Application of photovoltaic curtain wall in building engineering
Building curtain wall is the medium of building and external environment partition and contact, is an important part of building and external energy exchange and transmission.
At present, the industry is gradually focusing on the field of photovoltaic curtain wall. Especially in some large and medium-sized cities, high-rise buildings stand in abundance, and a large number of building exterior walls provide opportunities for the integrated application of photovoltaic buildings. Therefore, the design of high quality photovoltaic curtain wall has become one of the important guarantees for building engineering to respond to the concept of energy conservation.
Photovoltaic building integration
Photovoltaic building Integration (BIPV) refers to the integration of solar photovoltaic technology with building engineering technology. It can not only be used as a building envelope, but also can convert solar energy into electricity, which can be used by the building, and the surplus electricity can be sent to the city grid.
The advantages of photovoltaic building integration are:
01
Clean Green
Different from traditional fossil energy, solar energy utilization can achieve no pollution, zero emissions, is a real sense of environmental friendly energy.
02
Economize land use
With the acceleration of urbanization, land resources are increasingly scarce, and the combination of photovoltaic system and buildings can maximize the utilization of land resources, which is especially suitable for promotion in large and medium-sized cities.
03
Load the peaks and fill the valleys
In hot summer, urban heat island effect is serious. If photovoltaic technology is introduced into urban building system, it can not only alleviate urban heat island effect, but also supply urban power grid.
04
Novel shape
Photovoltaic building integration can provide a new skin art effect for architectural engineering design, and enrich the appearance of urban buildings.
Application feasibility evaluation of photovoltaic curtain wall in building engineering
01Meet the requirements of architectural aesthetics
In the traditional photovoltaic curtain wall, we usually bury the photovoltaic modules in the glass curtain wall structure, which not only ensures the appearance of the curtain wall is not affected, but also protects the normal operation of the photovoltaic modules to avoid being affected by the external environment (wind load, rain, etc.).
With the continuous development of photovoltaic industry technology, we can choose different types of photovoltaic modules in the design of photovoltaic curtain wall, and then arrange them orienteously through selective design. When the sunlight shines into the photovoltaic curtain wall, different light and shadow artistic effects are formed, which not only realizes the energy saving of the building, but also maintains the structural appearance novelty, and meets people's requirements for architectural aesthetics.
02Meet the requirements of building lighting
In curtain wall structure design, the lighting requirements of buildings can not be ignored. With the continuous development of photovoltaic technology, photovoltaic module transmittance has made a major breakthrough. It is no longer a problem for photovoltaic curtain wall system to meet the lighting requirements. Photovoltaic curtain wall can realize the accurate control of sunlight intensity into the room while meeting the effective lighting.
03Meet the requirements of building safety performance
As the outermost structure of architectural engineering, photovoltaic curtain wall not only shows the architectural aesthetic effect, but also plays an important role in protecting the safety of buildings.
Photovoltaic curtain wall is an integrated product of photovoltaic module and glass curtain wall. In order to ensure the normal operation of photoelectric conversion, its own strength requirements have been very high.
But considering the characteristics of the building project itself, the selection of photovoltaic curtain wall should also be combined with the site selection of the building project, building height, photovoltaic curtain wall installation technology and other specific factors, and can be determined after accurate calculation.
04Meet the requirements of convenient installation
Photovoltaic curtain wall is a combination of photovoltaic module and traditional building curtain wall, its installation process can refer to the traditional curtain wall. For 40 years the traditional curtain wall has been used for nearly 40 years, numerous small and medium-sized curtain wall structures have appeared in our country. The installation technology of curtain wall is mature, and can satisfy the requirement of convenience of installation.
05Meet the requirements of long service life
The photovoltaic curtain wall is constructed in a similar way to the traditional curtain wall. From the perspective of structure, its service life can be effectively guaranteed. The only thing that needs to be considered is the service life of its photovoltaic modules.
With the rapid development of global photovoltaic technology, the performance attenuation during the use of photovoltaic modules has been well controlled. New materials and new technologies continue to come out, and the life of photovoltaic modules continues to be extended.
06Meet the requirements of energy conservation and environmental protection
The core link of photovoltaic curtain wall power generation is solar photovoltaic conversion, no dust, no waste gas and other pollution, and no noise in the power generation process, at the same time, the application of new materials and new technology can absorb the reflected light caused by sunlight on the glass surface, alleviate the phenomenon of light pollution.
The outer surface of the building can be rationally used to save land resources, and the electricity generated by the photovoltaic conversion of solar energy can be supplied to the urban power grid to meet the requirements of energy conservation and environmental protection while ensuring self-sufficiency.
