At present, the proportion of non-energy-saving buildings in existing buildings in cities and towns in China is still very high, and the whole system of building energy efficiency is still incomplete. There are some outstanding problems, such as insufficient publicity of building energy-saving concept, cold outside and hot inside, slow development of building energy-saving in some cities, building energy-saving design is more important than construction, supervision and completion acceptance management, and there is a gap between building energy-saving level and developed countries. I. General situation of building energy conservation in China Promoting building energy conservation is conducive to fundamentally promoting the conservation and rational utilization of resources and energy, and has important practical significance for alleviating the pressure on resources and environment and developing circular economy. China's building energy efficiency started late, and the building energy efficiency standard was fully implemented in 2005. In recent years, a lot of work has been done in popularizing building energy-saving technology, establishing relevant standard system and strengthening legislation. Building energy conservation has achieved remarkable results and made important contributions to the country's goal of energy conservation and emission reduction. However, at present, the proportion of non-energy-saving buildings in existing buildings in cities and towns in China is still very high, and the whole system of building energy efficiency is still incomplete. There are some outstanding problems, such as insufficient publicity of building energy-saving concept, cold outside and hot inside, slow development of building energy-saving in some cities, building energy-saving design is more important than construction, supervision and completion acceptance management, and there is a gap between building energy-saving level and developed countries. In 20 15, China's green buildings maintained a strong development momentum, and the number of projects with green building signs increased significantly. According to the announcement issued by the Ministry of Housing and Urban-Rural Development, as of 20 15, 12 and 10, there were 3,636 national green building sign projects, of which 1098 was added in 20 1098, a record high in the same period of the previous year. The rapid development of green buildings can not be separated from the strong support of policies. By the end of 20 15, ** 3 1 provinces and cities in China have formulated green building implementation plans and adopted various mandatory and encouraging policies, and some provinces have also raised the development of green buildings to the legal level. However, due to the gradual promotion of green buildings in China since 2008, there are still some problems such as low development level and quality, small overall scale, unbalanced regional development and so on, and most of them remain in the design stage, and the comprehensive benefits of green buildings have not been fully exerted. Promoting housing industrialization and developing prefabricated buildings are effective ways to realize energy saving and emission reduction in the construction field. 20 15 China's housing industrialization has made great progress. The top-level design was further improved, and the Ministry of Housing and Urban-Rural Development issued the Notice on Printing and Distributing the National Building Standard Design System for the Modernization of Construction Industry, which means that the national standard design system has been established for the first time to promote industrialization and provide strong technical support for the development of industrialization. Local governments attach great importance to it and continue to increase support, and relevant policies are constantly introduced. According to incomplete statistics, more than 30 provinces and cities have issued special guidance and supporting measures. As the main body of the market, enterprises have changed their previous wait-and-see attitude, followed the general trend to test water industrialization, actively promoted the concepts of prefabricated houses and prefabricated buildings, intensified research and development, strived to open up the market, and accelerated the development of industrialization. With the joint efforts of all parties, the area of industrial housing has increased substantially, and the industry as a whole has shown a good development trend. In 20 15, the newly started area of prefabricated buildings in China is about 35-45 million square meters, and more than 0/00 prefabricated component factories will be built in three years. There are 56 national housing industrialization bases in China, 1 1 pilot cities. Of course, compared with developed countries such as Europe, America and Japan, domestic housing industrialization is still in the primary stage, and the overall process is relatively slow. It needs to be further strengthened in improving technical standards, building the whole industrial chain and breaking through key technologies. Second, the overall situation of building energy efficiency in Beijing in 20 15 years, the standard level and quantity of new energy-saving buildings in Beijing remained the national leader, the heating metering and energy-saving renovation of old residential areas exceeded the task, the number of green building evaluation and labeling projects and renewable energy buildings continued to increase, the project area that had been included in the city's industrialization plan exceeded the planned task, and the scale of fully assembled houses ranked first in the country. In years of development practice, Beijing has gradually embarked on a green development road that meets the needs of urban and rural construction in the capital. Through the comprehensive implementation of a series of measures, such as new building energy saving, existing building energy saving renovation, rural building energy saving renovation, renewable energy building application, public building energy saving operation management, and promoting green building and housing industrialization, building energy saving has achieved remarkable results, but there are still some shortcomings, which are reflected in the following aspects: policies related to building energy saving and building materials have been well implemented, and some work needs to be continued. Since Beijing took the lead in implementing the 75% energy-saving design standard for residential buildings in China in 20 13, new urban civil buildings have been designed and built in strict accordance with the energy-saving standards, and the proportion of energy-saving civil buildings ranks among the top in the country. In 20 15, 30,086,400 square meters of new civil buildings were put on record, including/kloc-0,680,840 square meters of residential buildings and/kloc-0,3278 square meters of public buildings. Energy-saving renovation of existing residential buildings 1240450 square meters, exceeding the target tasks, effectively reducing energy consumption and improving living comfort; The newly started solar hot water system has a building application area of 6.5438+0.40607 million square meters, showing a steady growth trend. In the special inspection of mixing stations in the city, the qualified rate of sampling inspection increased by 12 percentage points year-on-year, and most mixing stations have been upgraded according to the new standards. The popularization and application of ready-mixed mortar in the city's construction engineering field has been accelerated, the usage has increased greatly, and the number of suppliers has increased greatly. However, in foundation pit treatment, rail transit engineering and home decoration engineering, the phenomenon of mixing concrete or mortar on site still exists. In addition, the special work of building energy conservation is still mainly promoted by the government, and the energy-saving renovation of existing residential buildings mainly depends on financial capital investment, and the market vitality is relatively insufficient. Public building owners and property owners lack effective management, and the progress of energy-saving renovation of existing public buildings is slow. The implementation of market behavior credit evaluation of building materials supply enterprises is not ideal, and building materials industry has a long way to go to establish honesty awareness and realize market behavior credit management. The development of green buildings is in the forefront of the country, but it faces some obstacles that restrict development. In recent years, Beijing has actively promoted the development of green buildings, leading the country to implement the requirements of popularizing green buildings in new buildings for one week. The number and area of projects with green building evaluation marks rank among the top in China, and the proportion of projects that continue to apply for operation marks in design marks is higher than the national average. At present, a standard system covering the whole process of green building design, construction, acceptance and evaluation has been formed, a number of innovative demonstration projects of green buildings with great influence and strong radiation have been created, and a number of integrated design consulting enterprises with good technical capabilities and qualifications have been formed. The expansion of green buildings from single buildings to green parks has promoted large-scale development. Of course, in the process of further promoting green building, there are still some obstacles from the internal and external environment of the industry, such as the uncoordinated application of green building technology and cost control, the gap between design scheme and actual operation, imperfect incentive measures and restraint mechanism, and the need to improve technical support capacity, which need to be promoted in coordination from macro-policy system, technical norms and standards, and enterprise's own capacity building. The housing industrialization has transited from the pilot period to the promotion period, but there are still some problems and deficiencies. With the implementation of the policy of full coverage of affordable housing industrialization and the requirement that housing industrialization be included in the land supply conditions, the scope of housing industrialization in Beijing has been further expanded, and the pilot period has been encouraged to shift to the policy-required promotion period. Improve the relevant standard system. Around the design, production, construction and construction management of residential industrialization, seven Beijing local standards and a number of technical management requirements and guidelines have been issued and implemented. Remarkable achievements have been made in technological innovation. More than 30 key technologies and complete sets of technologies for housing industrialization have been developed, and many important technologies have been popularized and applied in affordable housing and new rural construction, playing a strong demonstration and leading role. Initially formed a residential industrialization group integrating R&D, design, production, construction and operation management, and the industry resources were effectively integrated. Of course, there are still some problems and shortcomings in the development of residential industrialization. For example, the current management system of bidding, construction and acceptance is not suitable for housing industrialization because of the traditional cast-in-place construction method, which needs further innovation; The valuation basis and norms are relatively lacking, and the problem of cost increase needs to be clarified; Design, production, construction and other links are not connected enough, and the industrial chain needs to be integrated; The ability of market players needs to be strengthened, and the recognition of consumers needs to be improved. Three. 20 15 main measures to improve building energy efficiency and building materials management level in Beijing. The legislation on the use and management of building materials has taken root. The Regulations on the Use and Management of Building Materials in Beijing has been listed as a research project of government regulations planned by the municipal government. The declaration of information on the purchase and supply of building materials, credit management of building materials supply enterprises, and publicity of information on the use of building materials have been listed in the Regulations on the Quality of Construction Projects in Beijing. The demonstration project of bulk cement has reached the domestic advanced level, and the scientific research and technical transformation project of wall materials have been promoted in an orderly manner, which has provided strong technical support for further promoting building energy conservation. "Beijing Building Energy Saving Record, Special Fund for New Wall Materials and Special Fund for Bulk Cement Management Information System" has been officially put into operation in the whole city, which has realized information sharing among different departments and self-help inquiry of business progress. We will build a credit evaluation system for the quality of new products of Beijing building materials suppliers and a management system for the use of recycled building waste products, upgrade and reform the system of building energy-saving design review and special acceptance filing, improve the credit evaluation system for building materials suppliers' market behavior, and incorporate the application for the collection and return of special funds for new wall materials and bulk cement into the city's administrative examination and approval catalogue management system, so as to improve the "one-stop" administrative examination and approval mechanism. Vigorously promote the energy consumption quota management of public buildings. According to the Work Plan of Beijing Public Building Energy Consumption Limit and Differential Electricity Price (Trial) and the Interim Measures for Beijing Public Building Energy Consumption Limit Management, 13237 public buildings with a single building area of more than 3,000 square meters and a public building area of more than 50% are included in the energy consumption limit management to achieve management coverage. A big data platform reflecting the monthly electricity consumption characteristics of public buildings in Beijing has been initially established, including the area, type, monthly energy consumption data and distribution characteristics of public buildings, as well as relevant information such as building ownership and operation management units. On this basis, the power consumption quota was issued and the first annual assessment was completed. Promote the pilot demonstration of ultra-low energy consumption buildings. In order to put forward the building energy-saving goal that is more suitable for Beijing, in 20 15, Beijing started the research and demonstration of ultra-low-energy building technology and standards, signed the Strategic Cooperation Agreement on Promoting the Development of Ultra-low-energy Building with the Ministry of Housing and Urban-Rural Development, carried out the research on the standard system of ultra-low-energy building, started the demonstration of ultra-low-energy building projects, and implemented the financial incentive policy. Actively carry out personnel training and technical services, and it is estimated that 300,000 square meters of ultra-low energy consumption demonstration project will be organized and implemented before the end of 20 18. Improve the standard system of green buildings. The newly revised Design Standard for Building Energy Efficiency, Evaluation Standard for Green Building and the newly formulated Code for Construction Acceptance of Green Building Projects were promulgated and implemented to better regulate and guide the development of building energy efficiency and green building. Innovate the implementation mechanism of green building standards in engineering construction management, effectively integrate the implementation ways of green building standards in the existing engineering management system, and ensure the implementation quality and level of green building projects through standard guidance. The compilation of Beijing Green Building Project Valuation Basis-Budget Quota has been started, which has improved the related contents of building industrialization, covering green buildings, energy-saving insulation, prefabricated buildings and other projects, and will provide valuation basis for green building project construction. Promote housing industrialization and accelerate development. The newly-built affordable housing will fully "implement green building action and industrialization construction" to achieve full coverage of finished products delivered by fully renovated affordable housing. Carry out the evaluation of "planning and design scheme and industrialization implementation scheme" of affordable housing. Revise the Detailed Rules for the Evaluation of Industrial Residential Parts in Beijing, and carry out the catalogue evaluation of certified products of industrial residential parts. Release the modular coordination standards for interior design of public rental housing, the design standards for full decoration of residential buildings, the design specifications for assembled frames and frame-shear wall structures, and further improve the relevant standards for housing industrialization. Continue to strengthen international scientific and technological cooperation. We will continue to implement the fifth Global Environment Facility grant project "Energy Saving and Renewable Energy Application in Urban Buildings in China", and actively promote advanced theoretical achievements and practical experience at home and abroad through international exchanges and cooperation. Promote project cooperation, information exchange and resource sharing between Beijing and other international advanced cities, promote the transformation and implementation of policies, standards and technical research results on building energy efficiency and green buildings, promote the pilot to achieve substantive results, and promote the development level of building energy efficiency and green buildings in Beijing to a higher international level with an international vision. The Stone of Other Mountains Jiangsu and Zhejiang issued local laws and regulations to promote the development of green buildings. On March 27th, 20 15, Jiangsu Province deliberated and passed the Regulations on the Development of Green Buildings in Jiangsu Province, which is the first local regulation on green buildings in China. The regulations require that all new civil buildings in Jiangsu Province should adopt green building standards of more than one star, and large public buildings invested by state-owned funds or financed by the state should adopt standards of more than two stars. The requirements of green building standards should be controlled and implemented from planning, design, licensing, drawing examination, construction, supervision and acceptance, and it is technically mandatory to provide policy support for green buildings and related technologies that meet the requirements. 20 15, 15, Zhejiang Province deliberated and passed the Regulations on Green Building in Zhejiang Province. The regulations stipulate the planning, construction, operation and transformation, technical application, guidance and encouragement of green buildings, among which the highlights are: promoting new construction industrialization, establishing an implementation mechanism combining gradual classification with gradual zoning, establishing an existing building energy consumption supervision and transformation mechanism, promoting the application of building information model technology, and establishing a promotion mechanism for fully renovated finished houses.
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