At present, the three traditional energy sources of oil, coal and natural gas are depleted worldwide, and humans will have to turn to higher-cost bioenergy, water, geothermal, wind, solar and nuclear energy, and China's energy problem is even more serious. There are four major problems in China's energy development: 1 per capita energy possession and low reserves; 2 energy structure is still dominated by coal, accounting for about 75%. The annual coal consumption in the country has exceeded 1.3 billion tons; 3 the uneven distribution of energy resources is mainly reflected in the energy shortage in the economically developed areas and the lack of rural commercial energy supply, resulting in the North Coal South Transportation, the West-East Gas Transmission, and the West-East Power Transmission; 4 Energy use efficiency is low, energy terminal utilization efficiency is only 33%, 10% lower than developed countries. With the rapid development of urban construction, China's building energy consumption has increased significantly year by year, reaching 32% of the total social energy consumption, plus annual energy consumption of building construction materials is about 13%, and the total energy consumption of buildings has reached the national level. 45% of total energy consumption.
China's existing building area is 40 billion m2, most of which are high-energy buildings, and nearly 2 billion m2 of new buildings are built each year, of which more than 95% are still high-energy buildings. If China continues to implement design standards with low energy conservation levels, it will leave a heavy energy burden and management difficulties. The huge building energy consumption has become a huge burden on the national economy. Therefore, comprehensive energy conservation in the construction industry is imperative. Comprehensive building energy conservation is conducive to fundamentally promoting energy resource conservation and rational use, alleviating the contradiction between China's energy resource supply and economic and social development; facilitating the development of circular economy and achieving sustainable economic and social development; and conducive to long-term protection of the country Energy security, environmental protection, improvement of people's quality of life, and implementation of the scientific development concept.
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