With the help of the “east wind” of old community transformation and urban renewal, transforming the current large-scale existing buildings in China into low-carbon or zero carbon buildings will play a positive role in effectively controlling the carbon emissions of buildings in the long term.
From this, it can be inferred that the green transformation of existing buildings is the key measure to achieve carbon neutrality in the construction industry as a whole.
Achieving the double carbon goal involves work in all fields.
Therefore, if the construction industry wants to achieve the double carbon goal, it needs to make efforts in many ways.
In terms of urban construction, it is estimated that the developable capacity of urban building roof photovoltaic is 830 million kwh, and the annual power generation can reach 1.23 trillion kwh, which can meet 30% – 40% of the power consumption of urban buildings.
Strengthen the application of renewable energy and develop the application of renewable energy based on photovoltaic application, that is, make full use of the roof space of urban and rural buildings and other external surfaces that can receive solar radiation to install photovoltaic cells, so as to solve the problems of insufficient time and space resources for large-scale development of photovoltaic.
Using green building materials to promote the establishment of low-carbon, environmental friendly, energy-saving and efficient green construction can truly realize the transformation of building materials industry to low-carbon industry.
Industry experts pointed out that China’s total building volume continues to grow.
According to the statistics of China Building Energy Conservation Association, the carbon emission proportions of the above three stages are 28%, 1.0% and 21.6% respectively.
According to industry experts, according to preliminary estimates, the building roof area in rural areas of China currently reaches 27.3 billion square meters.
It is believed that with the concerted efforts of all parties and the “same frequency resonance”, the construction industry will certainly be able to reverse the development mode of “large-scale construction, large consumption and large emission”, and achieve the double carbon target task according to the time node..
At the same time, green building materials are also the material basis of green buildings.
The “14th five year plan for building energy conservation and green building development” issued by the Ministry of housing and urban rural development also puts forward the development goal, that is, by 2025, more than 50 million square meters of ultra-low energy consumption and near zero energy consumption buildings will be built, and the proportion of prefabricated buildings to new urban buildings in that year will reach 30%.
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Accelerate the certification and application promotion of green building materials, and strengthen the research, development and application of new cementitious materials, low-carbon concrete, wood and bamboo building materials and other low-carbon building materials.
Increasing the proportion of green building materials and building materials industry is the basis for supporting urban construction in China, and provides important support for improving living conditions, managing ecological environment and developing circular economy.
We should make good use of the invisible hand of the market, carry out the identification business of building energy-saving technology with market-oriented means, promote the building energy-saving and environmental protection industry fund, and promote the new technology of building energy-saving and carbon reduction from the perspective of market driving by means of investment and financing of building energy-saving technology.
According to the data, the total carbon emission of the whole construction process in China is about 5 billion tons, accounting for 50.6% of the national carbon emission.
Promote energy-saving technology and equipment, carry out the construction of energy management system, and achieve energy conservation and efficiency.
Among them, the construction industry is the key area to reduce carbon emissions and will play a pivotal role in the process of achieving the double carbon goal.
Relevant laws, regulations and policies shall be formulated in a timely manner to promote the promotion and application of energy-saving and carbon reduction technologies in the construction industry in terms of financial and tax support, price policy, energy-saving and carbon reduction standards, energy-saving and low-carbon labels, etc.
If properly utilized, the annual power generation can reach 2.95 trillion kwh, accounting for 23% of the total power supply in China in the future.
The development of prefabricated green buildings with steel structure and wood structure is the construction mode that best conforms to the concept of carbon neutrality, conforms to the national green development and sustainable development concept, and is more conducive to reducing carbon emissions in the construction industry and helping to achieve the double carbon goal.
In the process of achieving the double carbon goal, the role of the construction industry is crucial.
Compared with new buildings, the green transformation of existing buildings has greater potential for carbon emission reduction.
The “fourteenth five year plan” for building energy conservation and green building development also proposes to complete the goal of more than 350 million square meters of energy-saving transformation of existing buildings by 2025.
It can be said that the existing buildings are the main reason for the large carbon emissions during the construction operation period.
As a major carbon emitter, the low-carbon transformation of the construction industry has become the consensus of all walks of life.
Therefore, it is urgent to reduce building energy consumption and carbon emissions and vigorously develop green buildings including ultra-low energy consumption buildings, near zero energy consumption buildings and prefabricated buildings.
At present, 16 billion square meters of new buildings are buildings with low energy utilization rate each year.
However, at present, the building materials industry is still in the state of high energy consumption and high carbon emission.
Therefore, reducing the carbon emission of the building materials industry and increasing the proportion of green building materials in buildings play an important role in realizing the double carbon goal of the whole construction industry.
Policy and market “two wheel drive” policy support of national and local governments is an important condition for the construction industry to achieve the double carbon goal.
Building materials enterprises should be encouraged to use fly ash, industrial waste residue and tailings residue as raw materials or cement mixtures.
Therefore, the promotion of renewable new energy systems with roof photovoltaic as the core in the vast rural areas can greatly help to achieve the goal of carbon peak and carbon neutralization.
According to the data, China’s existing building area exceeds 66 billion square meters, and due to the low quality standards and untimely maintenance during the construction period, more than 60% of the buildings are non energy-saving buildings.
Vigorously develop green building green building is not only a form of building, but also a direction.
The whole construction process covers the production of building materials, construction and operation after completion.
Promote green and low-carbon transformation of existing buildings.
With the topic of “carbon peak” and “carbon neutralization” becoming the focus and hot spot of the society, the implementation of the double carbon target and the realization of high-quality development have become a “must answer” for the high-quality development of the construction industry.
