A 0.8m high and 1.5m wide double pane window consisting of two 3mm thick layers of glass(k=0.78W/mK) is separated by a 10mm wide stagnant air space(k=0.026 W/mK). The convection heat transfer coefficients on the inner and outer surfaces of the window are 10W/m^2K and 35W/m^2K respectively. For a day when the room is maintained at 25oC while the temperature outdoors is 10oC, determine:
i) the steady rate of heat transfer through this double pane window, and
ii) the temperature of its inner surface.
The Attempt at a Solution
What should I do after this?
And is it correct to calculate Rth,air like this?
Thank you very much.