Calculate Heat Loss and Temperature Drop in a Glass Window Pane

Question

The cross section of a storm window is shown in the sketch. The window is measured as 1.8 m by 3.6 m. On a cold day in North Dakota, the inside and outside air temperatures are 25°C and -30°C, respectively. Convective heat transfer coefficients on the inside and outside surfaces of the window are 25 and 18 W/m2 K, respectively. Window glass has k 0[0.8 W/m.K. The air gap between glass panes may be treated as a purely conductive layer with k=0.026 W/m.K. Thermal radiation is to be neglected.

(a) How much heat will be lost through the window?
(b) What temperature drop will exist across each of the glass panes?

Summary

The question belongs to Chemical Engineering and it is about calculating the heat loss from window glass and the temperature drop that can exist in each of the glass panes has been discussed in the solution. The calculations have been clearly given in the solution.

Total Word Count 131