The hottest six energy-saving glasses may become t

2022-07-31
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Six energy-saving glasses or "mainstays" of building materials in the future

heat absorbing glass: it can absorb or reflect specific wavelengths in the solar spectrum. The heat absorbing glass strengthens the marine military and civil scientific research plan and gives consideration to the connection. It is the body colored glass that adds colorants to the transparent glass. Although the thermal resistance of heat absorbing glass is better than that of coated glass and ordinary transparent glass, due to the large amount of heat released into the room during the secondary radiation process, the heat absorption and light transmission are often contradictory, so the heat insulation function of heat absorbing glass is limited to a certain extent, and a considerable part of the heat absorbed by heat absorbing glass will still be transmitted to the room. Therefore, when the shrapnel is used, the comprehensive effect is not ideal

heat reflective coated glass: the optical property is to reflect heat radiation. Once the reflectivity and projectivity are determined, its unidirectional characteristic is particularly prominent. That is, it can only meet some requirements of building environment changes, such as heat resistance and heat absorption requirements that change with seasons. Moreover, the heat resistance of heat reflective coating and heat absorbing glass is at the cost of light transmittance, which is not conducive to natural lighting in most cases

low-e glass: low surface emissivity and high infrared reflectance. Less heat absorption, low temperature rise and low secondary radiation heat. In addition, the light transmittance can be 33%-72% and the shading coefficient is 1.. 68. However, the thermal radiation reflectance of Low-E glass still has the problem of directionality. Relevant experiments show that no matter whether the Low-E Mo surface is on the second or third side of the insulating glass, the test results of the heat transmission coefficient in winter and summer are only 2% different. The conclusion is that the effect of blocking thermal radiation transmission is independent of season

insulating glass: it is a kind of product that is effectively supported between two or more pieces of glass (called glass substrate) and sealed around by bonding method (called air chamber). It is always filled with dry gas, so that it has three basic functions: energy saving, heat insulation and anti condensation

coated glass: refers to glass products with organic film on iron, which will be broken under strong enough impact, and the glass sheet can adhere to the organic film without VOC dispersion. Building glass organic film is composed of polyester film after surface metallization treatment, which is compounded with another layer of polyester film. Its surface is coated with a wear-resistant layer and its back is coated with installation adhesive, and a protective film is pasted. It is installed on the surface of the glass to enhance the safety of the glass (impact resistance and support of glass fragments), or to reduce the heat of solar radiation and block ultraviolet rays. Adding glass organic film with safety and energy-saving properties is a more feasible technical means to improve the safety of building glass and the energy-saving effect of buildings at present. It can enhance the impact strength of non safety glass, prolong the time when the glass is broken by external forces, and prevent the splashing of glass from causing damage to people and property. That is, the coated glass made of transparent safety film does not increase the mechanical strength of the glass itself, but because the polyester base of the film has very good humanity and impact resistance, when the film is violently impacted by external forces, the film will absorb a lot of impact. And make it decay rapidly, so that the coated glass is difficult to be broken down, and still maintain good integrity of the coated glass. The main functions of glass pasted building energy-saving film are sunlight control, energy saving, safe explosion-proof, glare blocking, ultraviolet blocking and glass surface protection. This kind of membrane material has certain safety performance. It also has different building energy-saving power requirements. Its performance indicators include visible light projection ratio, visible light reflectance, shading coefficient, U value and other indicators

gel glass: fill a medium silicate glass between the hollow glass, that is, the material called "aerogel". The particle layer thickness is only 16mm, the light transmittance is 45%, and the heat transfer system U value is 1. 0, the transparent field of vision is almost the same as that of hollow glass, and the light entering the room is evenly distributed. Good light transmission and high heat insulation are the main characteristics of gel glass. The low-temperature radiation inside is far lower than that of ordinary insulating glass, so it can ensure a higher indoor temperature in winter. At the same time, it provides a great space for the refraction of light for future reference. The maximum transmission of light only depends on the incident angle of the sun to a small extent. Therefore, the natural light in the daytime is evenly distributed in the indoor space

as the building base material, glass will play a more important role in energy-saving buildings in the future. At the same time, ordinary glass will withdraw from the market, and energy-saving glass will become the main product in the market

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