The glass curtain wall is a more active and sensitive part of the heat exchange in the building envelope structure, and the heat exchange heat loss is 5-6 times larger than that of the concrete or brick masonry. {TodayHot} this makes it energy-saving. The technology has received more and more attention. 1 Status of Energy Saving Technology for Glass Curtain Walls At this stage, the main measures to improve the energy-saving and heat-insulating performance of glass curtain walls are to use coated glass, LOW-E glass, heat-reflecting glass, hollow glass, and heat-insulating bridge aluminum to reduce the structural heat transfer coefficient, eliminate the “thermal bridge†of the structural system, and reduce Air permeability heat loss, reduce the opening window area, improve the sealing and so on. In most areas, single-layer coated glass, LOW-E glass, and heat-reflecting glass are used for heat preservation and energy conservation; in buildings where insulation requirements are extremely high in cold regions, hollow glass and heat-insulating aluminum bridges are used to achieve energy conservation. The thermal insulation principle of the insulated bridge aluminum profile is based on the creation of a continuous insulation zone, using heat insulation strips to separate the aluminum alloy profile into two parts. The material selected for the insulation bridge “Cold Bridge†is polyamide nylon 66, which has a thermal conductivity of 0.3 W/(m·K), which is much smaller than that of aluminum alloys, and its mechanical properties are comparable to those of aluminum alloys. At the end of the 1970s, thermal insulation bridge aluminum profiles were introduced abroad, mainly used for aluminum alloy doors and windows in the alpine region, and began to be used as a framed glass curtain wall in the cold regions in the late 1980s. {HotTag} China is currently using buildings with high requirements for heat insulation and heat insulation, and it has also begun to use it for bright-frame heat-insulating glass curtain walls, hidden-frame heat-insulating glass curtain walls and point-supporting heat-insulating glass curtain walls. In addition, in the thermal insulation curtain wall, if 10+12A+10 hollow glass is used at the same time, the heat transfer coefficient K is about 3.0 W/(m2·K), and the heat transfer coefficient is lower by nearly 1/2 than the single layer glass and can be greatly reduced. Energy consumption, therefore, in the case of relatively high insulation performance requirements, hollow glass should be used, if the hollow glass is filled with inert gas, its K value can also be reduced to 1.3 W / (m2 · K), energy-saving effect is excellent. In response to the requirements of curtain wall energy conservation, we have developed and designed a glass curtain walled, energy-saving, and heat-insulating aluminum frame in a timely manner. 2 General ideas for development and design The general idea of ​​the development and design of the heat-insulating glass curtain wall of the bright frame is to assemble different thicknesses of insulating glass by changing the dimensions of the heat-insulating strip and the strip of rubber under the condition that the section of the aluminum alloy profile is constant, thereby achieving different thermal insulation designs. Requirements, for different regions, different types of buildings, different requirements of the choice of owners. 1- Outdoor plastic strips; 2-Insulating glass; 3-room plastic strips; 4-beam; 5-column 3 series design of energy-saving heat insulation aluminum alloy profiles The design of energy-saving and heat-insulating aluminum alloy profiles is the core part of the development project of the entire open-frame heat-insulating glass curtain wall. It divides the aluminum alloy profile into two, and adds a non-metal material with low thermal conductivity and high mechanical properties as a heat-insulating bar. These composite materials can not only meet the mechanical performance requirements of the structure, but also meet the requirements for thermal insulation performance. . Considering the requirements of mechanical performance, decorative performance, assembly reliability and economical efficiency of architectural glass curtain walls, we optimize the design. 3.2 Design of thermal insulation strip The heat-insulating strip "Cold Bridge" is made of PA66GF25 (abbreviated as PA66), which is a polyamide nylon 66 with a glass fiber content of about 25%, and its thermal conductivity is less than 0.3 W/(m·K), while its mechanical properties and aluminum alloy Quite, the coefficient of thermal expansion is similar to that of aluminum alloys, and it is resistant to aging and has a wide range of applicable temperatures. It is an ideal thermal insulation material for structures. Considering the assembly with the aluminum alloy and the thickness of the commonly-installed glass, the heat-insulation strip is designed to have two widths and widths. For special requirements of the project, its sectional size can be designed separately. 3.3 The design of the strip The rubber material is selected from EPDM rubber, its advantages are: weather resistance, heat resistance and good sealing. 3.4 Serialized Design Combining parts to form four different series (JN18, JN30, JN36, JN48), matching the thickness of the insulating glass (or single glass) can form different performance of the frame heat-insulating glass curtain wall system. In different regions and different types of buildings, the owners can freely choose energy-saving and heat-insulating curtain walls with various properties according to local requirements for the energy-saving performance of glass curtain walls. See Table 1 for the heat transfer coefficients of the 4 series of bright-frame glass curtain walls. Table 1 Heat Transfer Coefficients of 4 Series Insulating Glass Curtain Walls Series JN18 JN30 JN 36 JN48 Heat transfer coefficient?/[W/(m?2K)] 3.0 to 4.7 1.9 to 3.0 1.6 to 2.5 1.4 to 2.0 With the further deepening of energy-saving work, in the construction of exterior decoration projects, the open-frame heat-insulating glass curtain wall must be widely used. The serialized products we design not only save energy and reduce consumption, but also facilitate the finalization of product production, reduce the number of aluminum alloy profiles to open the mold, reduce costs, therefore, have good social and economic benefits. 4 Development trend of energy conservation technology for glass curtain walls The development trend of the thermal design of glass curtain walls is: For the pursuit of the curtain wall with heating and heating as the greenhouse effect, for the curtain wall with air conditioning and refrigeration as the pursuit of the cold room effect, no matter what kind of curtain wall will pursue the rational use of solar energy. The application of a photovoltaic curtain wall composed of a photovoltaic panel system and a curtain wall system will be a development direction for the active use of solar energy. In European and American countries, more consideration is given to the rational use of solar energy in building energy-saving technologies. Hot-air ventilation curtain walls are a typical example. It uses the chimney effect of hot air to naturally discharge the hot air of the thermal buffer layer to the outside, and cooperates with the electric lifting curtain in the insulating glass, so as to achieve a good heat insulation and energy saving effect. On this basis, the light-sensitive and heat-sensitive properties of the glass curtain wall cladding material and the indoor heating and cooling systems form a computer-controlled network to achieve the intelligent thermal effects of the curtain wall. The integration of the curtain wall structure system and the solar energy utilization system can be achieved. The ideal form of energy saving for glass curtain wall buildings - smart walls. 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3.1 Design of basic components of aluminum alloy profiles