How to Really Save Energy in Aluminum Alloy Doors and Windows

[China Aluminum Network] The structure of aluminum alloy doors and windows is undoubtedly crucial to its energy-saving effect. To achieve a good energy-saving effect, it must have the most reasonable structure possible.

To achieve the effect of energy conservation, it must be considered from the perspective of thermodynamics. The exchange of heat in thermodynamics is divided into convection, conduction and radiation. Of course, these three methods also apply to the construction of aluminum alloy doors and windows and curtain walls. Convection is the circulation of hot and cold air flows between aluminum alloy doors and windows, resulting in heat exchange and loss of heat.

Conduction conducts heat through one surface of the object itself to the other opposite surface, and heat is transferred by molecular motion. Radiation is the direct transmission of energy by rays, ie, infrared rays. Regardless of the window made of any material, if it can effectively block the above three kinds of heat exchange, it can be called a better energy-saving window. Some people say that "plastic windows are energy-saving windows" is obviously not clear.

Reducing the loss of heat and wasting energy is not simply a matter of using plastics or aluminum. It is necessary to consider how to reduce the loss of heat (or air-conditioning) from the three main aspects. On the front, consider the structural design of the window. Second, the large area of ​​heat dissipation of the window is glass, not the window frame, which accounts for 70% to 90% of the area of ​​different types of windows. Flat glass, coated glass, hollow glass, LOW-E glass, and LOW-E hollow glass all have energy-saving effects, but only to varying degrees. In different regions, the functions of different building requirements windows are different, and which kind of glass cannot replace another glass. Third, the window frame material is energy-saving.

The aluminum alloy window type commonly used in the building is generally a sliding window, a flat window, and a fixed window. The sliding window is developed from an early sliding door in Japan. The two window sashes are opened and closed in a sliding rail on the window frame. The window area is half of the window frame. The size of the convection of hot and cold air is proportional to the size of the upper and lower sashes of the window sash. Due to the prolonged use of time, the surface of the seal top wears, the air gap between the upper and lower sides of the window increases, and the energy consumption increases. The energy saving effect of the sliding window made of aluminum alloy or plastic steel material is not ideal. It can be said that the structure of the sliding window determines that it is not an ideal energy-saving window.

Second, Pingkai window inside and outside the casement window. Regular aluminum alloy casement windows are generally sealed with good rubber between window sashes and sashes, sashes and window frames. After the sash is closed, the sealing rubber strips are pressed tightly and the sealing performance is very good, and it is difficult to form convection. The heat loss of this type of window is mainly the heat conduction and radiation of the glazing profiles of glass and window frames. If this problem can be solved, the energy saving effect of casement windows will be guaranteed. Structurally, casement windows have a distinct advantage over sliding windows. Casement windows can be called true energy-saving windows.

Third, the window frame of the fixed window is embedded in the wall body, the glass is directly placed on the window frame, and the four sides of the glass and the window frame are sealed by the sealant. Under normal circumstances, there is good water tightness and airtightness, air is difficult to convection through the sealant, so convective heat loss is minimal. Thermal conduction of glass and window frames is a source of heat loss. The fixed window is an ideal window for energy saving.

Flap Disc

Flap disc, commonly known as flat emery cloth wheels, emery discs, flower impellers or elastic grinding discs, are a large variety of coated abrasive conversion products, which press the cut coated abrasive sheets one by one. It is formed by sticking adhesive to the back cover plate along the circumference. The flap disc are called strong elastic grinding discs. They are made of calcined emery cloth, which uses mesh, nylon, plastic, steel paper and other materials as the base. Attached abrasive tools, evenly distributed in a fan shape to ensure the best grinding effect. The particle size is 36#-320#, 60# and 80# are the most common, and the outer diameter is 4"-7" installed on the angle grinder. Angle grinders are mainly installed on hand-held Power Tools to polish and polish welds, burrs, chamfers, surface rust removal, and surface polishing of various metal and non-metal parts.