PROBLEM STATEMENT A double pane window has two glass panels separated by air that is held together by a wood, metal or plastic case as illustrated (from windowcityinc.com) Each pane of

glass is 1 cm thick and the gas space is 1.8 cm thick. The glass panes are 1 m tall and 2 m wide. The thermal conductivity of the glass is 0.88 W/m-K and of air is 0.022 W/m-K. The temperature of outside surface of the glass is -9°C. The interior room air temperature is 23°C and the interior room air heat transfer coefficient is h/= 12 W/m²-K. a) Calculate the heat transfer rate through the window. Give your answer in units of Watts. b) Calculate the temperature of the interior surface of the glass. c) Calculate the heat transfer rate through the window if one of the glass panes was removed, assuming all else about the problem was the same. Wood casing Glass Double-pane window d) Recognizing that double pane windows are more expensive than single pane windows because of the more complex design requiring twice as much glass, which would be the best choice for installing in a house, if the window lifetime is 20 years? (note: you will be able to calculate this exactly using material from CPE522, but for this problem just make a reasonable argument based on the answers to part a and part c.