An energy-efficient double-paned window consists of two panes of glass, each with thickness L1 and thermal conductivity k1, separated by a layer of air of thickness L2 and thermal conductivity k2. Show that the equilibrium rate of heat flow through this window per unit area, A, is

In this expression, T1 and T2 are the temperatures on either side of the window.

Transcribed Image Text:

(T, – T;) Q At 2L 1/k, + L2/k2