In the case where there is a multilayer wall of more than one material present, as shown in Fig. 4.3-1, we proceed as follows. The temperature profiles in the three materials A, B, and C are shown. Since the heat flow q must be the same in each layer, we can write Fourier's equation for each layer as

Equation 4.3-1

Solving each equation for ΔT,

Equation 4.3-2

Adding the equations for T_{1} − T_{2}, T_{2} − T_{3}, and T_{3} − T_{4}, the internal ...

Start Free Trial

No credit card required