The hottest low radiation coated glass

2022-08-16
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Low radiation coated glass

modern buildings, whether commercial buildings or residential buildings, tend to have large areas of glass lighting. However, ordinary glass cannot block the transmission of heat energy in the sun to the interior in summer, nor can it block the leakage of indoor heat energy in winter. The proxy for maintaining an appropriate indoor temperature can only be a large amount of energy consumption of air conditioning and heating. Therefore, the direct consequence of large areas of glass lighting is a great loss of energy conservation of the whole building. How to minimize the energy loss of glass on the premise of ensuring good indoor lighting? Zhejiang engineering glass, then we can judge that the sensor is normal. The low radiation coating to be launched by the limited company can effectively solve the contradiction between glass lighting and energy saving, and provide strong support for modern architectural design

low radiation coated glass is to evenly coat the surface of high-quality float glass with a special metal film system by magnetron vacuum sputtering, which greatly reduces the emissivity of the glass surface from 0.84 to 0.04 ~ 0.12, and improves the spectral selectivity of the glass. The hollow product made of Low-E glass can effectively transmit visible light through the membrane system and glass, and more than 80% of the invisible infrared rays are reflected by the membrane system. In particular, the far infrared ray is almost completely reflected back without passing through the glass, which not only keeps the indoor brightness, but also reduces the indoor heat load to a certain extent. Low-E glass can also significantly reduce the ultraviolet transmittance of glass, prevent organic aging, fabric fading and other problems

European manufacturers began to study Low-E glass in the laboratory in the late 1960s. In 1978, in terpane successfully applied "Low-E" glass to buildings. In 1985, the British Pilkington company realized the commercial production of Low-E glass. The vacuum magnetron sputtering coated glass production line to be introduced by Zhejiang engineering glass Co., Ltd. is currently the largest and most technologically advanced coated glass production line in Asia. This production line adopts the latest technology and control means in the world, and can produce various types and colors of low radiation coated glass on a large scale, especially tempered low radiation coated glass

The two production methods of Low-E glass are:

first, high temperature pyrolysis deposition method

high temperature pyrolysis deposition method. Low-E glass has products from many companies in the United States. Such as PPG company and Ford company. These products are finished in the cooling process of float glass. Liquid metal or metal powder is sprayed directly on the surface of hot glass. As the glass cools, the metal film becomes a part of the glass. Therefore, the film is hard and durable. The "Low-E" glass produced by this method has many advantages: it can be hot bent and tempered, it does not need to be used in a hollow state, and it can be stored for a long time. Its disadvantage is poor thermal performance. Its "U" value is twice that of sputtered "Low-E" coated glass. If you want to improve its thermal properties by increasing the film thickness, its transparency is very poor

second, off-line vacuum sputtering method

the "Low-E" glass produced by sputtering method is different from the high-temperature pyrolysis deposition method, and the sputtering method is off-line. The production of Low-E glass by sputtering process requires a layer of pure silver film as a functional film in many places in China. The pure silver film is between the two metal oxide films. The metal oxide film provides protection for the pure silver film, and acts as an intermediate layer between the film layers to increase the purity of color and light transmittance

low radiation coated glass is mainly divided into the following types according to its use:

high transmittance low radiation coated glass

this kind of glass has the characteristics of low heat transfer coefficient and reflecting far-infrared heat radiation. It can reflect the heat emitted by indoor heating, household appliances and human body in winter indoors, and reduce the heat conduction of the glass, so as to obtain excellent heat preservation effect. This kind of glass, which is suitable for cold areas in the north, also has high solar transmittance, which can make the near-infrared thermal radiation of the sun enter the room and increase the indoor heat, so as to effectively reduce the energy consumption of heating

sun shading low radiation coated glass

this kind of glass not only has the characteristics of low heat transfer coefficient and reflecting far-infrared thermal radiation, but also has the characteristics of reflecting the near-infrared thermal radiation of the sun. This kind of glass only allows the visible light in the sunlight to enter the chamber, and the volume must be sealed in the working process to block the thermal radiation in it, so it is particularly suitable for use in southern areas and transition areas. After using this kind of glass, even if there is sunlight, there will be no heat feeling. It can not only ensure that the indoor heat energy does not leak out in winter, but also ensure that the heat energy in summer sunlight can be prevented from entering the room

double silver Low-E glass

double silver Low-E glass is the most advanced environmental protection and energy-saving product at present. It highlights the shielding effect of glass on solar thermal radiation, and skillfully combines the high transmittance of glass with the low transmittance of solar thermal radiation. In addition to the characteristics of ordinary Low-E glass, it also has the following two characteristics

1. High transmittance --- the visible light band maintains a high transmittance to ensure good natural lighting

2. Extremely low, it can intelligently turn on and off the solar energy transmission rate - effectively limit the transmission of solar thermal radiation, especially the transmission of near-infrared thermal radiation

after synthesizing insulating glass with low radiation coated glass, compared with ordinary monolithic glass, it can save energy by more than 60% in summer and more than 70% in winter. Therefore, using this kind of glass can effectively save air conditioning or heating costs. At the same time, this kind of glass also has good sound insulation performance, and the noise can be reduced by more than 34 dB

Another characteristic of low radiation coated glass is the wide range of light transmittance. Varieties with high light transmittance are almost the same as transparent glass, which can maximize the access to natural light; Varieties with low light transmittance can restrict outdoor peeping indoors to meet the needs of privacy; The variety with medium light transmittance can make the building produce a faint perspective beauty, so as to provide a variety of choices for different use needs

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