In the past decade, the work of building energy conservation has been steadily advanced.
With regard to the energy conservation of new residential buildings and public buildings, the government has achieved more effective management through measures such as carrying out special energy conservation work and special energy conservation acceptance.
According to statistics, building energy consumption accounts for about 1/3 of the total social energy consumption.
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Most activities in the tertiary industry are carried out in public buildings.
With the adjustment of industrial structure, the development of the tertiary industry, and the improvement of the quality of life of residents, the use intensity of public buildings such as offices, shopping malls, and hospitals will continue to increase; At the same time, in public buildings, there are dense personnel, concentrated production and living activities, and increasing requirements for equipment and space.
Promoting Green Building Awareness Green buildings refer to high-quality buildings that conserve resources, protect the environment, reduce pollution, provide healthy, applicable, and efficient use space for people, and maximize the harmonious coexistence of human and nature throughout the entire life of the building.
At the National Leading Group Meeting on Climate Change and Energy Conservation and Emission Reduction held in July 2019, Premier Li Keqiang once again emphasized the need to focus on key areas, including promoting building energy conservation renovation in combination with the renovation of old urban residential areas.
The concept of green development has penetrated into all aspects of the entire construction process.” Xu Wei, the professional chief engineer of China Academy of Building Sciences Co., Ltd., told this newspaper.
With the improvement of the awareness of energy conservation and environmental protection in the whole society, enterprises have begun to actively apply advanced ecological and environmental protection technologies in the construction field.
Reducing this part of energy consumption will significantly improve the overall social energy consumption situation.
Among various types of buildings, public buildings account for the largest proportion of energy consumption, and this proportion will increase in the future.
Currently, the country has initially established a building energy efficiency design standard system targeting 65% energy efficiency, and some regions implement a higher 75% energy efficiency standard.
At the same time, the proportion of building energy consumption in total energy consumption has also increased day by day, from 10% in the late 1970s to about 30% now.
Nowadays, the development of energy-saving buildings has become a long-term strategy of the country, and is helping China to achieve the goals of reaching the peak of carbon emissions and high-quality development of the construction industry as soon as possible.
With the rapid development of the economy, the construction industry has also entered its heyday.
Wei Zheng analyzed that in recent years, the energy-saving work of new residential buildings and new public buildings in China has been very effective, mainly because the government can achieve effective management through technical and administrative means such as energy-saving design standards, energy-saving review, and energy-saving special acceptance.
Behind various buildings such as high-rise buildings, terraces, and courtyards that seem to stand quietly, there is a significant “movement”: every building consumes energy every moment, emitting substances harmful to the environment.
“The 13th Five Year Plan for the Development of the Construction Industry” clearly states that by 2020, all new civil buildings in cities and towns will meet the requirements of energy conservation standards, and the energy efficiency level will be increased by 20% compared to 2015.
At the same time, it has a very significant effect on energy conservation, emission reduction, and environmental protection.
A large number of energy-saving demonstration projects have sprung up everywhere, such as the Shanghai center Building.
For existing residential buildings, the government invests in renovation, and residents generally do not need to pay for their own housing, which has been comprehensively energy-saving renovation.
For example, in some areas of the north, old-fashioned high energy consuming residential buildings consume tens of millions of tons of standard coal and emit more than 500000 tons of carbon dioxide annually due to heating; In summer, the peak energy consumption of air conditioning is also very surprising.
“China mainly guides and restricts the energy conservation issues of large-scale public buildings through the energy-saving design standards for new buildings.
Energy conservation is imminent in towns or villages.
Energy efficiency in public buildings needs to break through the global scale, with newly built buildings accounting for only 2% of the inventory, basically existing buildings.
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The applied energy-saving and environmental protection technologies involve lighting, heating, cooling, power generation and renewable energy fields, which can reduce the carbon emissions of the building by 25000 tons every year; Photovoltaic power generation equipment is installed on the glass curtain wall of the Pearl River City Building in Guangzhou to generate power by sunshine; The Chengdu Raffles Plaza, with a construction area of over 300000 square meters, has a low radiation hollow energy-saving glass installed on its exterior wall, which can reduce building energy consumption by up to 70%.
After 15 years of unremitting efforts, this work has achieved remarkable results, especially in the past 10 years, with significant changes.
By the end of 2000, the increase in building energy consumption had reached a “contribution rate” of 25% to the national greenhouse gas emissions.
In the face of such huge building energy consumption, energy conservation and emission reduction are imminent.
Over the past 20 to 30 years, China has vigorously promoted energy-saving buildings, continuously improving building energy efficiency through measures such as raising energy-saving standards, implementing renovation projects, increasing regulatory efforts, and promoting renewable energy.
In the 1980s, China started the pace of building energy conservation and consumption reduction, when the “Energy Efficiency Design Standard for Civil Buildings” was issued, requiring new residential buildings to save 30% energy based on the local general design energy consumption level in 1980.
The construction industry is becoming a major force in addressing climate change and reducing carbon emissions.
The COVID-19 has caused more attention to the health and hygiene problems of public buildings, and the consequent upgrading of building equipment and electromechanical systems may further increase energy demand, thereby driving up the energy consumption of related buildings.
According to statistics, in the past few years, China has added more than 2 billion square meters of new building area each year.
Wei Zheng from the Environmental Energy Institute of the Chinese Academy of Building Sciences analyzed to our reporter that in the national economy, the contribution of the tertiary industry is increasingly increasing.
High energy consuming buildings consume a large amount of resources, such as steel, cement, wood, glass, and plastic products, and also generate carbon emissions.
According to the “Action Plan for the Creation of Green Buildings” recently released by the Ministry of Housing and Urban-Rural Development, the National Development and Reform Commission and other seven departments, by 2022, the proportion of green building area in new urban buildings will reach 70%.