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[China Glass Network] The heating is full, but the home is still cold and the body is not comfortable. At the same time, energy is also quietly lost. There are two reasons why the home is not warm, either the wall insulation is not good, or the insulation performance of the window is poor. The wall itself is difficult to remedy, but replacing the windows with good performance is much simpler.
Energy-saving windows help you save money
With the increasing attention of insulation wall materials and the maturity of technology, windows have become a weak link in the insulation of houses. According to the data, a room with strict insulation materials around it is only due to the use of ordinary single-glazed windows, and its energy loss can account for more than 50% of the building's winter insulation or summer cooling energy consumption, while the outer window area It usually only accounts for 25%-30% of the building's exterior wall area. This is precisely why even if the wall is insulated with heating materials, the heating and air conditioning are very large, but the house is still hot in the winter and cold in summer. The annual air conditioning and heating costs cost a lot more.
Winter is cold and hot in summer, and weak windows are the “black hole in energy†of the house.
According to experts in building materials, modern buildings tend to be exposed to large areas. If ordinary transparent glass is used, its heat transfer coefficient is high, and there is no effective limit on solar radiation and far-infrared heat radiation. Therefore, the area is larger in summer. The more heat that enters the room, the more heat is lost in the winter. However, the push-pull plastic-steel window or aluminum alloy window commonly used at present is poor in airtightness, and a large amount of energy loss from the window slit is also the main reason for the large energy consumption of the window. Compared with developed countries, the energy consumption of windows in China's buildings is 2-3 times. Therefore, the selection of energy-saving windows has become an inevitable trend of building energy conservation. Glass insulation air conditioners use three hours a day to improve the window energy-saving indicators. There are three main technical measures: partitioning the window frame thermal bridge; improving the window tightness; increasing the number of glass layers and selecting the glass type. The glass accounts for about 80% of the entire window, so the choice of glass plays a vital role in the energy-saving effect of the window.
At present, the newly built commercial houses rarely use ordinary single-layer glass, and most of them use insulating glass. The energy saving of the insulating glass is achieved by constructing the spatial structure of the glass, wherein the dry non-convective air can block the heat conduction channel, thereby effectively reducing the heat transfer coefficient to achieve energy saving. Double or triple-layer glass, hollow aerated glass, hollow coated glass, low-emissivity glass, etc., not only ensure normal indoor lighting, but also play a good role in sound insulation, heat insulation, heat preservation and reduction of ultraviolet radiation. Scientific experiments have shown that in the summer of 38 degrees Celsius, if the room temperature is maintained at 10 hours and 25 degrees Celsius in the same house, the air conditioning needs to be turned on for 9 hours under window conditions, and the energy-saving window only needs to be turned on for 6 to 7 hours. Significant.
The warm-screen energy-saving glass that has just been introduced to the market in the past two years has also had excellent effects in heat insulation, sound insulation, frost-free dew and room comfort. Experiments have shown that in the same external environment, the energy consumption of ordinary monolithic glass is more than four times that of warm-screen energy-saving glass.
Choose energy-saving windows based on climate and orientation
For the case of large glass energy consumption, the type of glass should be correctly selected. Different glasses have different properties, and a glass is often not suitable for all climate zones and building orientations, so it should be chosen according to the specific situation.
As far as Beijing is concerned, winter time in the cold regions of the north is longer, and the energy consumption is mainly caused by indoor and outdoor temperature difference energy consumption, and energy conservation is mainly based on winter insulation. Solar radiation in winter is advantageous for maintaining indoor temperature. Therefore, when glass is selected, it is not suitable to use solar glass with low refractive index and low shading coefficient, such as single-piece heat-reflecting glass. Transparent insulating glass has good insulation performance and is suitable. Other forms of insulating glass, the outer sheet should be transparent glass or low-emission (Low-E) glass, the inner sheet should be made of heat-absorbing glass, heat-reflecting glass, so that the outer glass can penetrate and absorb solar energy, while the inner glass and The air layer can block the indoor heat from radiating and spreading, which is beneficial to indoor insulation in winter.
Five types of window performance competition
Wooden window naturally wins
In the market, the new type of wooden windows mainly consists of pure wooden windows and "aluminum-clad wood" wooden windows. The advantage of the large wooden window is that the wood grain has a strong texture. The unique warmth of the natural wood and the excellent durability have become the reason people love it. It can usually be used as an inner window, and can also be used as an outer window after painting. In addition, aluminum-clad wood doors and windows add aluminum alloy protective layer on the outer layer of pure wood doors and windows, which can meet the different requirements of the inner and outer sealing door and window materials of the building, retain the characteristics and functions of pure wood doors and windows, and protect the outer aluminum alloy. It is easy to maintain and can be sprayed in a variety of colors on the outer layer to maintain the overall beauty of the building.
Steel window is lighter
The steel window is divided into two types: empty stomach and solid belly. The steel window has the same characteristics as the steel door. Compared with the wooden window, the steel window is durable, fireproof and moisture resistant, and has a small section. The light transmittance of the steel window is relatively large, about 160% of the wooden window, but the cost is also higher than the wooden window.
Aluminum alloy window insulation color
Aluminum alloy is a mid-range profile that is not easily deformed and is affordable and easy to accept. With the continuous improvement of the aluminum alloy window manufacturing process, the technical content of the aluminum alloy window sold on the market has also been greatly improved, and the heat insulation capability of the aluminum alloy door and window added with the "broken bridge" technology has been greatly improved. From the appearance of the style, aluminum alloy doors and windows have also broken the form of the true color of the world, launched a colorful aluminum window.
Glass steel window has a long life
FRP, known as glass fiber reinforced plastic, foreign name: FRP. The main features of FRP are: light weight, high strength, anti-corrosion, heat preservation, insulation, sound insulation and long life.
Plastic steel window keeps warm and dustproof
The outer layer of the plastic steel window is mainly made of high-strength anti-oxidation plastic material, and the interior is supplemented by steel. Since the aluminum-plastic material does not conduct heat, and the joints of the good sealing equipment are tight, the plastic-steel window has the characteristics of good sealing and heat insulation, no deformation overall, and the surface is not easy to aging. The winds and sands in the north are large, and many families are closing the balcony. Especially in the case of improving the utilization of the balcony and ensuring the temperature and cleanness of the balcony, the plastic steel window becomes the preferred product.
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