Wind power blades are getting longer and longer, composite materials are indispensable

Composite materials play an important role


In recent years, wind power blades have achieved rapid development. The length of blades has increased from 40-50 meters in 2015 to 80-90 meters or even more than 100 meters today. In the process of continuous upgrading of blade manufacturing technology, composite materials are the core material of wind turbine blades, which play a vital role and determine the cost, performance, and price of the blade.


“Composite materials for wind power are necessary materials for wind power blades, and especially have a significant impact on the performance and strength of the blades,” said Du Guangping, senior consultant of the Wind Energy Professional Committee of the Chinese Renewable Energy Society. At present, the wind power industry has entered an era of parity. Capacity wind turbines will become the dominant product, and the quality and performance of composite materials are directly related to the quality and cost of wind turbines.


Chu Jingchun said: “Whether it is onshore wind power or offshore wind power, wind turbines are gradually becoming larger, which requires large blades to support. When the blades reach a certain length, the innovative application of composite materials plays a very important role. On the one hand, it can make The blades are longer, lighter, and have better performance; on the other hand, it can also improve the aerodynamic load of the wind turbine, increase the power generation, and reduce the cost of electricity.”


“Blade design, manufacturing, and operating conditions directly affect the performance and power generation efficiency of the wind power.” Xia Xiaolin, manager of the product development department of Zhejiang Hengshi Fiber Foundation Co., Ltd., said that the use of new composite materials can improve the mechanical properties of wind power blades. Fatigue performance shortens the production cycle of the blade and reduces the production cost of the blade. “For example, the use of polyurethane materials for blades can improve the mechanical properties by 15%-20%. At the same time, the cost of the main beam of the blade can be reduced by 5%-10%.