Domestic carbon fiber blades increase cost and welcome new opportunities
Karbon fiber bez is a high performance fiber material formed by pyrolysis and carbonization of polyacrylonitrile, pitch-based and other organic fibers (original fibers) in a high temperature environment. It has the properties of light weight, high strength, corrosion resistance, fatigue resistance, and small expansion coefficient.
Before 2015, the process of carbon fiber application in wind turbine blades was mainly glass fiber carbon fiber glass prepreg and vacuum infusion, and some small tow carbon fibers were used, and the average price was high.Beginning in 2015, Vestas disassembled the stress-bearing part of the main beam of the integrally formed main beam of the fan blade into high-efficiency, low-cost and high-quality pultruded beam standard parts, and then used relatively more economical large tow materials to convert the standard parts. Pieces are assembled at one time and integrally formed. Through this pultrusion process, the volume content of carbon fiber is greatly increased, the mass of the main bearing part is reduced, and the cost of carbon fiber is reduced, leading wind turbine blades into the carbon fiber era.
According to the data of the Global Wind Energy Council (CWEA), between 2015 and 2021, the demand for high modulus carbon fibre in the global wind power field has rapidly increased from 18,000 tons to 33,000 tons, accounting for about 30% of the total global carbon fiber demand in 2021; Vestas' carbon fiber consumption is around 25,000-28,000 tons. Carbon fiber wind turbine blades have become the largest downstream market for carbon fiber.