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What affects the thermal insulation performance: Is the glass panel thick or thin?
Release time:
2023-02-13 15:12
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For the insulating glass commonly used in building exterior doors and windows, its thickness depends on the thickness of all the hollow layers contained therein and the thickness of the glass panel. In the previous article, I talked about the influence of the thickness of the glass hollow layer on the performance of the whole window. Today, I will talk about the glass panel that everyone is more concerned about. After all, the price difference between different thicknesses is not small. Whether the cost is added or not is worth it. Let's look at the data analysis.
When the thickness of the hollow layer, the surface emissivity and the inert gas configuration are the same, the influence of the thickness of the glass panel on the U value of the hollow glass is calculated as follows (the calculation is based on the Chinese winter standard calculation conditions specified in JGJ/T151).
For double white glassThe thickness of the glass panel was thickened from 5mm to 12mm, and the U value of the insulating glass decreased from 2.677 to 2.580mm, a decrease of 0.097. The thickness of the glass panel is thickened from 5mm to 10mm, and the U value of the insulating glass is reduced from 2.677 to 2.607mm, a decrease of 0.060.For double glass monolithic LowEThe thickness of the glass panel is thickened from 5mm to 10mm, and the U value of the insulating glass is reduced from 1.773 to 1.724, a 0.049 decrease.For double-glass monolithic LowE argonThe thickness of the glass panel is thickened from 5mm to 10mm, and the U value of the insulating glass is reduced from 1.516 to 1.473, a 0.043 decrease.
For three white glassThe thickness of the glass panel was thickened from 5mm to 12mm, and the U value of the insulating glass decreased from 1.766 to 1.703mm, a decrease of 0.063. The thickness of the glass panel is thickened from 5mm to 10mm, and the U value of the insulating glass is reduced from 1.766 to 1.721mm, a decrease of 0.045.For three glass monolithic LowEThe thickness of the glass panel is thickened from 5mm to 10mm, and the U value of the insulating glass is reduced from 1.275 to 1.241, a 0.034 decrease.For three glass monolithic LowE argonThe thickness of the glass panel is thickened from 5mm to 10mm, and the U value of the insulating glass is reduced from 1.083 to 1.054, a 0.029 decrease.
The above results show that,The effect of increasing the thickness of the glass panel in the double-glass configuration on the insulation performance of the insulating glass is slightly greater than that in the case of the three-glass..The effect of panel thickness on the U value of insulating glass is slightly more obvious in the case of white glass configuration than in the case of LowE and argon.However, in general, the thickness of the glass panel does not have a great influence on the thermal insulation performance (U value) of the insulating glass. In other words, for the same insulating glass insulation performance improvement, by increasing the thickness of the glass panel to achieve, it appears.Very low cost performance. To give a simple example, the reduction in the U value of hollow glass brought about by the thickening of the glass panel from 5mm to 10mm is close to the change brought about by increasing the argon content filled in the hollow layer by 15%.
Therefore, increasing the thickness of the glass panel is not a suitable means to improve the thermal insulation performance of the glass.Is the thickness of the hollow glass panel useless? No, no, no.
First of all, the selection of panel thickness of the larger insulating glass is outStrength and safetyconsideration. Different use conditions, different glass panel size, will become the thickness of the glass panel selection to consider the factors. The JGJ113-2015 "Technical Regulations for the Application of Architectural Glass" and JG/T455-2014 "Tempered Glass for Building Doors, Windows and Curtain Walls" have clear constraints and instructions. JG/T455-2014 "Tempered Glass for Building Doors, Windows and Curtain Walls" stipulates that the allowable area of tempered glass with different panel thicknesses is as follows.
Second, the panel thickness will affectSound insulation. The sound attenuation of any material depends on its mass, stiffness and damping characteristics. For a single piece of glass, the only effective way to improve the sound insulation performance is to increase its thickness, because the stiffness and damping cannot be changed. Measuring the sound transmission loss of a piece of glass over a frequency range varies with the thickness of the glass.
So choose how thick the glass panel, depending on what function you want to improve the product. In improving the insulation performance of insulating glass, thickening the thickness of the glass panel has little effect, and the cost performance is not high. Methods such as argon filling are more immediate than it, and there are many better alternatives. If you want to improve the strength, safety and sound insulation performance, the thickness of the thickened glass panel is worth the money.
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