Q$1.$ Two

glass sheets, separated by a

dry$-$air gap are used as double$-$glazed frame instead of single glass. The convective coefficients of outside and inside air are

and

$,$ respectively. And temperature of the outside air is

$,$ and indoor temperature is

$.$ If the relative humidity

of indoor air is

in everywhere and the relevant dew point temperature of air is

$.$

and

$.($a$)$ Sketch the temperature profile in double$-$glass window. $($b$)$ Find if dew $($condensation$)$ on window panes is avoided by having a double$-$glazed frame $($double glass window$)$