Passive buildings have been widely recognized by the industry in our country for their outstanding advantages in energy saving and low consumption, and are showing a good momentum of development. At the 3rd China Passive Building Development Summit Forum held not long ago, the participating experts and industry insiders fully affirmed the development status of passive buildings, and conducted extensive discussions on related policy issues, technical routes, and products. The reporter noticed that the content of these discussions is detailed and specific, reflecting that the development of passive architecture has reached a certain level and is advancing in depth. So, what issues should we pay attention to in the future of passive buildings that are developing rapidly in our country, and how to avoid the emergence of false passive buildings? In this regard, the reporter interviewed Xie Yuanjian, the rotating chairman of the China Passive Construction Alliance, the vice president and chief technology officer of Landsea Group.
Passive buildings are low-energy buildings originating in Germany. After being introduced to my country, they have carried out demonstration projects in different climate zones and accumulated a lot of experience. These demonstration projects have played a good role in the promotion of passive buildings.
Xie Yuanjian said that the number of passive building projects in China is growing rapidly. When the first China Passive Building Development Summit Forum was held, passive buildings in China were in single digits. There are now more than 60 projects with a construction area of more than 1.5 million square meters. Meters, there are 6 PH-certified projects with a construction area of 30,000 square meters. Nanjing, Chengdu, Hangzhou, and Tianjin are all actively constructing passive buildings. The number of organizations related to passive buildings in the industry is also increasing significantly, and relevant standards are constantly being promulgated. More and more local provinces and cities have made great efforts in this regard. promote.
Although the results are great, it is difficult for passive buildings in various regions to adopt the same standard due to the complicated climate in our country. Therefore, it is necessary to fully accumulate empirical data on passive buildings in different regions to make passive building standards more in line with local conditions.
In this regard, Xie Yuanjian said that the main problem in severe cold areas is heating, which is very similar to the climatic environment of passive houses. However, the problems faced in areas with hot summers and cold winters are more complex, including heating, cooling and dehumidification. Shanghai is typically hot in summer and cold in winter. It needs heating in winter, cooling in summer, and dehumidification all year round. There is only a very short winter. If the indoor temperature is high, dehumidification or even humidification is not needed.
The problems we encountered in Nanjing and Shanghai were completely different when we arrived in Chengdu. Therefore, adapting measures to local conditions and combining local climatic conditions and local market conditions is a prerequisite in China, otherwise the development of passive architecture will definitely not do well. Then, how to use scientific and good technology based on local conditions to combine theory and practice?