Insulating Glass Principle

Because insulated glass contains a desiccant that adsorbs water molecules, the air inside is dry. Therefore, condensation will not form inside the insulated glass when the temperature decreases, and the dew point on the outer surface of the insulated glass will also increase.

 

Energy transfer in insulated glass occurs in three ways: radiation, convection, and conduction.

 

Radiation Transfer

Radiation transfer is the transfer of energy through rays in the form of radiation. These rays include visible light, infrared radiation, and ultraviolet radiation, similar to the transmission of sunlight. Properly configured insulated glass units and an appropriate spacer thickness can minimize energy transfer through radiation, thereby reducing energy loss.

 

Convection Transfer

Convection transfer occurs due to a temperature difference between the two sides of the glass. Air descends on the colder side and rises on the warmer side, creating air convection and resulting in energy loss.

 

Conduction and transfer

Conduction and transfer are achieved through the movement of molecules in an object, which in turn drive the movement of energy, just like cooking rice in an iron pot or soldering things with an electric soldering iron. In double-glazed windows, energy conduction and transfer are accomplished through the glass and the air inside.