China Aluminum Network: Doors and windows are a critical part of a building's exterior structure and serve as the most vulnerable points for heat exchange. Their energy consumption per unit area is 5 to 6 times higher than that of walls, and they account for over 40% of the total heat loss in a building. There are three main causes of heat loss through doors and windows: first, heat conduction through the aluminum alloy frames; second, radiation heat loss via the glass; and third, air convection through gaps in the door and window seals. Therefore, when manufacturing insulating and energy-saving aluminum doors and windows, it is essential to address these three key factors to improve overall thermal performance.
First, the choice of aluminum alloy material plays a crucial role. Since aluminum is a good conductor of heat, its thermal conductivity is typically high. To reduce heat transfer, it is necessary to use thermally broken aluminum profiles, which interrupt the heat conduction path and significantly enhance insulation properties.
Second, the type of glass used in energy-efficient doors and windows is equally important. Insulated glass units (IGUs) are commonly used, consisting of two or more panes with a sealed air space between them. This space is usually filled with dry, stagnant air, which has low thermal conductivity, thereby improving insulation, soundproofing, and resistance to condensation. Typical glass thicknesses range from 5-6 mm, while the cavity between the panes is generally 9 mm or 12 mm, depending on the application.
Third, the quality of the sealant is vital for maintaining energy efficiency. The sealants used should be weather-resistant and capable of withstanding long-term exposure to environmental elements. Neoprene rubber is often preferred due to its excellent resistance to ozone, ultraviolet light, and aging, ensuring long-lasting performance and effective sealing.
In conclusion, creating efficient and energy-saving aluminum doors and windows requires a comprehensive approach that includes selecting appropriate materials, using insulated glass, and ensuring high-quality sealing. These measures not only improve thermal performance but also contribute to greater energy savings and comfort within the building.
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