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transfer takes place in 3 main ways: conduction, convection and radiation. The process of conduction in thermal dynamics is dependent on the factors such as heat transfer coefficient of the material, area, thickness through which the heat is transferred and the change in temperature.

width 0.8m and thickness of 45mm with a coefficient of heat transfer of 0.18W/m°C. The

temperature inside the house is 24°C and temperature outside the house is -2°C.

The rate of heat transfer, R= (k* A* ?T)/ d

Here, k= coefficient of heat transfer= 0.18W/m°C

A= Area through which the heat is transferred= rectangular window= (1.5m* 0.8m) = 1.2m

?T=final temperature– initial temperature= 24°C- (-2)°C = 26°C

d= thickness= 45mm= 0.045m

So, Rate, R= (0.18* 1.2* 26)/ 0.045=

Let the rate of heat transfer, R

Now, given d

So the new rate of heat transfer, R

So, R

This implies: R

Therefore, R