How to achieve zero energy consumption and zero carbon? Exploring the First "Double Zero" Architecture in China

Source: Beijing Daily

Original title: How to achieve zero energy consumption and zero carbon? Journalists enter the sub center planning exhibition hall to explore the first "double zero" building in China

At the intersection of the five rivers in the sub center of the city, the first "double zero" building with a steel structure and full curtain wall system in China - the sub center planning exhibition hall is under vigorous construction.

Double zero "refers to zero energy consumption and zero carbon. The building area of the museum is 7583.78 square meters, with an annual energy consumption of 315000 kilowatt hours and an annual power generation of 900000 kilowatt hours. The comprehensive energy-saving rate of the building reaches 100%; The annual carbon emission is about 370.73 tons, and the annual total carbon reduction is 724 tons (about 1811 acres of forest carbon sequestration). The overall building is "carbon neutrality". So, what technology ensures the achievement of the "double zero" goal?

Install 'Super Power Bank' on the roof

The sloping roof of the planned exhibition hall is not paved with traditional ceramic tiles, but with matte like dark brown light photovoltaic tiles, similar to ancient copper ware. The flat roof is equipped with mesh like coffee colored glass based photovoltaic panels. The integration of photovoltaic buildings is the first keyword for achieving "dual zero" architecture.

Photovoltaic tiles are not only easy to install, but also capable of insulation, thermal insulation, and power generation. They also have good low-temperature impact resistance and excellent corrosion resistance. "Xu Youyue, the project manager of the 160 plot of the Urban Sub Center of China Construction First Bureau, introduced that the 160 plot of the exhibition hall is equipped with approximately 6000 square meters of photovoltaic equipment, with an annual power generation capacity of up to 150 kilowatt hours/square meter. Photovoltaic power generation technology is like a "super power bank" that continuously converts solar energy into electricity. The electricity generated by photovoltaic watts adopts a "spontaneous self use+surplus electricity grid connection" mode, achieving the overall goal of "zero carbon exhibition halls and low-carbon office areas". At present, welding and tile hanging operations have been concentrated on the photovoltaic roof.

At the same time as external "charging", high-performance insulation materials and high-performance green waterproof and gas barrier membranes with air tightness level 8 and water tightness level 6 have put on a "scarf" for the planned exhibition hall, making it "impermeable in winter and not hot in summer". The thickness of external wall insulation materials is generally between 100mm and 130mm, while we have increased the thickness of exhibition hall rock wool boards to 210mm, resulting in better insulation and insulation effects. This can reduce the annual energy consumption of the exhibition hall from 613800 kilowatt hours to 315000 kilowatt hours. Compared to the benchmark building's annual energy consumption of 670000 kilowatt hours, the energy-saving rate of the building body reaches 53%. "Production manager Tang Jinqi said, under the combined effect of the photovoltaic" super power bank "and" scarf ", The comprehensive energy-saving rate of the exhibition hall has reached 100%, filling a gap in the domestic zero energy building system.

Building Green and Environmentally Friendly Buildings with Building Blocks

At the construction site of the planned exhibition hall, there is a green dustproof net on the ground, and prefabricated curtain walls, glass and stone are stacked in an orderly manner. The construction site is clean and tidy, with no sparks of material cutting or piles of construction waste visible, completely different from the traditional impression of a construction site. Xu Youyue said, "The exhibition hall adopts prefabricated building technology, which effectively reduces the waste of materials and garbage on site."

Prefabricated building technology is the second key word to realize "double zero" building.

The prefabricated building process is to customize and cut in advance in the factory, and then transport to the construction site for "building blocks" combined installation. The process is simple, green and environmentally friendly, but the requirements for the error of prefabricated components and the accuracy of on-site construction are very high. "The construction error of cast-in-place concrete structures is often measured in centimeters, and our prefabricated building process has achieved the improvement of accuracy control from millimeters to silks.".

The "double zero" construction technology can be replicated

"Smart brain" is the third key word for achieving "double zero" architecture. The innovation of the sub center planning exhibition hall project adopts a series of hard core smart technologies such as big data and cloud computing, empowering building intelligence with technology, creating a "super brain" for intelligent construction, ensuring the "double zero" operation of the museum throughout its design, construction, maintenance, and operation lifecycle.

"In order to efficiently manage workflow and data storage, we independently developed and applied the blockchain based fine engineering information management system, realizing the" zero "breakthrough of" building+blockchain "." Xu Youyue introduced that in the blockchain management system, all data and project files collected and uploaded through intelligent devices such as the Internet of Things, 3D scanner, lofting robot have their own "ID cards", Once stored, it cannot be tampered with, ensuring the security, authenticity, and reliability of project data; The expert library embedded in the system can form specialized solutions for the project. The Internet of Things technology and smart energy flexible management mode in buildings can achieve intelligent linkage between temperature and humidity control and weather environment, as well as intelligent linkage between building environment and humanized needs, reflecting the innovative concept of intelligent buildings adapting to and utilizing nature. Moreover, technical personnel are deeply developing and continuously optimizing AI intelligent algorithms, gradually equipping AI with the ability of "continuous learning", and the quality and efficiency of system review will continue to improve accordingly.

At present, the exterior curtain wall of the project has been completed, and this "double zero" building with three floors above ground and three floors below ground is taking shape. “

The planned exhibition hall of the sub center showcases the cultural heritage and characteristics of the sub center in a square and elegant, rustic and atmospheric architectural form. This' Double Zero 'exhibition hall is benchmarking against international first-class standards and showcasing a new form of zero carbon architecture to the world Tang Jinqi stated that with the continuous deepening of construction, the construction technology and experience of "Double Zero" buildings are continuously accumulated and have strong replicability, which can provide more possibilities for "Double Zero" construction projects to bloom throughout the country. (Jie Yazhen)