High school science and technology paper with the theme of low-carbon life. Asking questions, analyzing causes, and solving measures. Low-carbon environment 4 points (specific)

From the global financial crisis to today, we are facing a new economic situation. "Humanity must survive and the earth must cool down." The "low-carbon economy" will change our production and lifestyle. Since the 1960s, FRP composite materials have participated in material transformation and innovation in various fields of the national economy as a lightweight and high-strength material. More than 50 years have passed, and facts tell us that our material has extremely strong vitality. UPR resin-based The annual output of composite materials has reached more than 4 million tons, including more than 1.9 million tons of fiberglass materials and more than 2.8 million tons of resin cast stone and coatings. It can be seen that the vast number of employees, scientific and technical personnel, and bosses on the composite materials front have worked hard and made great achievements, resulting in a brilliant period of comprehensive development for the fiberglass composite materials industry. Today, we are in a period of major changes in the energy structure. To adapt our materials and products to the global "low-carbon economy" situation, developing a new generation of materials and products will be the direction of our efforts. This time, the theme of my exchange with everyone is "Facing the global low-carbon economy, accelerating technological innovation of materials and products, and promoting the comprehensive improvement of the fiberglass composite material industry." Use this as a starting point to attract good ideas and form a first-class consciousness.

What I report to you is divided into three parts:

1. Ten-year review of my country's UPR industry and the current development status of UPR in 2009

2. Low carbon Economy and FRP emerging markets

3. my country’s wind power market and megawatt FRP blades

1. Ten-year review of my country’s UPR industry and UPR development status in 2009

my country's UPR industry experienced an extraordinary year in 2009. According to preliminary statistics from the China UPR Industry Association, the total output reached 1.53 million tons, an increase of 5.5% over the previous year. Among them, epoxy vinyl ester resin reached 33,000 tons, an increase of 11%. The total output of the country's four major private enterprises, including Yabang, Tianhe, Futian and Huaxun, reached 440,000 tons, an increase of 11% over the previous year. The total output of foreign-funded enterprises such as DSM, Ashland, Changxing, Shangwei, Huari and Showa reached 440,000 tons. 120,000 tons, an increase of 9% over the previous year. Jiangsu reached 630,000 tons, an increase of 5% over the previous year. The domestic UPR terminal composite materials industry mainly flows into three major markets: UPR-based fiberglass reinforced plastic (FRP) market, accounting for 55% of the total resin usage, UPR-based artificial stone, handicrafts, buttons and other markets, accounting for the total resin usage 35; UPR-based functional coatings account for 10% of the total resin usage. Table 2 analyzes the application areas. The FRP market is concentrated in Jiangsu, Shanghai, Shandong, Guangdong, Zhejiang, Hebei, Tianjin, and Henan. The artificial stone, handicrafts, and button markets are concentrated in Zhejiang, Guangdong, Fujian, Shandong, Shanghai, Jiangsu, and Sichuan. The functional coatings market is concentrated in Guangdong, Shanghai, Jiangsu, Zhejiang, Shandong, and Hebei. Affected by the global financial crisis in the second half of 2008, resin sales were once stagnant, but growth quickly resumed after October. The country’s four trillion investment and ten major industry adjustment and revitalization plans are of great significance to resist the impact of the financial crisis, optimize the industrial structure, and sustain growth and development. The ten major industries of steel, automobiles, ships, petrochemicals, textiles, light industry, nonferrous metals, equipment manufacturing, electronic information, and logistics are closely related to the FRP industry. These ten major industries rely on the opportunities of my country's urban industrialization and large-scale economic construction of urban and rural integration. This opportunity is aimed at the low-carbon economy of traditional energy conservation and emission reduction and new energy development. FRP composite materials have won opportunities and growth points for themselves with their own innovation. From the international market, the global financial crisis in 2008 put the European and American economies into trouble. The high level of crude oil fell to 50 US dollars a barrel. There was a periodic market surplus of chemical raw materials and prices fell. From a domestic perspective, the glass fiber stage Due to the systemic, structural and regional out-of-control development, the annual output has exceeded more than 2 million tons, and about half of it is exported overseas. When the financial crisis hit, exports were blocked, and a large amount of glass fiber was "redirected" to China to lower prices for each other.

The sharp decline in the prices of chemical raw materials and fibers has given the FRP composite industry a good opportunity that has not been seen in many years, providing conditions for its low-cost expansion, which has also driven the growth of resin.

In 2009, the UPR industry presented five major trends and hot spots: the continuous growth of the popularity and improvement of the fiberglass reinforced plastic composite industry, which went hand in hand. On the one hand, it drove the expansion of low-cost, general-purpose resins; on the other hand, The development of the emerging FRP market has promoted the growth of high-performance and personalized resins. This is reflected in the comprehensive spread of o-phenylene winding resin, vacuum resin, SMC/BMC resin, pultrusion resin, polyester and paraben modified resin. In addition, the market demand for high-performance FRP composite products such as fan blades, electrical switches, pressure pipes, power components, desulfurization, high-speed train interior and exterior decorative structural parts, luxury yachts, work boats, sports boats, etc. has also increased the demand for m-phenylene type, environmentally friendly The rapid growth of oxyethylene vinyl ester type vacuum resin, SMC/BMC resin, etc. shows the "hotness at both ends" of the resin market. State-owned enterprise restructuring represented by Tianma, Tianjin Hecai, Feilong and Huachang, domestic large-scale private enterprises represented by Yabang and Tianhe, domestic scientific and technological personnel combination enterprises represented by Huake, DSM, Huari, Foreign-funded enterprises represented by Changxing, Ashland, Showa, and Shanwei are taking the lead on the domestic UPR stage and leading the market.

The second trend and hot spot is the rapid development of cast resin. In the past few years, in the face of weak overseas markets, cast resin handicrafts have rapidly entered the domestic construction and decoration market, entering buildings and high-end shopping malls in large quantities, and achieved very obvious results. The technological advancement of cast artificial stone has moved from countertop panels with a wide range of surfaces to mechanically formed artificial marble and artificial quartz stone panels, which are widely used in wall decorations and floor materials. Stone companies in Fujian, Guangdong, Shandong and other places have begun to shift from mining to synthetic stone manufacturing. The output of resin for artificial stone in the country in 2009 exceeded that of the previous two years. Traditional casting products such as polyester buttons, putty resin, and mining riveting resin continue to maintain good growth momentum.

The third flow and hotspot is Jiangsu, Shanghai and Tianjin, which have become very active regions in the development of UPR in China in recent years, and lead the domestic UPR and composite materials market with technological innovation and new product development. Trend, promote the popularization and improvement of domestic UPR composite material market. In 2009, UPR production in this region accounted for more than half of the country's total, with 95% of the production of epoxy vinyl ester resin concentrated in Shanghai and Jiangsu. This area is also a dense production area for Chinese and foreign UPR companies. Foreign-funded companies such as Huari, DSM, Ashland, Changxing, and Showa Shanwei that have entered earlier have transferred mature overseas industrial markets to the country, occupying the domestic mid- to high-end market advantages. There are also a group of companies such as Tianma, Huachang, Yabang, Felong, Huake, China Resources, Tianma Ruisheng, Fuling, Xinghe and other companies. What needs special mention here is the "Yabang" phenomenon in the domestic UPR industry. In 2009, Yabang produced 170,000 tons of resin. With the simple emotion of an industrial chain, "there is me and you" and "you and I", Yabang is closely close to the market and customers, and vigorously develops low-cost general-purpose resins, high-performance crystal resins and stone resins to provide The industry has made contributions; output has ranked first in the country for five consecutive years. Over the years, Yabang's sales companies across the country have developed from single resin sales to "one-stop" services for raw materials used by FRP companies; Yabang's sales companies across the country are also Yabang's branches, providing good materials and services. At the same time, by actively conducting market research, they can quickly reflect the dynamics of the FRP industry across the country within 12 hours. Yabang becomes bigger and stronger through continuous interaction with enterprises in the market.

The fourth flow direction and hot spot is the high performance requirements of megawatt-level fiberglass blades, which has accelerated the technological advancement of UPR and epoxy vinyl ester resins. The domestic megawatt wind power market has entered a period of rapid development since 2007, with an average annual new installed capacity of more than 6 million kilowatts, and the total installed capacity in 2009 reached 20 million kilowatts.

Calculated based on 1.5 MW, the total annual blade production will reach 15,990 pieces, and the resin consumption will reach more than 50,000 tons. In addition, the resin consumption for blades exported by foreign-funded wind power enterprises will reach more than 70,000 tons, of which 50% will be UPR and epoxy vinyl ester. Resin my country's patented technology for megawatt fiberglass fiber reinforced plastic blades was introduced from Germany and the Netherlands. It has high performance standards for fibers and resins and has been demonstrated by Deutsche Veritas GL. The two "thresholds" have put forward extremely strict requirements for domestic resin and fiber companies. Foreign-funded enterprises Ashland, Shanwei and DSM are qualified and familiar with the industry, and have taken the lead in the domestic wind power megawatt blade market. Megawatt blades are an extremely complex system engineering from blade shape design, structural design, paving design, mold technology to blade manufacturing. The blades have a long operation period of 20 years, which is a "test" for resin companies. Resin companies are "attempting" into the megawatt blade market, mainly relying on the company's independent technical strength. The fifth trend and hot spot is the development and improvement of domestic fiberglass composite equipment manufacturing. The SMC, winding, pultrusion, artificial stone, molding and other equipment and mold design and manufacturing in Jiangsu, Zhejiang, Hebei, Shandong and other provinces not only meet domestic demand, but are also exported in large quantities. The improvement of equipment technology has led to the improvement of UPR performance and quality and the increase in demand for medium and high-end resins. In 2010, the domestic UPR industry still has great room for development. Foreign-funded enterprises believe that China is the country with the fastest economic growth in the world and the world's largest composite materials market. They are full of confidence in China's development. DSM, Huari, Ashland, etc. are making plans to expand capacity and production. In addition, Recode will also start production in Tianjin. The country's resin production giants Yabang, Tianhe, Futian and Huaxun are all expanding.

Another phenomenon that cannot be ignored in the domestic UPR development trend is that new development layouts of the FRP composite industry will appear in the central and western regions, southwest and other regions. According to the understanding of relevant parties, around Xi'an, Luoyang and central and southern Shanxi, around the implementation of "zero tariff" in trade between ASEAN and my country and the construction of the Southwest, around Gansu and Xinjiang chemical raw material supporting bases, the construction of the Northwest and exports to West Asia and other regional The demand for FRP composite materials is rising day by day, and large-scale UPR and fiberglass companies will soon appear in these areas. By the end of 2009, there will be more than 160 UPR enterprises in my country, and 2/3 of the enterprises have been transformed from township enterprises into private enterprises and private enterprises. Some of these enterprises actively introduce technical talents and advanced equipment to improve themselves and gradually establish their brands. However, the vast majority of enterprises lack technology and are struggling, and some are even "making a mess". These companies face two solutions, one is to develop downstream products, and the other is to improve the company through technological progress. These two paths will not work. The only way is to let the market eliminate you. It can be expected that the UPR industry will face continuous integration and reorganization in three, five and eight years, and the growth mode of resin will change from an increase in output to an upgrade in brand and quality.

2. Low-carbon economy and FRP emerging markets

The term "low-carbon economy" was first used in the 2003 British energy white paper "Our Energy Future; Creating a Low-Carbon Economy" . As a pioneer of the first industrial revolution and not rich in resources, the UK is fully aware of the threats of energy security and climate change. According to relevant reports, the world's annual carbon dioxide emissions are now close to 30 billion tons. Large amounts of carbon dioxide are emitted, causing global climate warming and seawater intrusion. The United Nations Intergovernmental Panel on Climate Change has warned that climate warming will cause sea levels to rise by 18-59 centimeters per year. At this rate, by 2100, some low-lying island countries and 32 deltas at the forefront of climate change will Fully or partially submerged by sea water. Advanced developed countries have regarded carbon dioxide as an air pollutant and have increased carbon emission taxes accordingly.

The world has experienced three development periods in the low-carbon economy in the past ten years. In December 1997, the Third Conference of the Parties to the United Nations Framework Convention on Climate Change held in Kyoto, Japan, adopted the Kyoto Protocol, which limits greenhouse gas emissions from developed countries to curb global warming.

The Protocol stipulates that by 2010, the emissions of six greenhouse gases including carbon dioxide in all developed countries will be reduced by 5.2% compared with 1990. The protocol has no mandatory emission requirements for developing countries such as China and has been approved by more than 170 countries.

The second meeting was on December 15, 2007. The Thirteenth Conference of the Parties to the United Nations Framework Convention on Climate Change was held in Bali, Indonesia, and the "Bali Road Map" was adopted. The main contents include: substantial reduction of global greenhouse gas emissions, and future negotiations should consider setting specific greenhouse gas emission reduction targets for all developed countries (including the United States); developing countries should strive to control the growth of greenhouse gas emissions, but do not set Set specific goals; in response to global warming, developed countries are obliged to provide assistance to developing countries in terms of technology development and transfer, financial support, etc. The Bali Roadmap includes the United States in the negotiation process for the first time and requires all developed countries to fulfill their responsibilities for measurable, reportable, and verifiable greenhouse gas emissions. In addition, the "Bali Roadmap" also emphasizes the need to pay attention to the three major issues of technology development, transfer and financing to adapt to climate change. In terms of goals, the "Bali Roadmap" proposes that developed countries should reduce emissions by at least 25 to 40% by 2020 based on 1990 levels. The third meeting was held from December 7 to 18, 2009, with 15,000 representatives from more than 190 countries and regions around the world, and the United Nations Climate Change Conference was held in Copenhagen, Denmark. There were big differences on the issue of emission reduction at this meeting, mainly on the proportion of emission reduction and the amount of funding. The United States, China, Brazil and other countries are already major greenhouse gas emitters in the world. The expressions of China and the United States at the meeting gave the participating countries hope. Before the meeting, China had officially announced action goals for controlling greenhouse gas emissions on November 27 last year, deciding to reduce carbon dioxide emissions per unit of GDP by 40 to 45% by 2020 compared with 2005. Previously, the White House of the United States announced that it would The Climate Change Conference pledged to achieve the interim goal of reducing greenhouse gas emissions by 17% from 2005 levels by 2020. At the Copenhagen Conference, more than 20 developed countries privately drafted an emission reduction target to be adopted. However, it encountered opposition from developing countries. The United States has also been unable to legislate on specific emission reductions because it is "difficult to turn around a large ship". This meeting had different opinions on specific emission reduction targets, but ultimately a consensus was reached to accelerate the universal adoption of environmentally friendly technologies and accelerate global carbon reduction.

Today, we are talking about low-carbon economy, which is an economic model based on low energy consumption, low pollution and low emissions. Its essence is energy efficiency and clean energy use. The core is energy technology innovation, Institutional innovation and fundamental changes in the concept of human survival and development. The mainstream understanding of low-carbon economy refers to an economy that reduces greenhouse emissions as much as possible. It is mainly reflected in: In terms of industry, high-efficiency production and energy utilization; in terms of energy structure, renewable energy production will account for a high proportion; in terms of transportation, the use of efficient fuel, low-carbon emission means of transportation, public transportation will be replaced private transport, and greater use of bicycles and walking; in terms of architecture, energy-efficient materials and energy-saving construction methods are used in office buildings and domestic housing. The bottom line is to gradually reduce carbon emissions per unit of GDP. "Low-carbon economy" is not just a new concept, but the growth point of the next round of new economy. Regarding the prospects of my country's economic development, in the past, "Made in China" has faced pressure to reduce emissions. The way to reduce carbon emissions will be through technological upgrading of production processes, production tooling, production means and "low-carbon technology" of technological innovation. The implementation of carbon technologies forms "low carbon standards" to achieve low carbon, high growth, low carbon and cost reduction. The promotion of low-carbon technology is closely related to the FRP industry. In the 1960s, the FRP industry entered the market with the simple concept of "replacing steel and wood". FRP has a high specific strength and can replace steel and metal materials in large quantities; in order to save resources, it can replace wood in large quantities. With decades of market operation in the FRP industry, many excellent properties have been derived, highlighting its plasticity, designability and versatility.

Its plasticity endows various characteristic molding processes; its designability simplifies traditional manufacturing processes, reduces costs, and achieves optimized combinations of materials and properties; its versatility manifests itself in excellent electrical properties, chemical performance, aging resistance, fatigue resistance, water resistance, combustion resistance, etc. It can be seen that the low-carbon technology promoted by the future industry to achieve a low-carbon economy cannot be separated from FRP; at the same time, it also provides new development space for the FRP industry.

From the industries we are currently familiar with, vehicles, shipbuilding, water treatment, chemical anti-corrosion, building energy conservation, etc. will all face the constraints of the global low-carbon economy. FRP composite materials have become and will realize the industrial low-carbon economy in the future. important choice of materials. Low-carbon emission means of transportation include: cars, buses, engineering vehicles, commercial vehicles, high-speed trains, ships, aircraft and aerospace vehicles. Qingdao Luomeiweiao New Material Products Co., Ltd. is a domestic manufacturer specializing in lightweight fiberglass interior and exterior structural parts for high-speed train bodies. Over the years since its establishment, the company has actively adopted international advanced product standards, selected raw materials, and met the requirements and standards for vehicle body weight reduction. The first batch of accessories have been successfully used on the Beijing-Tianjin intercity high-speed railway. At present, the company's car body parts have received a large number of orders from Qingtie, Tangtie, and Changtie, and the supply exceeds demand. Starting from the concept of low-carbon economy and through the implementation of low-carbon technology, Romevio has reached the low-carbon standards specified for accessories and has become the best supporting enterprise in achieving high-speed and low-emissions in domestic rail transit. It has also been awarded the title of "Superior Supplier" by the internationally renowned company Siemens. Another example is the Guangxi Guilin Daewoo Bus Company, together with its FRP supporting companies, they have changed the past phenomenon of "buying and selling FRP products by the pound" and jointly launched a design process aimed at weight reduction and low carbon. In the field of transportation, my country's ships have great development prospects. The realization of low carbon emissions and weight reduction of large steel ships has been put on the agenda. In a few years, if they cannot meet the 15 emission reduction requirements of international conventions, they will not be able to enter the high seas; my country's fiberglass yacht market has passed the carbon emission design specifications and lightweight interlayers Structural design will gradually replace the structural emphasis on single-board design. Yachts will become lighter, faster and consume less energy. Water treatment technology and water resource development will be important markets for the emerging FRP industry in the future. Hebei Zhongyi Composite Materials Co., Ltd. and Beijing Institute of Technology jointly developed research and mobile winding equipment for ultra-large FRP pipes that are resistant to seawater corrosion. Some companies are also paying attention to the development and application of fiberglass high-pressure pipes in seawater desalination technology.

Compared with developed countries, our FRP industry lags behind in terms of facing the "low-carbon economy". As the concept of low-carbon economy continues to gain popularity, domestic industries will need to re-interpret and re-understand the necessity of accelerating advancement. Domestic traditional export products are still wandering in the "high-carbon economy" and are likely to encounter a new round of "green barriers" of "carbon tariffs". For each industry in which FRP materials participate, the concepts and measures of "low-carbon economy", "low-carbon technology" and "low-carbon standards" must be integrated to truly make our FRP materials a supporting, cost-effective and strength-to-weight ratio for all walks of life. The best lightweight materials, functional materials and structures allow low carbon to truly synchronize with the "glass fiber reinforced plastic economy".

3. my country’s wind power market and megawatt-level fiberglass blades

Developing clean energy and wind power generation are major events for the world to achieve a low-carbon economy. my country’s total installed wind energy capacity has ranked first in the world. Four. To develop megawatt-level wind power generation, our country lacked complete sets of technology at that time. The state decisively organized enterprises to introduce mature European technologies, which enabled my country's wind power industry to grow extremely rapidly. How is my country's wind power market? What are the prospects? Here we analyze some numbers:

The above data shows that my country is very rich in wind energy resources. The total installed capacity of grid-connected wind power that has been utilized only accounts for 6‰ of the total resources and 1.8% of the total installed capacity of the country’s electric power. Compared with Denmark and Germany, which are developed countries in wind energy utilization in Europe, there is a huge gap. In addition, judging from my country's current wind power grid connection, nearly one-fifth of the wind energy equipment is not connected to the grid (2000-1613=387).

It was also learned from relevant parties that in recent years, my country's wind power industry has become worrying. There are more than 80 megawatt-level complete machine companies and more than 70 megawatt-level blade manufacturing companies. Compared with advanced developed countries and the current domestic situation, it is obviously a bit unsatisfactory. "It's a fish out of sight" and "It's hard to get off the tiger". Soon, a document from the National Development and Reform Commission pointed out that wind power generation was also facing overcapacity. Immediately afterwards, the country canceled the requirement of 70% localization rate of wind power equipment. The overcapacity of wind power and the cancellation of the 70% localization requirement are a timely sobriety injection given by the state to my country’s wind power industry. At present, on the one hand, there is low-level duplication of construction, on the other hand, there is a lack of efficient and advanced equipment. National policies have been introduced to make market choices more transparent and clearer, which has practical and far-reaching significance for promoting the healthy development of my country's wind power industry. .

Megawatt-level fiberglass blades account for about 20% of the cost of the entire wind power equipment. Blade design, material selection and technology are the main factors that determine the performance and power of wind power installations, as well as the unit cost of wind power generation. Looking at the development trend of global blade technology, and taking into account the two factors of fan efficiency and cost reduction, the production of blades is developing towards large-scale development. The greater the power of a single machine, the lower the power generation cost per KW. Therefore, wind power equipment around the world is developing towards megawatt-level high power and long blades. The typical Danish LM company is the largest wind power group in the world, with 28 years of practical production experience. Its annual blade output reaches more than 10,000 pieces, and it has set up factories in Tianjin and Qinhuangdao, China. LM is also the only company in the world with In-House testing capabilities that can conduct Full-Scale testing of its blades. All newly designed blades must pass 20 years of operating conditions testing before being approved for production. These test items include static, dynamic, lightning strike tests, etc. The laser scanner in the test equipment provides precise geometric data for the blades. The longest blade currently produced by LM Company is 61.5m, which is the longest blade in the world. It weighs 17.7 tons and is made of epoxy-based glass fiber reinforced composite material. The blade ends and other parts are made of carbon fiber. It has been installed in REpower Company of Finland. On a 5MW offshore wind turbine. LM Company's blade manufacturing technology includes laying glass fiber with multifunctional manipulators to improve the laying progress25; innovating in the support force of bolts to increase the length of the blade20; using the RIM method to shorten the resin penetration time15-20; replacing it with FRP molds Steel mold to achieve low cost. According to relevant information, the Danish National Advanced Technology Foundation allocated 60 million Danish kroner for LM Company to conduct innovative new blade technology research. The research project was named "King of Blades". The blades are made of mixed yarns of FRP, C fiber and thermoplastic materials. After this yarn is laid into the mold, the mold is heated and the plastic yarn melts, which will shorten the production time of the blades in half. In terms of blade design, LM also introduced a new blade concept with elastic deflection 10 years ago, referred to as a pre-bent blade. The blades are curved outward at the tip, allowing the blades to maintain a certain distance from the tower during rotation, even in strong winds, to prevent the blades from hitting the tower. Pre-bent blades have a larger allowable bending amount and comparable stiffness, thus reducing the amount of material and weight, thereby capturing more wind energy. According to relevant sources, compared with standard blades, this kind of pre-bent blades can start the wind field at a wind speed of 2.6m/s. It is understood that in a joint project between LM Company and GE Company, a case analysis was conducted on the development of extended blades to increase power. The 37.5m long blades on the original 1.5MW wind turbine were replaced with 40.3m long blades. The results showed that the power generation increased by 7 , the reason is that the outer circle sweep area increases by 14.8% compared to the inner circle sweep area. It can be considered that the design and manufacturing technology of LM's megawatt blades are the most advanced and competitive in the world.

In China, AVIC Huiteng relies on continuous innovation to take the lead in the wind turbine blade industry. It is an enterprise with independent technology and self-developed UPR-based FRP blades. Its 600kw-750kw blades account for more than 90% of the domestic total, and it has successfully adopted high-performance UPR in the development of 37.5m blades. The company's blade installed capacity accounts for nearly half of the country's total over the years.

In the process of seeking technical cooperation, the company has participated in technical exchanges and cooperation with nine wind blade companies in the Netherlands, Germany, and the United Kingdom. The project has established China's MW-class blades' domestic technology independent capabilities. The main features of Whitten blade technology include patented structural damping (reducing vibration), proprietary tip technology (providing aerodynamic performance to reduce noise), mirror mold technology, rapid room temperature solidification technology, high-precision balancing technology, high-precision blade root positioning technology, etc. Taking a 1.5MW, 6-ton blade as an example, the weight error of each blade is less than 1kg, and the center of gravity deviation does not exceed 10mm. Therefore, the starting wind speed only needs 2.6m/second, and the power generation wind speed is 3m/second. The company has currently developed 2MW blades and is conducting new blade design work based on wind field requirements. Domestic companies that have formed mass production include Zhongfu Lianzhong, Beijing Sinoma FRP Research Institute, Shanghai FRP Research Institute, etc. FRP products supporting wind power equipment also include cabin covers and deflectors. There are four domestic companies that use the most advanced vacuuming and LRTM processes: Shuangyi, Huayi, and Zhupit in Dezhou, Shandong, and Jiangsu's Yaxi Road Company, most of its products are exported to foreign companies. Changzhou Huari New Materials Co., Ltd. was the first to provide these companies with high-strength, low-viscosity, and low-heat UPR with excellent performance.

In order to reduce the cost of power generation, in addition to blade design, materials and processes are changing with each passing day. Through the selection of materials and processes, lightweight and functionalization are achieved, thereby improving the efficiency of wind energy. In order to obtain the best cost performance for blades, OCV has launched high-performance Advantax glass fiber in the global blade market in recent years. Compared with E-glass fiber, this glass fiber has high strength and modulus and has been successfully used in megawatt applications. Grade blade manufacturing. Recently, OCV has applied S-glass fiber to larger blades. The modulus of S glass fiber reaches 85.5Gpa, which is 18 higher than that of E glass fiber and the strength is 33 higher. From a technical point of view, S glass fiber with high strength and high fracture strain is more advanced in wind turbine blades. Recently, PPG Corporation introduced high-performance, high-strength, fatigue-resistant glass fibers to the global wind energy blade industry. According to reports, the developed HYBON2026 has a tensile strength 20 times higher than the glass fiber products currently used to make blades on the market, and the fatigue resistance is also several times higher. Relevant domestic enterprises have also carried out a lot of research and development work on materials that meet the needs of megawatt-level blades. Chongqing International has developed ECT and TM high-performance fibers, and its sales account for 1/3 of the domestic glass fiber consumption for megawatt-level blades. In 2009, it also exported 25,000 tons of high-performance fibers to Western Europe. In addition, high-performance fibers such as Taian's GMG and Jushi's E6 have also entered the market. The continuous increase in blade length has led to the continuous expansion of the application of lightweight, high-strength carbon fiber in wind power generation. The decline in the price of large-tow carbon fiber has become the preferred structural material for wind turbines. The same 34-meter-long blade is made of GF/UP with a quality of 5800 In kilograms, the mass is 5200 kg using GF/EP and 3800 kg using CF/EP. Therefore, the trend in blade material development is to use CF/EP, but it also faces price pressure. Foreign countries are conducting in-depth research on cost reduction from raw materials, process technology, quality control and other aspects. According to relevant information, in order to increase the stiffness of the blade and prevent the pre-bent part of the blade tip from hitting the tower, carbon fiber will be widely used in blades with a length greater than 50m.

Lightweight closed-cell high-strength foam is another major component of blade materials and is used in structures. According to Swedish DIAB company information, it can be used for 60-meter-long wind turbine blade core parts. Using this core material and diversion technology can reduce cycle time by 50% and labor costs by 30%. Compared with open technology, sandwich diversion technology reduces styrene emissions by 90% and makes the entire blade lightweight and high-strength. . The PVC profile board launched by DIAB at its Kunshan factory in China is directly used in blade production according to the product's "tailor-fitting", saving time, materials and reducing costs. Foreign-funded companies currently producing blade foam structures include Gurit Tianjin Company, Alcan Shanghai Company, etc. Domestic Changzhou Tiansheng Company cooperated with relevant scientific research institutes and successfully developed structural foam last year.

With the development of offshore wind power, higher performance requirements are placed on blades. Lightweight, high strength, high elasticity, and fatigue resistance will promote the continuous production of new materials. Bayer recently launched a commercial brand of Baytube carbon nanotubes for use in epoxy resin to enhance blade fatigue resistance, impact resistance and improve material resilience. The company revealed that using carbon nanotubes in resin will reduce the blade's weight by 20-30% and increase its strength by 30%. New trends have emerged in the blade molding process. After Zhongfu Lianzhong Company has completed the prepreg molding process, blade manufacturing has changed from wet molding to dry heating molding; Germany's Siemens has created an original overall blade molding process. forming. The application of these new technologies further improves the dimensional stability of the product and shortens the process time.