Covestro, Goldwind and LZ Blades develop 64.2-Meter Polyurethane Wind Turbine Blade
Polyurethane Blades for the Wind Power Industry
According to the company's own information, the Materials manufacturer Covestro has successfully developed the world’s first 64.2-meter wind turbine blade made completely from polyurethane resin. The blade, made jointly with Goldwind, a chinese wind turbine manufacturer, and LZ Blades, a wind blade manufacturer, represents a breakthrough in the application of polyurethane resin in large-scale wind turbine blades.
The polyurethane wind turbine blade, from the spar cap to the shear web and the shell, is made entirely of polyurethane infusion resin, making it the first of its kind in the global wind power industry. Extensive static and dynamic fatigue tests are being carried out to evaluate the durability of the wind turbine blade before small-scale production commences in 2020.
“In the course of our R&D cooperation with Goldwind and LZ Blades, the superior properties of polyurethane resin were further proven through this trial production. We believe that Covestro’s solution can greatly contribute to the sustainable development of the wind power industry,” said Dr. Irene Li, Head of Application Development Asia Pacific in the Polyurethanes segment at Covestro.
Decreased Costs and Increased Benefits for Wind Power Enterprises
Test results showed that the polyurethane resin displays better mechanical properties compared with traditional epoxy resin. As it does not require post-curing and has a lower viscosity and faster infusion speed, the polyurethane resin system can greatly improve the efficiency of blade production, thus increasing the competitiveness of blade manufacturers. In the end, the solution with the polyurethane resin is more cost competitive than the one with the epoxy resin.
In addition, Goldwind has optimized the structural design of the blade, giving better play to the advantages of polyurethane’s mechanical properties and infusion speed and ensuring the smooth production of the blade.
Covestro Deutschland AG
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