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2022-08-22
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Market analysis: the application and market of photovoltaic glass in China

solar photovoltaic glass is an important emerging supporting product in the solar cell industry, which gradually grows with the development of the photovoltaic industry. At present, some large domestic enterprises have begun to intervene in the field of solar cell glass production, and the production capacity of a single production line is 250-500 tons per day. It is understood that the demand for glass in China's photovoltaic field is increasing at a rate of 50% per year, and has exceeded 25million square meters in 2010. The market prospect of solar cell glass is very broad. From the perspective of development trend, China will become an important production base of solar cell glass in the future

the production of solar glass in China started late. At present, there are more than 10 domestic production lines capable of producing low iron (ultra white) glass (including calendered ultra white glass), distributed in Shandong, Jiangsu, Shanghai, Zhejiang, Guangdong, Henan and other regions, with more than 20 production lines, and the actual production capacity is about 3000 tons per day. Among them, most of the products from Shandong, Jiangsu, Shanghai, Zhejiang, Guangdong and other places are exported to the Netherlands, Germany, Japan, South Korea, Thailand and Taiwan, and the market in which the original films are basically sold directly to other glass processors in China is gradually rising

in terms of the current international market, only a few enterprises in the world, such as PPG in the United States, Saint Gobain in France, Pilkington in the United Kingdom, Asahi in Japan, glaverbel in Belgium, can produce low iron ultra white solar glass with excellent quality, but the output cannot meet the growing market demand in the world

classification and application of solar photovoltaic glass

classification of photovoltaic glass. Photovoltaic glass substrates for solar cells generally include ultra-thin glass, surface coated glass, low iron content (ultra white) glass and other types. According to the nature of use and manufacturing methods, photovoltaic glass can be divided into three products, namely, the flat plate type can reduce (increase) the temperature of the experimental container outside the tank, and the cover plate of the solar cell is generally calendered glass; Thin film battery conductive substrates made of semiconductor materials with a thickness of only a few microns are plated on the surface of flat glass; The lens or reflector glass used in the collector photovoltaic system. The characteristics and functions of these three products are completely different, and their added value is also very different

nowadays, the most widely used solar photovoltaic glass is high transmittance glass, which is low iron content glass, which is commonly known as ultra white glass. Iron is an impurity in ordinary glass (except heat absorbing glass). The existence of iron impurities, on the one hand, coloring the glass, on the other hand, increases the heat absorption rate of the glass, which also reduces the light transmittance of the glass

iron in glass is introduced by raw materials, refractory materials or metal production equipment, which cannot be completely avoided. People can only reduce the content of iron in glass as much as possible through production control. At present, the iron content of solar cell glass is between 0.008% and 0.02%, while the iron content of ordinary float glass is more than 0.7%. Low iron content impurities can bring high solar transmittance. For the 3.2mm thick and 4mm thick glass, which is the most widely used in China, the sunlight visible light transmittance generally reaches 90%~92%

as one of the most important components of solar devices, solar photovoltaic glass, a series of products produced by the company, such as tensile testing machine, electronic universal material testing machine, hydraulic universal material testing machine, horizontal tensile machine for harness terminals, impact testing machine, vibration testing machine, requires that the glass plate must be highly transparent, so the requirements for iron content in silicon raw materials used to produce solar glass are very strict, Fe2O3 content is generally 140 ~ 150ppm

application of photovoltaic glass. It is reported that Germany was the first country in the world to use transparent flat glass as a substrate for the development and application of solar cells. German scientists and technicians installed this plate-shaped solar cell on the building as a window glass, which can directly supply the absorbed electric energy to the residents, and the excess electric energy can also be input. The development and utilization of this kind of glass for solar cell was paid attention to by the United States and Japan soon, thus accelerating the pace of the research, development and application of low-iron and ultra-thin glass for solar energy

characteristics and types of TCO coated glass

TCO glass is a kind of photovoltaic glass coated with conductive film, that is, transparent conductive oxide coated glass. It is to evenly coat a layer of transparent conductive oxide film on the surface of flat glass by physical or chemical coating. TCO glass was first used in flat panel displays, and now ITO type conductive glass is still the mainstream glass electrode product in the flat panel display industry. In recent years, the rising price of crystalline silicon has greatly promoted the development of thin-film solar cells. At present, thin-film solar cells account for more than 10% of the world's photovoltaic market. TCO glass is used as a necessary component of the front electrode of photovoltaic cells. The market demand is growing rapidly and has become a high-tech coated glass product

in solar cells, the electrodes of crystalline silicon cells are wires welded on the surface of silicon, and the front cover glass only needs to achieve high light transmittance. Thin film solar cells are coated with a semiconductor film on the conductive film on the glass surface, and then plated with a back electrode

development prospect of TCO glass for photovoltaic. When the photovoltaic industry is developing at a rate of nearly 40% for five consecutive years, there is an unprecedented shortage of polysilicon, the upstream raw material of crystalline silicon solar cells, the mainstream product. The price of polysilicon has risen from $24/kg in 2003 to the current spot price of more than $300/kg. Compared with crystalline silicon solar cells, thin-film solar cells have the characteristics of strong weak light application and strong shape plasticity. The rise in the price of crystalline silicon has virtually promoted the development of thin-film solar cells. At present, thin-film solar cells account for more than 10% of the world photovoltaic market. With the rising price of polysilicon, the development of thin-film solar cells is expected to further accelerate

due to the different conversion efficiency of thin-film batteries, we take the mainstream amorphous silicon as the calculation basis, and the nominal power of the battery per square meter is 50 watts, that is, every 50 Watt battery will use 1 square meter of TCO glass. Based on this, it can be calculated that the demand for TCO glass in the photovoltaic industry in the world in 2007 was 7million square meters. This figure seems small, but due to the high-end production technology of TCO glass, there are only two major suppliers in the world at present. With the annual growth rate of more than 50% in the solar cell industry, products have begun to fall short of demand, and the price per square meter has reached more than $20

according to the prediction of relevant authorities, thin-film solar cells will continue to maintain rapid growth. At present, many manufacturers and research institutions are in the process of industrialization of TCO glass, the output will continue to expand, and new high-performance products will continue to be introduced. Due to the rapid development of thin-film solar cells, TCO glass for photovoltaic has become very popular in the market. In the field of conductive glass, photovoltaic TCO glass has unique performance requirements, which are closely related to the output characteristics of solar cells. It can be said that the development of thin-film solar cells will depend on the improvement of photovoltaic TCO to a certain extent. The shortage of energy has promoted the development of photovoltaic industry, and will also drive the market demand of photovoltaic TCO glass products

the international solar glass machinery manufacturing market is promising. At present, with the expansion of the solar energy industry market internationally, several European embossed glass manufacturers are experiencing unprecedented demand from solar glass manufacturers

the photovoltaic industry is striving to become competitive in cost. It is predicted that the power generation cost of using photovoltaic power generation facilities will not exceed that of using conventional means in about 1-4 years. Among them, glass plays an increasingly important role

in order to realize the cost-effectiveness and competitiveness of solar power generation products, the price of solar power products must be reduced. At present, in Europe, the cost of solar power generation per watt is reduced from 3 to 4 euros to less than 1 euro. This price reduction trend also applies to the glass industry. At present, the manufacturing cost of thick film modules accounts for about 5% of the cost of glass, and the cost of thin film components accounts for 1% - 25%

if the cost of photovoltaic industry is reduced by 2/3, considering that the price of glass remains stable, this is equivalent to the factor of glass in the product cost will increase by 3 times, that is, the cost of thick film module accounts for 15%, and that of thin film module is 45% - 75%

after years of development, the application of solar thermal utilization products in China has been very popular, and a relatively complete solar photovoltaic industry chain has been formed. The domestic solar photovoltaic power generation market has also started and started well

according to statistics, the scale of solar thermal utilization industry in China has accounted for 78% of the world, and China is one of the largest producers and users of solar collectors in the world. In 2010, the number of solar water heaters in China reached about 173million square meters, ranking first in the world. At present, the scientific and technological level and product quality of China's solar thermal utilization industry are high, and the application fields have covered hot water, heating, building materials, printing and dyeing, aquaculture and other fields; The production equipment is perfect, the industrialized production mode is basically formed, and a modern enterprise system, a diversified marketing mode, and a perfect standardization system have been established

during the 12th Five Year Plan period, China will take a number of measures to promote the development of solar thermal utilization industry and the steady start of domestic photovoltaic market. First, continue to promote the use of solar water heaters. By 2015, China's solar thermal utilization area will reach 400million square meters. The second is to increase support for the research and development of solar power generation technology, build a national solar energy research and Development Experimental Center, and increase financial and enterprise research and development investment. Third, the domestic solar power market will be steadily launched, and a number of large-scale photovoltaic demonstration power stations will be built in areas with abundant solar energy resources and desert and barren land resources; Promote distributed photovoltaic power generation system combined with buildings in cities and towns; Promote photovoltaic power generation systems or build small photovoltaic power stations in remote and power-free areas. Fourth, guide the healthy development of China's solar photovoltaic power generation industry, accelerate the scientific and technological innovation and progress of photovoltaic power generation industry, and cultivate it into China's advanced equipment manufacturing and emerging energy pillar industry

market demand and technical cost of photovoltaic glass

photovoltaic glass is the auxiliary material with the largest cost proportion in solar cells, mainly including ultra white calendered glass for crystalline silicon cells and TCO glass for thin film cells. The rapid development of photovoltaic industry will drive the growth of related auxiliary material industry

the shortage of ultra white calendered glass will be alleviated. Ultra white calendered glass is the cover glass used for crystalline silicon batteries. Its iron content is much lower than that of ordinary float glass, and the sunlight transmittance can reach 90% - 92%. By tempering and plating antireflection film on the original glass, the strength and light transmittance of the glass can also be increased, and the conversion efficiency of the battery can be improved

according to the prediction of relevant parties, the global PV installed capacity will reach 22.2gw in 2011. The European market is gradually becoming market driven, and the Chinese market is about to start. The actual PV installed capacity may be much higher than expected. It is conservatively estimated that the output of solar cells in China accounts for 55% of the world, and crystalline silicon cells account for 90% of them. In 2011, the output of crystalline silicon cells in China was about 11gw

tco glass technology threshold guarantees high profit margin. TCO glass is plated on the surface of ultra white float glass by physical or chemical methods

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