An idealised representation of the air temperature as a function of distance from a single-pane window on a calm, winter day is as shown in the figure. The window dimensions are . (a) We have to calculate the rate at which heat is flowing out through the window. (b) We have to estimate the difference in temperature between the inner and outer glass surfaces. We can use that the temperature drop across the glass is very small.
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Solution: Click For PDF Version We note data from the diagram. The heat flow across the glass will be the same as the heat flow across air corridor of thickness 8 cm, when the temperature across the corridor is The thermal conductivity of air, Area of the glass window,
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