A double-glazed window has two panes of glass separated by
Chapter 21, Problem 43P(choose chapter or problem)
(III) A double-glazed window has two panes of glass separated by an air space, Fig. Show that the rate of heat flow through such a window by conduction is given by
\(\frac{Q}{t}=\frac{A\left(T_{2}-T_{1}\right)}{l_{1} / k_{1}+l_{2} / k_{2}+l_{3} / k_{3}}\)
where \(k_{1}, k_{2}, \text { and } k_{3}\) are the thermal conductivities for glass, air, and glass, respectively. (b) Generalize this expression for any number of materials placed next to one another.
Equation Transcription:
Text Transcription:
Q over t=A(T_2 - T_1) over l_1/k_1 + l_2/k_2 + l_3/k_3
k_1,k_2, and k_3
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