Question

Width, height, thickness and thermal conductivity of a single pane window and the air space of a double pane window. Representative winter surface temperatures of single pane and air space. FIND: Heat loss through single and double pane windows.

Answer 1

Complete Question

The schematics is shown on the first uploaded image

Answer:

For single pane is
`Q =1.96 *10^(4)} \ W`

For double pane is
`Q_2 = 120 \ W`

Step-by-step explanation:

Generally the heat loss through a single pane is mathematically represented by Fourier’s law as

`Q  =  k_g *  H^2  *  ( T_1 - T_2 )/(L)`

=>
`Q = 1.4 * 2^2 * ( 15 -(-20) )/( 5 * (1 \ m)/(1000 \ mm))`

=>
`Q =1.96 *10^(4)} \ W`

Generally the heat loss through a double pane is mathematically represented by Fourier’s law as

`Q_2  =  k_a *  H^2  *  ( T_1 - T_2 )/(L)`

=>
`Q_2 = 0.024 * 2^2 * ( 10 -(-15) )/( 10 * (1 \ m)/(1000 \ mm))`

=>
`Q_2 = 120 \ W`