Chapter 3: Steady-State Conduction
Problems for Chapter 3
Note: These problems are NOT your homework assignments. Homeworks will be assigned in class on a separate handout.

  1. A rectangular slab, 2 cm thick, is measured to be 100 ºC on one side and 96.2 ºC on the other side. The slab is 20 cm by 20 cm. Calculate the rate of heat transfer through the slab if the conductivity of the slab is 170 W/mK.

  2. For a composite shown on the right, construct the thermal circuit model. Find the total thermal resistance of the composite. The thermal conductivities are: k1 = k3 = 80 W/mK, k2 = 120 W/mK, k4 = 100 W/mK, and k5 = 150 W/mK.

  3. For the same composite, air temperature on the left side is 20 ºC, and on the right side is 80 ºC. Convection coefficient is h = 15 W/m2K on both sides. What is the rate of heat transfer through the composite?

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