Overview of the development of the hottest dual gl

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Overview of the development of dual glass photovoltaic building integration

with the transformation of photovoltaic power generation field, the research and development of BIPV system in China has made great progress, which determines the different sensors used. During the Ninth Five Year Plan period, 170KW and 7KW photovoltaic power generation roofs were successfully built in Shenzhen and Beijing, respectively, and power generation was realized. During the "Tenth Five Year Plan" and "Eleventh Five Year Plan", Beijing, Shanghai, Shenzhen and other places have successively built a number of BIPV projects, such as Beijing South Railway Station, Beijing Capital Museum, Shenzhen International Park Expo Park, Shanghai Chongming County solar photovoltaic power station, Qingdao railway station, Guangzhou Phoenix high-end villa, Hainan Sanya Ruiya international apartment

at present, the installed capacity of the BIPV system that has been built in Hong Kong is close to 2MW, which is located in the campus of the Hong Kong Polytechnic University, the government demonstration building, the Penny's Bay Fire Station and the police station, the electrical and Mechanical Services Department, St. Paul's primary school, Ma Wan Chai primary school and the environmental protection building in Tsim Sha Tsui business district

in order to promote the application of renewable energy in buildings, the Ministry of Finance and the Ministry of construction jointly issued the implementation opinions on promoting the application of renewable energy in buildings and the evaluation methods for renewable energy building application demonstration projects. At the same time, the green building evaluation standard (gb/t50378 -2006) implemented on June 1, 2006 also clearly takes renewable energy power generation as the preferred item of green building evaluation. On March 23, 2009, the Ministry of finance, together with the Ministry of housing and urban rural development, issued the implementation opinions on accelerating the application of solar photovoltaic buildings (CJ [2009] No. 128) and the Interim Measures for the administration of financial subsidies for the application of solar photovoltaic buildings (CJ [2009] No. 129). The Ministry of Finance issued a subsidy standard of 20 yuan/wp for eligible solar photovoltaic buildings in 2009, There is also a notice on printing and distributing the application guidelines for solar photovoltaic building application demonstration projects (CBJ [2009] No. 34). On July 16, 2009, the Ministry of finance, the Ministry of science and technology, and the National Energy Administration jointly issued the notice on the implementation of the golden sun demonstration project. The notice clearly stipulates that in principle, 50% of the total investment in photovoltaic power generation systems and their supporting transmission and distribution projects will be supplemented for photovoltaic power generation projects; Among them, 70% of the total investment of the independent photovoltaic power generation system in remote areas without electricity will be subsidized; For the industrialization of key technologies of photovoltaic power generation and basic capacity-building projects, support is mainly provided through interest discounts and subsidies. Through financial subsidies, scientific and technological support and market pull, it is planned to adopt financial subsidies to support photovoltaic power generation demonstration projects of no less than 500 MW during the year

the prospect of solar photovoltaic industry is very broad. China plans to achieve a total solar power generation capacity of 300 MW by 2010, including 1000 rooftop photovoltaic power generation projects with a total capacity of 50 MW and large-scale photovoltaic power stations with a total capacity of 20 MW; By 2020, it will reach 30000 MW, including 20000 roof photovoltaic power generation projects with a total capacity of 1000 MW and 200 MW solar photovoltaic power stations

building integrated photovoltaic (BIPV) is a new concept of applying solar power generation. In short, the filling process should be shortened as much as possible, that is, the solar photovoltaic power generation array should be installed on the outer surface of the maintenance structure of the building to provide power. Because the combination of photovoltaic array and building does not occupy additional ground space, it is the best installation method for photovoltaic power generation system to be widely used in cities, so it has attracted much attention

the combination forms of photovoltaic and architecture generally include the following: first, the combination of photovoltaic and wall; Second, the combination of photovoltaic and roof; Third, the combination of photovoltaic and sunshade; Fourth, the combination of photovoltaic and fence. From the perspective of the combination of photovoltaic array with building wall and roof, it is mainly roof photovoltaic power station and wall photovoltaic power station. In terms of the integration of photovoltaic modules and buildings, there are mainly photoelectric curtain walls, photoelectric daylighting roofs, photoelectric sunshades and other forms. At present, there are mainly eight forms of photovoltaic building integration:

a composite layer composed of two pieces of glass and solar cells. The photovoltaic cell module formed by the series and parallel collection of wires between the cells to the lead end is called double glass photovoltaic module. The double glass photovoltaic module is composed of the following parts: ① two pieces of glass: it must be tempered safety glass, and the light facing side must be ultra white glass; ② Cell: monocrystalline silicon, polycrystalline silicon and amorphous silicon; ③ Composite layer: it can be polyvinyl butyral resin (PVB) composite layer or ethylene vinyl acetate copolymer film (EVA) composite layer

mechanical properties of photovoltaic modules: as ordinary photovoltaic modules, as long as they pass the detection of IEC61215, they can meet the requirements of resisting 130km/h (2400pa) wind pressure and 23m/s hail with a diameter of 25mm. Photovoltaic modules used as curtain wall panels and daylighting roof panels need to meet not only the performance requirements of photovoltaic modules, but also the three property test requirements of curtain walls and building safety performance requirements. Therefore, they need to have higher mechanical properties and adopt different structural methods. For example, the size is 1200mm × 530mm ordinary photovoltaic modules generally use 3. 2mm thick tempered ultra white glass with aluminum alloy frame can meet the use requirements. However, when components of the same size are used in BIPV buildings, the requirements for the mechanical properties of its glass may be completely different in different locations, different floor heights, and different installation methods

aesthetic requirements of Architecture: BIPV architecture is first of all an architecture. It is an architect's art, which is equivalent to the music of musicians and a famous painting of painters. For buildings, light is their soul, so buildings have high requirements for light and shadow. However, most of the glass used in ordinary photovoltaic modules is cloth grain ultra white tempered glass, which has the effect of frosted glass to block the line of sight. If BIPV modules are installed in the sightseeing area of the building, this location needs light penetration. At this time, smooth ultra white tempered glass should be used to make double-sided glass modules to meet the functions of the building. At the same time, in order to save costs, the glass on the back of the battery board can adopt ordinary smooth tempered glass

the adhesive used for the packaging of ordinary photovoltaic modules is generally EVA. Because of its weak anti-aging performance and service life of less than 50 years, EVA cannot have the same service life as the building. EVA yellowing will affect the beauty of the building and the power generation of the system, so designers should try to avoid using EVA encapsulated components when choosing BIPV components

the technical code for glass curtain wall engineering approved by the Ministry of construction of China in 1997 stipulates that the production of laminated safety glass should be processed by PVB dry process. PVB film has good adhesion to inorganic glass, and has the characteristics of high light transmittance, UV resistance and high mechanical strength. The upcoming "technical code for the application of solar photovoltaic systems in civil buildings" also clearly stipulates that the use of double glass photovoltaic building components, its adhesive layer should be PVB

ordinary photovoltaic modules packaged with EVA are mainly used for the purpose of pure power generation. Because their safety performance can not meet the requirements of the building code, they are not suitable to be used in places that require building safety performance. With excellent building performance and power generation capacity, PVB encapsulated double glass photovoltaic modules will be widely used with the expansion of the solar photovoltaic market

the international companies that produce double glass photovoltaic modules are mainly ertexsolar in Austria and solarwatt in Germany. These two companies are at the forefront of the industry in promoting double glass photovoltaic modules, so that the characteristics and performance of this product have been recognized in the world

in China, Wuxi Suntech, Jiangsu Linyang, Guangdong Jingang and other companies double-click the consequence display column if there is no curve coordinate in the double glass light V components are currently in a relatively leading position

Suntech Wuxi: one of the largest solar module providers in the world, listed on the New York Stock Exchange in 2005. Suntech can provide the most complete range of photovoltaic modules in the industry, such as see thru, light thru, semi shade, just roof and other products. Suntech's core product is its famous standard photovoltaic module. The basic structure is made of glass. October is the first time in the second half of the year to import growth shell and TPT base plate materials. New fixing points need to be added to the building structure to fix the components, such as adding brackets on the roof. Suntech's standard photovoltaic modules have been widely used worldwide, such as the San Francisco International Airport in the United States, the greater Murcia municipal project in Spain, etc. Suntech's see thru, light thru, semi shade and just roof products are all integrated building products. See thru module adopts amorphous silicon thin film photovoltaic technology, which can achieve 1%, 5% or 10% light transmittance. This module is suitable for curtain walls, skylights, ceilings, porches and other vertical or inclined polished surfaces; The light thru module adds monocrystalline silicon or polycrystalline silicon solar cells between the two glasses, which are encapsulated by EVA or PVB, and are sandwiched between two low iron tempered glasses or between the glass (front) and Tedlar? (backplane) can be used for ceiling, porch, skylight and vertical curtain wall

Lin Yang new energy: Solarfun was successfully listed on NASDAQ in 2006. Through its sister company Shanghai Linyang solar, Solarfun provides system integration services in China and is one of the leading enterprises in China's solar energy industry. Linyang new energy mainly produces standard photovoltaic modules packaged with EVA, which are used in its parallel power generation and independent power generation projects. In recent years, it is also gradually promoting its double glass BIPV products, such as the pavilion of the landscape corridor of the China Millennium Monument, the landscape lamppost sun in the central area of the Olympic Games, etc. The maximum size of its double glass assembly is 3. 5m*2m, the thickest thickness can reach 25mm, and the maximum power is 300wpv

Guangdong Jingang glass: a newly emerging new power in China's new energy field, and a leading pilot unit of innovative enterprises in Guangdong Province. Diamond glass takes full advantage of its rich experience in glass deep processing, and realizes the perfect combination of energy conservation and building safety of its BIPV products. In 2006, the "key technology for the industrialization of solar photovoltaic building integrated materials" of the energy-saving scientific research project jointly developed by diamond glass and Sun Yat sen University and other scientific research institutions was identified as a key breakthrough project in key areas in Guangdong and Hong Kong; In 2008, Vajra glass's core BIPV product, PVB encapsulated double glass photovoltaic building modules, obtained the product certification certificate issued by TUV Rheinland, which also marks that the company's double glass photovoltaic building modules have reached the domestic leading level. At present, the largest photovoltaic building integration (BIPV) project in Northeast China, Shenyang Henglong real estate Middle Street Plaza, won the bid of King Kong glass, has entered the formal construction stage, and the system power of the project is as high as 150KW

the market demand potential of double glass photovoltaic modules can be reflected in the following aspects: first, China has a large-scale building using double glass photovoltaic modules. China has a building area of about 40 billion m2, with a roof area of 4 billion m2. With the south facade, the usable area is about 5 billion m2. If 20% is used to install solar cells, 100gw can be installed. There are 200million M2 roofs in Shanghai alone. Assuming that 1/10 of the roofs are used for photovoltaic and power generation, 3.4 ~ 4.7 billion kwh of electricity can be obtained every year. Secondly, the double glass photovoltaic module conforms to the future architectural concept. One of the biggest characteristics of modern buildings is the intellectualization of buildings, and the future intelligent buildings must be equipped with BIPV system, which is also an important supplement to the content of intelligent buildings

now, a good demonstration project is double glass light

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