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The geopolitical issues caused by the shortage of petroleum and other petrochemical energy sources are becoming more and more serious. Energy supply security is playing an increasingly important strategic role in national rejuvenation and sustainable development. The world's energy map is changing today and in the foreseeable future. changes, new energy will play a greater role. Some experts have suggested that China and even the world will usher in a solar energy era after the oil era.
At present, giving priority to passive design as an ecologically driven design strategy has gradually become the conceptual consensus of contemporary architectural designers, and structural energy conservation will become the basic method of building energy conservation design. The extensive use of modern building materials and construction technologies has allowed China's five thousand years of traditional architectural concepts and construction methods to be inherited and improved.
Solar buildings have the characteristics of increasing revenue and reducing expenditure. They integrate new technologies such as solar photovoltaic power generation, solar heating/hot water, solar refrigeration and air conditioning, solar ventilation and cooling, and controllable natural lighting. They can be combined with shallow ground energy, wind energy, and biomass energy. It is a suitable construction technology with high scientific and technological content, low resource consumption and small environmental load. Therefore, solar buildings will become one of the main concepts of construction in our country. The solar building concept generates industrial development opportunities.
Architecture carries many civilizations such as politics, economy, culture, and education, has strong social functions, and has become an important pillar industry in promoting my country's economic development. At the same time, the rapid development of the construction industry has brought about a continuous increase in the energy consumption of building production and building use, and has posed challenges to the sustainable development of the human settlement environment and the affordability of non-renewable energy.
Fortunately, the Chinese government’s commitment to international obligations on emission reduction and the implementation of the Scientific Outlook on Development, as well as the continuously strengthening national awareness of building energy conservation and the increasingly mature real estate market environment, have promoted the complete interest chain and marketization of building energy conservation. The formation of the operating mechanism provides good opportunities for buildings to utilize solar energy. It is certain that the future construction market will be a market for energy conservation and emission reduction, and solar buildings are ushering in the spring of rapid development.
At present, provinces such as Jiangsu, Shandong, Hebei, Hainan, and Yunnan, and cities such as Beijing, Shanghai, Shenzhen, and Dalian have begun to enforce it in new residential buildings below the first floor and in public buildings such as office buildings, schools, hospitals, and hotels. Solar hot water system, therefore, the application of solar hot water system can become a mandatory requirement for building energy saving at the national level, so that the building energy saving goal of %% or %% contains more connotations. It is conceivable that when mandatory requirements become standard specifications, solar collectors will become common building components like outdoor units of building air conditioners in the past.
In addition, the state advocates the introduction of a building energy consumption measurement platform into the building operation system, which not only provides the basis and means for building energy-saving audits and operation monitoring, but also provides an environment for awareness cultivation of solar and other renewable energy building applications. China’s road to solar building development.
Develop building energy collection systems to achieve building energy self-service. The building itself as a key component of the energy system is a distinctive feature of solar buildings. The building's passive energy collection index can be used to characterize the building's passive energy supply capacity and the thermal comfort of the building environment, while the building's active energy supply index can be used to reflect the contribution rate of renewable energy to building energy consumption and emission reduction.
Take into account building operating costs and their external costs. Building operations are reflected in various activities throughout the life cycle of buildings, including planning, construction, use, renovation, and demolition. Building energy-saving technology, solar energy technology, and ecological building technology have an important impact on building operations. Therefore, people should not only pay attention to the initial investment in the building, but also pay attention to the later operations and expenses of the building. It should not only meet the residential needs of the Chinese people, but also pay attention to the energy consumption of housing. In addition, the increase in external environmental costs such as carbon dioxide emissions should also be considered.
Introduce building integration design methods and develop solar energy and building integration technology. Architectural integrated design refers to incorporating solar energy application technology into the whole process of architectural design to achieve the requirements of beautiful, practical and economical architectural design. The use of modular solar building components (such as movable shading components, wall-type air collectors between windows, balcony-type solar collectors, horizontal shading components and ventilation windows, etc.) can not only make full use of active and passive solar technology, These components constitute the facade elements of a modern residence.
Upgrade traditional architectural concepts and implement the passive-first design principle. Solar buildings must first be energy-saving buildings. Under the design principle of passive priority, attention should be paid to the combination of passive and active solar energy utilization technologies.
Make full use of building resources and ask for energy from buildings. The minimum limit of 100 million acres of cultivated land, 100 million square meters of existing buildings, and 100 million square meters of annual new buildings to meet the needs of the Chinese people have become external pressures and realistic conditions for making full use of construction resources. Therefore, making full use of building resources and asking for energy from buildings is not a slogan, but a social responsibility.
Pay attention to climate characteristics and on-duty environmental energy technology. The duty environment refers to the environment when the building is not in use. The building duty environment directly affects the start-up time to reach the building usage environment, the indoor air quality of the building and the service life of the idle building. Designers should pay attention to related building maintenance design technologies and safe on-duty environment energy-using technologies, and energy technology companies should also pay attention to its huge market space.
Make full use of advanced and mature technologies such as solar water heating. Solar water heaters are currently the most mature technology among solar energy utilization technologies, with a high application penetration rate. By the end of the year, the global installation volume of solar water heaters will be approximately . At present, the research and development of solar thermal collection systems integrated with buildings has made great progress. However, it should also be noted that the use of solar hot water for residential buildings above the storey has become a gap in many of the above policies. It should be emphasized that the safe maintenance and reliable operation of solar water heating systems, especially heat collection systems, are still the key to integrated solar water heating design.
Introduce the concept of energy Internet to improve the economic and security performance of renewable energy systems. The concept of Energy Internet at least includes the following aspects: A variety of renewable energy sources can complement each other in time and space, improving the stability, economy and system efficiency of renewable energy systems. Energy systems of different scales can be interconnected, and centralized energy systems (such as central heating systems) can be interconnected. Water/heating system, national grid system, etc.) can become a backup system for distributed energy systems (such as home energy centers), improving system security and economical investment. Centralized energy systems serve as energy storage systems for distributed energy systems, and distributed energy systems The system can also provide peak-shaving functions for centralized energy systems, thereby maximizing the use of renewable energy and improving the overall investment benefits of the system.
Choose appropriate solar building technology. We should adapt measures to local conditions based on regional climate characteristics and residents' lifestyles, focusing on reducing total energy consumption. For example, for northern cities, heating energy consumption should be reduced as much as possible, the insulation performance of the building envelope and heat source efficiency should be improved, and terminal heating adjustment technology and facilities should be improved. For the Yangtze River Basin, it is appropriate to develop a variety of heat pump technologies and advocate the use of air-conditioning for heating in time-divided and space-divided spaces. Technology, especially the need to strengthen natural ventilation design. For buildings in southern my country, natural ventilation and external shading design technology should be actively applied, and centralized cooling technology should not be used.
my country's large public buildings account for less than %% of the total urban building area, but building energy consumption accounts for more than %% of the total energy consumption of urban buildings in my country. It is of great significance to research and promote low-energy consumption and energy-saving design technology for large public buildings. For example, the exterior windows of large public buildings should be designed to be openable to reduce reliance on mechanical ventilation by adjusting natural ventilation.
In short, energy conservation and emission reduction are a national strategy that our country must adhere to in the long term, and increasing revenue and reducing expenditure is the only way for our country to promote building energy conservation. Solar buildings will play an important role in building a resource-saving society and become a strategic approach to building energy conservation.