a) Determine the temperature in the rod at x = 50 mm and at x = 100 mm. (b) Also find the heat loss from the rod. (c) Calculate the fin effectiveness. Draw sketch and show all calculations.

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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.