Do you really understand Low-E glass? 12 full questions and answers
[China Glass Network] 1. What is Low-E glass? French Terry Fabric,French Terry Brushed,Cvc French Terry,French Terry Chenille Embroidery Shaoxing Huangdaopo Trade Co.,Ltd. , https://www.sxhdptrading.com
Low-E glass is a low-emissivity glass that is coated on the surface of the glass to reduce the emissivity E of the glass from 0.84 to less than 0.15.
2. What are the characteristics of Low-E glass?
1 Infrared reflectivity is high, which can directly reflect far-infrared heat radiation. 2 The surface emissivity E is low, and the ability to absorb external energy is small, so that less heat is radiated. 3 The sunshade coefficient Sc is wide, and the amount of solar energy can be controlled as needed to meet the needs of different regions.
3. Why does the Low-E film reflect heat?
The Low-E layer is plated with a silver layer that reflects more than 98% of the far-infrared heat radiation, reflecting the heat directly as reflected by the mirror. The low-E shading coefficient Sc can be from 0.2 to 0.7, so that the direct solar radiant energy entering the room can be regulated as needed.
4. What kinds of mature coated glass processes are there?
There are two main types: on-line coating, vacuum magnetron sputtering coating (also known as off-line coating). The in-line coated glass is manufactured on a float glass production line, which has a single variety, poor heat reflectivity, and low manufacturing cost. Its advantage is that it can be hot bent. The off-line coated glass has a variety of varieties, excellent heat reflection performance and obvious energy-saving characteristics. The disadvantage is that it cannot be bent.
5. Can Low-E glass be used in a single piece?
The Low-E glass manufactured by the vacuum magnetron sputtering process cannot be used in a single piece, and can only be used for synthesizing insulating glass or laminated glass. However, its emissivity E is much lower than 0.15 and can be as low as 0.01 or less. Low-E glass manufactured by in-line coating process can be used in a single piece, but its emissivity is E=0.28. Strictly speaking, it cannot be called Low-E glass (scientifically, the object with emissivity E≤0.15 is called low radiation). object).
6. How does Low-E glass work in summer and winter?
In winter, the indoor temperature is higher than the outdoor, and the far-infrared heat radiation mainly comes from the indoor. The Low-E glass can reflect it back into the room to keep the heat in the room from diarrhea. For some solar radiation from the outside, Low-E glass can still allow it to enter the room. This part of the energy is absorbed by the indoor object and then converted into far infrared heat radiation and left indoors. In summer, the outdoor temperature is higher than indoors, and the far-infrared heat radiation mainly comes from the outside. Low-E glass can reflect it out to prevent heat from entering the room. For outdoor solar radiation, Low-E glass with a low shading coefficient can be selected to restrict it from entering the room, thereby reducing the cost (air conditioning cost).
7. What is the role of argon gas filling in Low-E glass hollow glass?
Argon gas is an inert gas, and its heat transfer property is inferior to that of air. Therefore, charging into the insulating glass can lower the U value of the insulating glass and increase the heat insulating property of the insulating glass. For Low-E insulating glass, argon also has the effect of protecting the Low-E film layer.
8. How much ultraviolet light can the Low-E glass attenuate?
Low-E glass reduces UV light by 25% compared to conventional single-piece clear glass. Low-E glass reduces UV light by 14% compared to heat-reflective coated glass.
9. Which surface of the hollow glass is suitable for the Low-E film?
The insulating glass has four faces, and the number from the outdoor to the indoor is 1#, 2#, 3#, and 4#, respectively. In areas where heating demand exceeds cold demand (northern area), the Low-E film layer should be on the 3# surface. Conversely, the area where the cooling demand exceeds the heating demand (Southern region), the Low-E film should be located on the 2# surface.
10. How long does the Low-E film last?
The duration of the coating layer is the same as the duration of the sealing of the hollow glass space layer.
11, how to distinguish whether the hollow glass is coated with Low-E film?
You can monitor and judge according to the following steps: A. Observe the four images presented in the glass (in other words, there are 4 flames to get 4 images). B. Place the match or bright parts in front of the window (whether you are indoors or outdoors). If it is Low-E glass, there is one image different from the other three images. If the four images are the same color, you can determine Install Low-E glass.
12. Do users need to do something to maintain Low-E glass products?
No need! Because the Low-E film is sealed between the hollow glass or the laminated glass, no maintenance is required, and it is only necessary to keep the glass surface clean.