عنوان مقاله [English]
A method is presented to stop heat (IR electromagnetic waves) exchange between outdoor and indoor surroundings, (buildings, cars...) saving in heat or cooling energy. Due to temperature gradient between outdoor and indoor, unwanted heat flow takes place to reach equilibrium and energy waste inevitable. In common practice the mass energy flow expected by radiation rather than convection and conduction. Base on Beer-Lambert law, thicker wall results low transmitted of the radiation.
The present work devoted to find a solution to stop undesired energy flow in the buildings. A mechanism reduces near IR radiation transmission by windows. For this purpose the glass windows are coated by thin films that reflect near IR and transmit visible radiations.