The performance and principle of Insulating glass

- Feb 11, 2018 -

Radiation transmission

Radiation transfer is the transfer of energy through radiation in the form of radiation, which includes radiation such as visible light, infrared light and ultraviolet light, just as the sun's rays do. Reasonable distribution of hollow glass and insulating glass thickness, can minimize the transfer of energy through the radiation form, thereby reducing the energy loss.

Convection conveys

Convection is due to the temperature difference between the two sides of the glass, causing the air to descend on the cold side and rise on the hot side, creating air convection, resulting in the loss of energy. There are several reasons for this phenomenon: First, poor sealing of the glass and the surrounding frame system, resulting in direct exchange of gas inside and outside the window frame to produce convection, resulting in loss of energy; Second, the internal structure of the insulating glass structure design Irrational, resulting in hollow glass of gas due to temperature difference between the role of convection, led to energy exchange, resulting in energy loss; Third, the entire system constitutes a large window inside and outside the temperature difference, resulting in the temperature difference between inside and outside the insulating glass also Larger, air with cold radiation and heat conduction role, first of all in the hollow glass on both sides of the convection, and then the overall transmission through the insulating glass in the past, the formation of energy loss. Reasonable insulating glass design, can reduce the convection of the gas, thereby reducing the convection loss of energy.

Conducted transmission

Conductive transmission is through the movement of the object molecules, driving energy to exercise, and to achieve the purpose of transmission, as with the iron for cooking and iron soldering things, and insulating glass transmission of energy through the glass and its internal Air to complete. We know that the thermal conductivity of glass is 0.77W / mk. The air thermal conductivity is 0.028 W / mk, we can see that the thermal conductivity of glass is 27 times the air, and air molecules such as water molecules exist, is the impact of the energy transfer of hollow glass and convection convection Main factors, thus improving the sealing performance of insulating glass, is to improve the insulation properties of insulating glass important factor.

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