Based on the annual power generation utilization hours of 1000h, the annual power generation can reach 40 billion kW · h.
Jianke Environmental Energy Technology Co., Ltd.) 0 Introduction: Tackling climate change and reducing greenhouse gas emissions are common challenges faced by all countries in the world.
Building energy conservation and emission reduction is an important aspect of achieving the “double carbon” goal.
In addition, after photovoltaic modules are installed on the exterior wall of the building, the thermal performance of the enclosure will also change, which will affect the cooling and heating load of the building.
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In addition, the matching of building capacity and energy consumption is also one of the research hotspots of building photovoltaic applications, and accurate power generation performance prediction is the basis for achieving the matching of capacity and energy consumption.
Due to the obvious heating of PV modules while generating electricity, it is easy to be limited by the installation conditions when installing on the exterior wall of the building.
In view of the problems that the heating of building photovoltaic modules affects the heat transfer and energy conservation performance of the enclosure, and the photovoltaic system power generation performance is affected by multiple factors, the research on the coupling mechanism of building exterior photovoltaic module power generation and heat transfer, the analysis of the impact of solar incidence angle and other factors on the photovoltaic power generation performance, and the collaborative analysis of solar energy and building energy consumption are carried out, and the installation mode of exterior photovoltaic modules with the best comprehensive energy conservation performance is proposed, The optimization design software of building solar energy supply system has been developed and applied in the photoelectric demonstration building of the Chinese Academy of Building Sciences to practice the zero-carbon building path of building photovoltaic deep integration.
Key words: photoelectric building; Building photovoltaic integration; PV module; Installation method; Optimize the design software; Net zero carbon emission; Capacity building; The author of zero-carbon architecture, Bian Mengmeng, 2 Li Bojia, 2 Zhang Xinyu, 1 Huang Zhulian, 3 Wang Conghui, 2 Wang Min, 3 He Tao, 1 Xu Wei, 2 Wang Boyuan, 2 (1.
Solar energy has the advantages of green, energy saving and zero emission.
National Key Laboratory of Building Safety and Environment; 2.
1.1 Research on the installation method of PV modules with the best comprehensive energy-saving performance on the exterior wall At present, PV modules are mostly installed on the roof of buildings, but for urban buildings in China, the area of PV modules installed on the exterior wall is larger than that on the roof, and the energy-saving potential cannot be ignored.
China Academy of Building Sciences; 3.
While the performance requirements for building envelope and electromechanical equipment are further improved, better use of renewable energy such as solar energy to meet building energy demand has also become a key way to further develop and improve building energy efficiency.
In view of the above problems, this paper proposes the installation method of PV modules for exterior walls with the best comprehensive energy-saving performance and develops the optimization design software of building solar energy supply system through the research on the coupling mechanism of power generation and heat transfer of PV modules for exterior walls, the analysis of the impact of solar incidence angle and other factors on the photovoltaic power generation performance, and the collaborative analysis of solar energy and building energy consumption, The original air-conditioning building of the China Academy of Building Sciences Co., Ltd.
In the design and operation, there are also problems such as building photovoltaic module heating affecting the heat transfer and energy saving performance of the enclosure, and photovoltaic system power generation performance being affected by multiple factors.
Poor heat dissipation leads to high operating temperature, which affects the power generation of PV modules.
1 Photovoltaic building technology research At present, the technology of PV system in modules, confluence, inverter, grid connection and other links is relatively mature, but in the process of building application, it is also necessary to fully consider the two-way impact of PV system installed on the building surface on the building cooling and heating load and building thermal insulation on the power generation efficiency of PV modules, and optimize the layout of PV modules.
According to the statistics of China Photovoltaic Industry Association Photovoltaic Building Professional Committee, by the end of 2021, China’s cumulative installed capacity of building photovoltaic system is about 40GW.
It is an important energy saving and emission reduction method in the fields of building energy consumption, rural agricultural energy consumption and so on.
Therefore, this paper studies the installation mode of photovoltaic modules on the exterior wall of the building and the accurate calculation of the building photovoltaic system power generation, so as to establish the basis for the accurate design and optimization of photovoltaic buildings.
The monitoring data shows that the annual power generation can reach 212382kW · h, and the power generation per unit building area is 73.79kW · h/m2.
China has taken the initiative to, The goals of carbon peak by 2030 and carbon neutralization by 2060 are proposed.
The full text mandatory specification GB55015-2021 “General Code for Building Energy Conservation and Renewable Energy Utilization” will be implemented from April 1, 2022.
The total installed power of the photovoltaic system of the demonstration building is 236.1kW.
With the rapid decline in costs, the building photovoltaic technology has been rapidly developed, becoming an important technical path to achieve the “double carbon” goal in the construction field.
It can meet the total energy demand of the building and supply power to other buildings in the courtyard, realizing net zero carbon emissions.
was transformed into a photovoltaic demonstration building (hereinafter referred to as the demonstration building), and a comprehensive experiment of photovoltaic integration technology for multiple types of buildings was carried out to practice the zero-carbon building path of building photovoltaic deep integration, providing technical reference for the development of photovoltaic buildings in China.
However, the current building photovoltaic system is mainly based on industrial and commercial rooftop additional photovoltaic system, focusing on power generation performance and light building performance.
In October 2021, the State Council issued the “Action Plan for Carbon Peak before 2030”, which listed the “Urban and Rural Construction Carbon Peak Action” as one of the “Ten Actions for Carbon Peak”, and proposed to accelerate the optimization of building energy consumption structure, deepen the application of renewable energy buildings, and promote the integrated application of photovoltaic power generation and building.
The carbon emissions from construction operations account for 21% of China’s total carbon emissions.
In 2021, the newly installed power of China’s photovoltaic power generation will be 54.88GW, accounting for 32% of the world’s total.
