Source | China Construction News

Recently, with the approach of pile foundation equipment, Jiangsu ProvinceNanjing CityThe kindergarten project in the coal yard area officially started. "The project aims to build a high quality campus, design and construction in strict accordance with green building design standards, and integrate green, energy-saving, and low-carbon concepts throughout the entire project design and construction process, and improve the overall energy-saving level of the building in multiple ways and angles." The relevant person in charge of the project said.

Since the beginning of this year, Jiangsu, Shanghai, Beijing, Hubei and other places have continuously improved the energy-saving and carbon-reducing level of new buildings by optimizing energy-saving and carbon-reducing designs, vigorously promoting ultra-low-energy buildings, increasing the proportion of star-rated green buildings in new buildings, and strengthening energy-saving reviews.

Optimizing Carbon Reduction Design to Improve Enclosure Performance

The "Work Plan for Accelerating Energy Conservation and Carbon Reduction in the Construction Field" proposes to optimize the energy-saving and carbon reduction design of new buildings, make full use of natural lighting and ventilation, adopt high-efficiency energy-saving and low-carbon equipment, and improve the thermal insulation and fire protection performance of the building envelope.

Jiangsu ProvinceIn the public building energy-saving design standards (draft for comments), energy-saving design should be combined with climate characteristics and natural environmental conditions, under the premise of ensuring the quality of the indoor environment, optimize the architectural design, improve the thermal performance of the envelope structure, reduce the building heating, air conditioning load; through the energy-saving design of heating, ventilation, air conditioning systems, reduce the energy consumption of cold and heat source systems and energy transmission and distribution systems; reduce the energy consumption of building water supply and drainage, lighting and electrical systems through energy-saving design of water supply and drainage and electrical systems. "The optimal energy-saving design scheme of different types of public buildings is determined through analysis, and then reasonable energy-saving targets are determined, and the energy-saving targets are decomposed into building envelope, ventilation and air conditioning, and lighting systems one by one." Jiangsu housing and urban construction department responsible person explained.

Newly ReleasedShanghaiThe energy-saving design standard for residential buildings not only puts forward the energy consumption and carbon emission quota indicators for energy-saving design of residential buildings, but also supplements, adjusts and improves the thermal performance of building envelopes, the performance parameters of energy-using equipment for heating, ventilation and air conditioning, the energy-saving design and performance parameters of electrical lighting and water supply and drainage systems, and stipulates the calculation methods and relevant calculation parameters of energy consumption and carbon emission of residential buildings. Among them, the prerequisites for the calculation of the thermal performance of the building envelope are updated. If the energy-saving design calculation is to be carried out, the heat transfer coefficient of each part of the non-transparent building envelope should meet the requirements of the energy-saving design standard. The heat transfer coefficient of the external window shall not be greater than 1.60W/(m2 · degree), and the heat transfer coefficient of the bay window shall not be greater than 1.40W/(m2 · degree). Sunshade measures shall be taken for the external windows of the building, and the comprehensive solar heat gain coefficient of the external windows after the sunshade measures shall not be greater than 0.35.

Increase the proportion of stars to promote ultra-low energy consumption

The key is to improve the level of energy saving and carbon reduction in new buildings and vigorously promote green buildings and ultra-low energy consumption buildings. Implemented a few days agoBeijingThe regulations on green development of buildings propose that new civil buildings shall implement the one-star or above standard for green buildings; new large-scale public buildings, civil buildings invested by government funds, and urban sub-center residential buildings shall implement the two-star or above standard for green buildings; new super high-rise buildings, buildings in the functional core area of the capital, and public buildings in the sub-center of the city shall implement the three-star standard for green buildings. Encourage the construction of industrial buildings in accordance with the standard of one star or more for green buildings.

Hubei ProvinceSpecific requirements have also been made in terms of green building star standards: centralized new affordable housing should be constructed in accordance with the requirements of not less than one star of green buildings; guide real estate projects to be constructed in accordance with the requirements of not less than one star of green buildings. New public welfare buildings invested by state-owned funds shall be constructed in accordance with the requirements of no less than two-star green buildings. People's governments at or above the county level may, in the light of local realities, implement higher-demanding green building grades.

Through systematic integration technology, ultra-low energy consumption buildings can save more than 90% of energy consumption compared with ordinary buildings, and are currently the world's advanced energy-saving buildings. In this regard,Beijing City Sub-centerCombined with urban renewal work, accelerate the promotion of ultra-low energy consumption buildings in key areas.Henan ProvinceIt is also proposed to carry out building energy-saving and efficiency-increasing actions, comprehensively improve the low-carbon level of green buildings, actively promote ultra-low energy consumption buildings, and encourage localities to explore the development of near-zero energy consumption buildings and zero-carbon buildings.

Strengthen supervision and review to ensure the quality of energy saving

Strict implementation of building energy conservation and carbon reduction standards is the primary factor for new buildings to meet the energy conservation standards. The competent departments of the industry should check the construction drawings and the acceptance of engineering projects, and strengthen the review of building energy conservation.

Guangdong ProvinceGuangzhou CityRecently, the quality of building energy-saving design and the implementation of construction drawing review have been carried out throughout the city. Understand and master the quality of building energy-saving design in the city and whether the construction drawing review stage and on-site construction stage strictly implement the building energy-saving policies, regulations, standards and specifications. Through inspection, find weak links, and continuously improve the quality level of building energy-saving design, construction drawing review, and problem rectification and implementation. Through "online and offline", check whether the design depth of construction drawing design documents related to building energy efficiency meets the requirements; whether the calculation of building energy efficiency indicators is standardized and accurate; whether the building energy efficiency design is reasonable and perfect.

In order to promote the improvement of building quality, Hainan ProvinceSanya CityThe Housing Urban and Rural Construction Bureau recently carried out a special inspection, focusing on checking whether the design documents in terms of building energy conservation implement the mandatory standards for building energy conservation and the application design of renewable energy; whether the construction unit has prepared the construction plan, whether the construction is implemented in accordance with the design requirements, and whether the energy-saving materials used have product quality certificates; whether the design change and review procedures are completed for changes involving building energy efficiency (such as glass specifications, thickness of insulation materials for roofs and walls, and structural practices, etc.).