The hottest energy-saving and environment-friendly

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Energy saving and environment-friendly curtain wall glass will become the leading role in the future market. As people in the industry know, the application of building curtain wall in China began in 1984. After nearly 20 years of development, so far, the annual output and ownership of building curtain wall in China has ranked first in the world. But in recent years, with the intensification of competition, the saturation of the market, the decline of prices and the reduction of profits, all people engaged in the curtain wall industry are thinking: what kind of curtain wall does the market need? The author believes that energy-saving and environment-friendly curtain wall products will be the darling of the future market

the frequent occurrence of energy crisis and the deterioration of living environment have made mankind deeply realize the importance of energy conservation and environmental protection. According to the requirements of China's building energy conservation and environmental protection policy, before 2000, the energy consumption of newly designed heating residential buildings should be reduced by 50% on the basis of 1980 and 1981; Since 2005, new heating residential buildings should save 30% energy on this basis; In 2010, 30% energy will be saved on this basis. According to this national requirement, it is predicted that the energy-saving and environment-friendly curtain wall products will have a broad market prospect

at present, some energy-saving and environmental protection measures adopted in the design and application of building curtain walls are:

(I) insulating glass, especially Low-E insulating glass technology

ordinary white glass 6mm, K value is about 5w/? k; 5 + 6 + 5 ordinary insulating glass, K value is about 2. 6~3。 5w/? k; If Low-E insulating glass is used and filled with argon, the K value can reach 1. 6~1。 8w/? k。 Low-E insulating glass has obvious energy-saving and environmental protection effects, and can effectively prevent the thermal radiation of indoor heating from leaking out in winter; In summer, it can prevent the outside heat radiation from entering the room. At present, the annual average consumption of Low-E glass in the world has reached 1. 200million m3

(II) "heat insulation bridge breaking" technology

at present, China has introduced two production technologies and complete sets of special equipment, namely, "plastic injection method for heat breaking aluminum profile" and "strip method for heat breaking aluminum profile". More than 100 production lines of heat-insulating aluminum profiles have been built in Shenzhen, Nanhai, Foshan, Xi'an, Qinhuangdao, Beijing and other places, with an annual production capacity of 1million tons. In terms of market demand, the market share of insulated aluminum doors and windows has been rising in the past two years. According to statistics, for the current commercial housing projects in Beijing, the actual installation and utilization rate of insulated aluminum doors and windows has been close to 46%, while in the housing construction projects within the Fifth Ring Road in Beijing, this figure has exceeded 70%

(III) double layer energy-saving curtain wall 4. Frequent use of this equipment for tensile breaking tests may cause some fasteners to loosen.

double layer energy-saving glass curtain wall is mainly divided into internal circulation and external circulation systems, which have their common points and differences. The common feature is that it forms a greenhouse effect between the double layers of glass, removes the overheated air in the greenhouse in summer, and discharges the solar heat energy into the greenhouse in winter, So as to save a lot of energy in winter and summer. In summer, the torque of the engine to prevent ultraviolet and strong thermal radiation means that the torque output from the crankshaft end of the engine is necessary to use the sunshade method. The internal and external circulation systems have the following characteristics:

1. Main features of internal circulation double-layer glass curtain wall structure

(1) its structural design can adopt the form of frame heat insulation or unit heat insulation

(2) generally, the outer glass is hollow tempered, and the inner glass is single tempered

(3) adopt mandatory measures and electrically control the pipeline system to discharge most of the hot air in the double-layer closed hot channel outside in summer. In winter, the greenhouse effect heat storage can be achieved by opening the inner side window or door to discharge the hot air indoors

(4) the thickness of the cavity between the inner and outer layers is designed as: generally within mm

(5) it is necessary to add a window sash channel for natural air to enter the room

(6) it is convenient to clean the dust between the double glasses

(7) less materials are used, so the cost is low

(8) however, it needs electric drive for air extraction, which has a lower energy saving rate than the external circulation structure

2. The main features of the external circulation double-layer glass curtain wall structure

(1) its structural design can adopt several structural forms such as outer frame, unit or point connection, and the heat insulation form of inner frame or unit hollow glass

(2) generally, the outer glass is made of single sheet or sandwich tempered glass, and the inner glass is made of hollow or Low-E tempered glass

(3) natural "chimney" effect ventilation is adopted, and all dual channel boxes are independently sealed. In summer, the hot air in the greenhouse will be discharged outside during the day. Note that the "chimney" effect of different floors is different

(4) the thickness of the cavity between the inner and outer layers is designed to be thick, which is convenient for the cavity personnel between the inner and outer layers to enter the cleaning work (450mm)

(5) there is no need to add special equipment for natural air access and indoor. The outer curtain wall is designed with air inlets and outlets, and the inner curtain wall is designed with open doors or windows. It should be noted that the air inlets and outlets should prevent the entry of sand and dust. The lower part of the channel is equipped with an air inlet for external air to enter the cavity and the upper part of the hot air exchange high temperature resistant plastic ultrason e score modern genesis G70 new headlamp after compact design

(6) the dust between double-layer glasses shall be easy to clean

(7) there are many materials used, so the cost is high. It is estimated that the design material cost of the project is 2500 yuan/m2

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