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Consider a 1.5 m high and 2.4 m wide double pane window consisting of two 3 mm thick layers of glass (k=0.78 W/mK) separated by a 12 mm wide stagnant air space (k=0.026 W/mK). Determine the steady rate of heat transfer through this double pane window and the temperature of its inner surface for a day during which the room is maintained at 21 C while the temperature of the outdoors is -5 C. Take the convection heat transfer coefficients on the inner and outer surfaces of the window to be h_1=10 W/m^2 K and h_2=25 W/m^2 K, and disregard any heat transfer by radiation.

Consider a 1.5 m high and 2.4 m wide double pane window consisting of two 3 mm thick layers of glass (k=0.78 W/mK) separated by a 12 mm wide stagnant air space (k=0.026 W/mK). Determine the steady rate of heat transfer through this double pane window and the temperature of its inner surface for a day during which the room is maintained at 21 C while the temperature of the outdoors is -5 C. Take the convection heat transfer coefficients on the inner and outer surfaces of the window to be h_1=10 W/m^2 K and h_2=25 W/m^2 K, and disregard any heat transfer by radiation.