Determine the rate of heat loss through a double glazed window, as shown in the sketch, if the inside room temperature is 65°C and the average outside air is 0°C during December. Neglect the effect of the window frame.
If the house is electrically heated at a cost of $0.06/(kW hr), estimate the savings achieved with a double glazed compared to a single glazed window during December.
GIVEN
A double glazed window as shown
Inside room temperature (T?^?o) = 65°C
Outside air temperature (T?^?o) = 0°C
Cost of heating = $0.06/(kW hr)
ASSUMPTIONS
Saving can be based on steady state analysis
Inside and outside air is still
Radiative heat transfer is negligible