A wall is constructed of an outer layer of 0.5 inch thick plywood (k = 0.80 Btu/h-ft-oF), an inner core of 5 inch thick fiberglass insulation (k = 0.020 Btu/h-ft-oF), and an inner layer of 0.5 inch thick sheetrock (k = 0.10 Btu/h-ft-8F) (Figure P13-13). The inside temperature is 70 oF with h 51.5 Btu/h-ft2 -oF, while the outside temperature is -10 oF with h = 4 Btu/h-ft2 -8F. Determine the temperature at the interfaces of the materials and the rate of heat flow in Btu/h through the wall.
Figure P13-13

Transcribed Image Text:

Fiberglass Sheetrock insulation Plywood Inside Outside 0.5 in. + -S in. - 0.5 in.