Green, low-carbon transition and ultra-low energy buildings will become mainstream in my country

　　Technology supports carbon peak carbon neutrality

　　◎Reporter Hua Ling

　　my country has a vast territory, straddling hot, temperate and cold climate zones from north to south.

With the continuous increase in the total amount of buildings in different regions and the improvement of living comfort, compared with the energy consumption of industry and transportation, the energy consumption of buildings is on a rising trend.

　　In recent years, the state has successively promulgated relevant policies to support the construction of ultra-low-energy buildings, clearly proposing “actively carry out demonstrations of ultra-low-energy building construction in different climate zones across the country” and “develop ultra-low-energy building communities (parks) and near-zero energy-consuming buildings. Various provinces and cities have started to explore and construct.

So, what is the current development of ultra-low energy buildings in my country?

　　Building energy efficiency has made outstanding contributions to reducing carbon emissions

　　"The contribution of building energy conservation to reducing carbon emissions is very prominent." The relevant person in charge of the Standards and Rating Department of the Ministry of Housing and Urban-Rural Development pointed out recently.

　　Direct carbon emissions in the field of urban and rural construction mainly include carbon emissions from the use of fossil energy sources such as heating, cooking, and domestic hot water in buildings.

With urbanization, the improvement of people's living standards, and the adjustment of industrial structure, the total amount and proportion of carbon emissions in urban and rural construction will continue to rise.

Green and low-carbon transformation has become the main goal of the development of the construction industry.

　　The State Council issued the "13th Five-Year Plan for Energy Conservation and Emission Reduction" in 2016, proposing to "launch ultra-low energy and near-zero energy building pilot projects"; the Ministry of Housing and Urban-Rural Development issued the "13th Five-Year Plan for Building Energy Conservation and Green Building Development" in 2017 "Planning", proposes to "actively carry out the demonstration of ultra-low energy building and near-zero energy building construction...promote the centralized and contiguous construction of ultra-low energy buildings in parks and neighborhoods where conditions permit, and encourage the development of pilot projects for zero-energy building construction"; 2021 In March, the "14th Five-Year Plan and the Outline of Long-term Goals for 2035" proposed to carry out major project demonstrations such as near-zero energy consumption buildings and near-zero carbon emissions.

　　"According to the decision and deployment of the Party Central Committee and the State Council to peak carbon dioxide emissions before 2030, the main idea of ​​carbon peaking in urban and rural construction is to improve the energy conservation of buildings and infrastructure; vigorously promote the application of renewable energy." The relevant person in charge of the Ministry of Housing and Urban-Rural Development said. .

　　According to Xu Wei, the chief engineer of the Chinese Academy of Building Research, a zero-energy building refers to a building that does not consume conventional energy and is entirely dependent on solar energy or other renewable energy sources.

In the process of building towards the zero energy consumption goal, according to the difficulty of achieving its energy consumption goal, there are three forms: ultra-low energy building, near zero energy building and zero energy building, or a building Three stages of future development on the road of energy conservation.

　　Experts pointed out that, compared with conventional energy-saving buildings, ultra-low energy buildings that apply passive building design and active high-performance energy systems reduce the energy consumption of buildings during use, indirectly reduce pollutants and greenhouse gas emissions, and contribute to achieving carbon peaks. The goal of carbon neutrality is significant.

It can be seen that ultra-low energy buildings will become mainstream buildings in the future.

　　my country will vigorously promote ultra-low energy consumption buildings

　　Based on my country's energy structure adjustment, climatic characteristics and residents' living habits, provinces across the country are currently undergoing joint research by industry, academia and research, and propose ultra-low energy building technology systems suitable for different climate zones in my country, and have achieved fruitful and innovative results.

　　The relevant person in charge of the Ministry of Housing and Urban-Rural Development said: "After nearly 30 years of continuous exploration and efforts, China has formed a relatively systematic energy-saving technology system and standard system. Ultra-low energy buildings can make full use of natural ventilation and natural ventilation by adapting to climatic characteristics and site conditions. Technical measures such as daylighting and thermal insulation of the envelope structure, and the use of high-efficiency energy equipment to minimize the energy consumption of building heating, air conditioning, and lighting. On the basis of ultra-low energy buildings, the addition of technical measures such as the application of renewable energy buildings can achieve nearly Zero energy, zero carbon building."

　　It is understood that under the encouragement of a series of policies, China’s ultra-low energy buildings have been promoted quickly, and representative demonstration projects have been completed: China Academy of Building Research near-zero energy consumption demonstration building, the first zero energy consumption in the hot summer and warm winter area Building comprehensive office buildings-Zhuhai Xingye New Energy Industry R&D Building, Tianyou Zero House near-zero energy consumption farm house demonstration project that preserves rural ecology, Sino-German Qingdao Ecological Park Technology Center, Hebei Gaobeidian New Train City, etc., these buildings High-tech such as high-performance new enclosure structure, solar building integration, smart building micro-energy grid and ground source heat pump are adopted.

　　According to Zhang Shicong, a researcher at the Chinese Academy of Building Research, during the 13th Five-Year Plan period, my country’s special financial incentives for ultra-low energy buildings exceeded 1 billion yuan, which played an important role in guiding them from pilot demonstration to scale promotion. /Nearly zero energy building projects exceed 10 million square meters, driving a 10 billion incremental industry scale, and will lead the building energy-saving industry to high-quality, large-scale, and sustainable development.

The large-scale promotion of ultra-low energy consumption buildings will have an important supporting role for my country’s "carbon peak in 2030 and carbon neutrality in 2060". The industrialization of upstream and downstream products will bring about 5 trillion to 10 trillion new GDP expectations. The ultra-low/near-zero energy building technology system has significant promotion value and industrialization prospects, and further research and development and innovation are needed to promote it towards zero carbon and zero energy consumption.

　　The relevant person in charge of the Ministry of Housing and Urban-Rural Development said: “In the next step, my country intends to continuously improve the level of building energy-saving standards through the formulation of mandatory standards, and comprehensively promote ultra-low-energy buildings in suitable climate zones, so as to contribute to the early realization of carbon peaks in urban and rural construction. "