Recently, at the 10th National Conference on Near-Zero Energy Consumption and Zero-Carbon Buildings in 2023, the second phase of China Energy Construction Building was awarded the "14th Five-Year Plan" National Key R&D Program Project Science and Technology Demonstration Project, and the demonstration type is near-zero carbon buildings. The project is developed by China Energy Construction City Investment and Development, hereinafter referred to as "Energy Construction Urban Development"), which is another masterpiece of Energy Construction Urban Development in the field of green buildings.
A number of advanced technologies help near-zero carbon buildings
The second phase of China Energy Building is located in the East Fourth Ring Road, Chaoyang District, Beijing, with an above-ground construction area of 27,307 square meters, a total of 11 floors above ground, and a building height of 5635 meters.
In order to achieve the goal of near-zero carbon buildings, the project has carried out dual adjustment of building load and building energy consumption by greatly reducing load, improving system efficiency, adjusting energy consumption structure, developing photovoltaic resources, real-time data feedback, low-carbon office guidance and other technical routes, so as to achieve dual control of building energy consumption and building carbon emissions.
The project uses a number of advanced technologies, such as an ultra-high thermal performance curtain wall system to reduce heat loss. The ultra-high thermal performance curtain wall system adopted in the project is the highest requirement for ultra-low energy consumption buildings in the industry, and it is also the first batch of large-scale and super-large vacuum glass curtain wall application projects in Beijing.
Ground source heat pump system and photovoltaic power generation system, adjust the energy consumption structure. The project adjusts the energy structure through the ground source heat pump system and photovoltaic power generation system, and relies on a number of internal technical achievements such as geothermal, integrated photovoltaic, photovoltaic storage, direct and flexible energy construction, and builds an energy management platform for the first and second phases of linkage, which embodies the awareness of energy conservation everywhere and fully demonstrates the integration of energy construction.
Smart energy monitoring and management system to improve energy efficiency. The project installs a smart energy monitoring and management system, which is integrated with the energy building park, collects energy information, controls the operation status of the system, and takes scheduling measures in a timely manner to achieve the purpose of improving energy efficiency.
With the support of a series of measures, the comprehensive carbon reduction rate of the project has reached 5743%, and the carbon emission intensity of buildings reached 1967kg CO2 m2A, which meets the requirements of the near-zero carbon building grade in the national standard "Technical Standard for Zero-carbon Buildings". It is expected that the project will reduce carbon dioxide emissions by more than 724 tons per year after completion, significantly reducing the level of carbon emissions.
Be an explorer and leader of green buildings
In fact, in the development plan of the enterprise that can build the city and develop, green and low-carbon is one of the core dimensions of its future high-quality development. It can be seen that Nengjian Urban Development has achieved rich results in related fields.
In terms of technological innovation, based on the energy background of China Energy Construction, Nengjian Urban Development has developed a community low-carbon operation energy management platform based on the overall planning, combined with the pre-layout of energy consumption and the intelligent control of the middle platform in the later stage.
The platform mainly has real-time monitoring, energy-saving analysis, energy-saving control and other functions. The real-time monitoring module can monitor the indoor environment, fresh air unit monitoring, heat pump host, geothermal field and system energy consumption in real timeThe energy-saving analysis module analyzes the energy consumption, system load, host load, operating cost, system energy efficiency, geothermal balance, transportation energy efficiency, energy conservation and environmental protection of the project system, and formulates automatic operation strategies. Energy-saving control can monitor and control the operation of the main equipment of the whole system in real time, so as to achieve real unattended;**The management and control cloud platform analyzes, evaluates and manages the key management indicators of the entire system, and realizes energy consumption analysis, load analysis, energy efficiency analysis, energy metering, intelligent operation and real-time alarm.
At present, this low-carbon smart energy management platform has been widely used, one of the projects has been completed and operated for more than one year, and four projects are under construction and implementation, with a cumulative implementation area of about 1.1 million square meters.
In terms of standard guidance, as a member enterprise of China's energy construction and construction sector, energy construction and urban development has carried out in-depth research and practice on construction and energy topics from the fields of materials, construction, indoor and outdoor.
In 2022, as the leading unit, Nengjian Urban Development will cooperate with 3 external scientific research institutions and 7 brother units to unveil the key R&D project "Research on Key Technologies for Building and Energy Integration", with the overall goal of building a technical system for building and energy integration, decomposing the key technologies of building and energy integration for low-carbon and zero-carbon building community construction from the perspective of the whole chain layer by layer, and striving to create a demonstration of building and energy integration technology.
In terms of indoor air quality, in 2017, Nengjian Chengfa and Tsinghua University jointly applied for the project of "Research on Basic Theory and Key Technologies of Building Indoor Air Quality Control", and in September 2021, the project won the first prize of Beijing Science and Technology Progress Award in 2020, and the results of the project were directly applied to 52 domestic and foreign standards, promoting the development of healthy buildings and green buildings.
Contribute to the green transformation of the construction industry
As a "major carbon emitter", in recent years, building carbon emission reduction and green transformation of the construction industry have received attention from policies and markets. In this context, real estate development companies have increased their green buildings, and the exploration of urban development has also become large-scale.
According to the data, the green building certification coverage rate of Nengjian Urban Development Development Project has achieved 100%, and more than 30 green building certification marks have been obtained, with a cumulative green building certification area of nearly 5.5 million square meters. According to estimates, the green building can save 26 percent of energy per year40,000 tons of standard coal will reduce carbon dioxide emissions by 180,000 tons, which is equivalent to planting 10 million trees every year.
With a long way to go in reducing carbon emissions in buildings, and positioning itself as a flagship platform for China's first-class competitive characteristic real estate developers, urban comprehensive operators and real estate business investment, we will actively undertake corporate social responsibility, rely on CECC's strong foundation in the energy sector, continue to promote R&D and innovation in the field of green buildings, explore the path of green transformation and development of the construction industry, and contribute to the green transformation and high-quality development of the economy and society.