Question

The inner and outer surface temperature of a glass window 10 mm thick are 25 and 5 degree-C, respectively. What is the heat loss through a 1 m x 3 m window

Answer 1

Answer:

The  heat loss is  $H = 8400\ W$

Explanation:

From the question we are told that

   The thickness is  $t = 10 \ mm = 0.01 \ m$

    The inner temperature is  $T_i = 25 ^oC$

    The outer temperature is $T_o = 5 ^oC$

    The length of the window is  L  = 1 m  

    The  width of the window is  w  =  3 m  

Generally the heat loss is mathematically represented as

      $H = \frac{k * A * \Delta T}{t}$

Where  k is the thermal conductivity of glass with value $k = 1.4\ W/m \cdot K$

   and A  is the area of the window with value

           $A = 1 * 3$

            $A = 3 \ m^2$

substituting values

       $H = \frac{1.4 * 3 * (23-5)}{0.01}$

       $H = 8400\ W$