▲ Henan Wufang Science and Technology Museum (Zhengzhou)
Passive houses have high requirements for the performance of building materials. Traditional doors and windows, due to their high heat transfer coefficient and poor thermal insulation effect, can no longer meet the requirements of passive houses. Therefore, doors and windows have become one of the key nodes in passive house design.
For this view, Zhang Xiaoling, Director of the International Cooperation and Exchange Division of the Science and Technology and Industrialization Development Center of the Ministry of Housing and Urban-Rural Development, expressed recognition, “Passive doors and windows are one of the keys to promoting passive houses. With the subsequent vigorous promotion of passive houses, the market for passive doors and windows Increased demand will bring new development opportunities for passive door and window companies."
Standard pilot ultra-low energy building
In order to standardize and improve the technical indicators such as ultra-high thermal insulation and ultra-high air tightness of passive ultra-low energy buildings to reach unified standards, to meet the needs of passive ultra-low energy buildings, so as to enhance and enhance the comfort of living, so that passive houses can be better Promotion. Recently, the Ministry of Housing and Urban-Rural Development issued an announcement on the national standard "Technical Standards for Near-Zero Energy Buildings", which will be implemented on September 1, 2019.
The standards of Passive Houses vary from place to place, and specific issues require specific analysis. Unlike Germany’s single climatic zone, my country’s climatic zone is more complex. Zhang Xiaoling said that for the promotion of every passive house project in my country, the environmental indicators and energy consumption indicators are our own calculations. To meet the passive house standards, it is necessary to adapt measures to local conditions.
Passive doors and windows attract attention
According to the experience of the European Union in the design and construction of passive houses, as the main component of the building envelope system, the heat transfer coefficient of the whole window needs to be less than 0.8w/㎡·k, and it has the characteristics of ultra-high thermal insulation and ultra-high air tightness. .
The doors and windows of the Kraoen system adopt the "Compounds" new polymer composite material, and the multi-chamber structure gives the doors and windows more excellent performance. Kraoen ZNE92MD+ near-zero energy consumption passive window, heat transfer coefficient K≤0.78w/㎡·k, wind pressure resistance level 9, airtight performance level 8, watertight performance level 6, sound insulation performance Rw≥42dB, and Passed the German PHI certification.
Market demand brings development opportunities
Relevant data shows that passive houses in Europe are increasing at an annual rate of 8%. They are known as energy-saving replacement houses with low energy consumption and extremely high comfort that have more development potential in this century. According to the practice of passive house construction in developed countries, it is Compared with buildings, the energy saving of passive houses can reach more than 90%.
Following the cooperation between the Ministry of Construction and the German Energy Agency to build a passive house high-rise residential demonstration project in Qinhuangdao, passive house projects in Beijing, Shanghai, Heilongjiang, Anhui, Shandong, Qinghai and other provinces and cities are being promoted. According to Zhang Xiaoling, in 2014, 18 passive house demonstration projects in my country will be fully launched. At present, research on incentive policies to promote the development of passive houses has begun to encourage more developers to build passive houses. In 2018, dozens or even hundreds of passive low-energy-consumption buildings have been built in many provinces. In 2019, they will vigorously promote and respond to the call of the country.
Rongsheng He Mansion, Xinhua District, Shijiazhuang
The huge market demand for passive houses has brought benefits to energy-saving door and window manufacturers. As we all know, for a passive house, air tightness is the key to its low energy consumption, and the air tightness is closely related to doors and windows. Passive houses have high requirements on the quality of profiles. Through the baptism of the survival of the fittest products by the market, it will help eliminate inferior products with low-price competition, standardize the development of the industry, and provide a good development opportunity for enterprises that produce high-quality profiles.
"Even if there are few materials and parts that can meet the standards of Passive Houses, we will never lower the quality. Passive houses will choose, and will only choose high-quality, high-performance energy-saving doors and windows." Most of the hardware, profiles and other materials used are imported. With the large-scale promotion of passive houses, there will be huge market demand, which will bring unprecedented development opportunities for energy-saving doors and windows."