At noon in summer, the sun is scorching hot. Walking into the Midea Yunyue Jiangshan Community in Beijiao Talent Town, Shunde District, Foshan City, Guangdong Province, there is no feeling of dryness and heat. Green trees, flowing water and trails separate dozens of buildings. "The design of the wide and empty east-west greening axis and the north-south building distance in the middle of the community has fully considered the lighting and air passages...usually, the temperature is lower than the outside temperature." said Zhou Ting, the project consultant.
Industrialization, greening, and intelligence are the three main directions for the high-quality development of my country's construction industry.
As a major carbon emitter, my country's construction industry and its upstream and downstream industries account for more than half of the country's carbon emissions.
Under the national "dual carbon" goal, green and low-carbon transformation has become an era proposition for my country's construction industry, and it is also a huge challenge for the real estate industry. Many companies are facing the pain of transformation and development.
Carry out industry-university-research cooperation, based on the design system of low-carbon and zero-carbon main axis and the research and development system of green prefabricated buildings and low-carbon construction technology, to create a green and low-carbon community, and reshape the relationship between people, buildings and communities - Lingnan Dadi , is quietly changing.
Building tall buildings in the workshop
In the Lingnan area of Futianli, the ground seemed to be on fire, sending out a scorching heat wave.
The reporter came to the Foshan Factory of Ruizhu Living in Longyongkou Village, Ronggui Street, Shunde District, Foshan City, Guangdong Province, and walked into the giant workshop of the factory with a height of more than 10 meters. The ceiling fan with a diameter of 4 to 5 meters continuously sends the wind to the workers. , The two automated production lines are running in an orderly manner.
On the assembly line, a worker is using a remote control to operate an automatic placing machine for pouring and tamping. On another production line, five or six workers are squatting on the mold table to perform rebar binding and water and electricity pre-embedding...even though the outdoor temperature is nearly 40 degrees Celsius In the high temperature, there is no scene of workers sweating in the workshop.
"I have been working on construction sites before, laying steel bars in the construction area enclosed by high scaffolding, exposed to the sun and rain, and it is very dangerous. It is also very dangerous to tie steel bars. Now the environment is much better. Our line is For laminated panels, they are produced like an automatic assembly line. Who would have thought that the house could be dismantled into parts like this?” said Wang Heping, a worker at the Foshan factory of Ruizhu Industrial.
"Here, we manufacture a variety of parts and components for the entire house, from floor slabs to balconies, according to industrialized production and standardized processes, and no longer have to work on site under the scorching sun and wind and rain." Bian Qiyuan, director of the Foshan factory of Ruizhu Industrial Co., Ltd. Said, "Factory manufacturing, construction site assembly, and industrialized manufacturing of houses are the major trends in the current green transformation of the construction industry."
"This part of traditional construction is the most polluting, the most wasteful, and also the process with the highest carbon emission. The production of prefabricated components of Ruizhu Living Industry realizes accurate, precise and visual control through informationization of the whole process and intelligent production. The carbon emission in production should be minimized as much as possible." Xiong Shixiao, a senior expert at the Prefabricated Construction Research Institute of Ruizhu, has nearly 30 years of experience in the prefabricated construction industry. He said that a variety of new technologies and materials are currently used in the manufacturing process. , For example, using steel and aluminum molds to replace wood molds can achieve 100% recycling of waste molds, effectively reducing resource waste and carbon emissions.
Bian Qiyuan said that there are currently less than 200 workers in the factory, and there are more than 80 projects in production. The annual construction volume is about 2 million square meters. For prefabrication, hundreds of workers are required to complete the same amount of work in traditional cast-in-place construction.
In CSCEC Yunxi Yuecheng, which was rated as a demonstration project of prefabricated buildings in Foshan City, two workers cooperated with the crane to hang the top of the prefabricated stairs on the beam. Several stair components with high steps were easily installed by workers.
On another working surface, two workers hung the "balcony" on the wall easily with the rotation of the crane.
Xiong Shixiao took the reporter to a large temporary shed outside the workshop.
He said it was an integrated modular building product that was being developed from which 30 to 40-story buildings were "produced".
Its prefabricated unit can be a kitchen, a bathroom, a room, and even the whole frame from the outer frame to the interior decoration is prefabricated in the factory, and then transported to the site for assembly by building blocks, and the factory prefabrication ratio can be as high as 90%.
Compared with traditional buildings, the pollution to the environment is almost zero, and production waste can be reduced by 90%, which is more green, environmentally friendly, energy-saving and low-carbon.
"Integrated modular space building opens up the design-main structure-internal installation full-chain composite service capability, creating a 'manufacturing + construction' mode of zero-carbon buildings." Xiong Shixiao said, "manufacturing + construction" mode is a requirement of the construction industry to protect the environment. It is also inevitable for the development of the market.
On July 13, Guangzhou's first prefabricated building production base in the whole industry chain - China Construction Intelligent Manufacturing Base was officially put into operation.
The base is located in Maxi Industrial Zone, Huadu District, Guangzhou. It mainly produces prefabricated columns, prefabricated wall panels, prefabricated bay windows, prefabricated balconies, laminated panels, laminated beams, prefabricated stairs and other products, with an annual output of prefabricated prefabricated buildings. The components are 150,000 cubic meters, accounting for a quarter of the annual production capacity of PC components in Guangzhou.
In Xiong Shixiao's view, using manufacturing thinking to make prefabricated buildings, transferring most of the traditional construction industry on-site construction operations to factories to complete, using prefabricated parts and components to assemble, build a house like a car. Realize carbon reduction and carbon saving throughout the life cycle.
Green technology landing
During the "13th Five-Year Plan" period, the level of energy conservation in the building sector in Guangdong Province has steadily improved.
The area of new energy-saving buildings in cities and towns is 950 million square meters, the area of energy-saving renovation of existing buildings exceeds 25 million square meters, and the total area of green buildings exceeds 500 million square meters.
People's demand for a green and healthy living environment continues to increase. So, how to better implement green and low-carbon technologies?
In January 2020, Midea Real Estate teamed up with the Architectural Design and Research Institute of Tsinghua University and the State Key Laboratory of Subtropical Building Science of South China University of Technology to sign the "Green and Low-Carbon Industrial Technology Research and Development Strategic Cooperation", and established the "Low-Carbon Healthy Living Environment Research Center" , compiling the Midea Real Estate Green Building Design Guidelines, formulating the Midea Real Estate Residential Building Energy-Saving Design Management Manual, etc., and jointly devote themselves to conducting research in the fields of human settlements, intelligence, green and low-carbon construction, and empowering the industry with innovation.
Among them, "Midea Real Estate Residential Building Energy Saving Design Management Manual" has been implemented in various Midea Real Estate projects.
Zhao Lihua, the head of the manual formulation team, the deputy director of the Thermal Engineering and Energy Saving Professional Committee of the Architectural Physics Branch of the Architectural Society of China, and a professor at South China University of Technology, said that in order to ensure green and energy-saving buildings, vacuum insulation board materials are used to reduce the thickness of insulation through efficient insulation performance. , reduce the public share by 2% to 3%, and improve the land utilization rate by about 2%; effectively avoid the heat transfer caused by air convection, achieve the effect of heat preservation and heat insulation, greatly improve the overall building energy saving level, bring energy saving, comfort and safety living experience.
"Green and low-carbon should ultimately serve people, which is the underlying logic of product research and development." said Cai Fangli, head of product research and development at Midea Real Estate. Midea Real Estate uses sunshine and airflow calculation software, combined with the needs of the owner's indoor life, such as ventilation and lighting. Each scene is carefully designed.
In terms of construction technology, the Department of Housing and Urban-Rural Development of Guangdong Province is planning to establish a provincial-level housing and urban-rural construction technology innovation committee to coordinate the development of construction technology innovation in the province, and build a number of provincial-level construction technology innovation platforms and 6 provincial-level construction technology innovation platforms. The base requires that the proportion of prefabricated buildings in new buildings in Guangdong cities and towns should reach 30%.
At the same time, Guangdong plans to create more than 90 technical centers at the provincial level and above, and cultivate no less than 10 Internet demonstration platforms for the construction industry.
Promote the establishment of a regional innovation pattern with Guangzhou and Shenzhen as the main engines, the Pearl River Delta region as the core, and the coordinated development of the coastal economic belt and the northern ecological region.
The Guangdong Provincial Department of Housing and Urban-Rural Development also revised the "Guangdong Provincial Department of Housing and Urban-Rural Development's Science and Technology Innovation Plan Project Management Measures" to further improve the management system for scientific and technological projects.
Formulate interim measures for the management of scientific and technological innovation platforms for housing and urban-rural construction in Guangdong Province, carry out the construction of provincial-level scientific and technological innovation platforms for housing and urban-rural construction, and improve the support capabilities of scientific and technological innovation.
Today, Guangzhou, Foshan, Zhuhai and other places have built large-scale high-star green building development clusters, and a number of national green building innovation award projects have emerged.
How far is a zero carbon community
In Guangdong, especially cities in the Guangdong-Hong Kong-Macao Greater Bay Area, near-zero carbon communities have become a hot topic, and many cities have put the exploration of near-zero carbon communities on their agendas.
In Guangzhou, it has explored the transformation path of community near-zero emissions; in Shenzhen, the first batch of 28 pilot projects in near-zero carbon emission areas launched last year can reduce carbon dioxide emissions by about 123,000 tons a year; in Zhuhai Hengqin, more Explore how to build a zero-carbon island...
The data shows that during the operation and maintenance phase of the building, its carbon emissions account for 22% of the entire industry.
In fact, a green and low-carbon community or a green and low-carbon building is supported by a huge technological system.
The community in the North District of Xiaolan Town, Zhongshan City has become the first community-type near-zero carbon emission pilot project in Guangdong Province. Carbon stations, charging piles and other low-carbon facilities.
According to reports, various low-carbon facilities and equipment in the community can reduce carbon dioxide emissions by about 100 tons per year.
"I have installed solar photovoltaic panels at home. In the past, my monthly electricity bill was 500 to 600 yuan. Now I can save about 150 yuan per month." Community resident Mai Jianquan said.
"The electricity consumption in public areas is high, and the public water bill is high... Community property companies often hear such feedback from owners." Liang Chao, the community property manager of Shunde Midea's Lingxian Mansion, said that Midea Real Estate and Ruizhu Technology jointly developed energy visualization independently. The management system realizes the access to the operation status and operation data of smart water meters, solar street lights, new energy vehicle charging piles, non-motor vehicle charging piles and other equipment. Balance quality of life.
"Only by making the benefits of low-carbon life visible, can property owners develop low-carbon behavior habits." Cai Fangli said that in the future community energy management, the digital visual "carbon trace" will not only allow the property management company to help the community Mastering energy consumption in one hand can also concretize people's "carbon" behavior, explore how to make "carbon" fall on everyone's head, and make owners feel the benefits of low-carbon life.
At present, the low-carbon community shown to the public is still in the preliminary practice of dispersing the research and development results of various stages in various projects. Only by forming a system integrated into a project or community can real near-zero carbon and zero-carbon results be formed. We are still a long way from living in a truly zero-carbon community.
Zhang Jianjun
Zhang Jianjun