The earliest vertical axis wind turbine is an arc double-blade structure (φ type or Darieu). Because of its small wind area and high starting wind speed, it has not been developed vigorously. China has made some attempts in the past few years, but the effect is always unsatisfactory. A friend asked: Why did you use φ-shaped design instead of H-shaped structure? In fact, this is closely related to the development of science and technology, especially the development of computers. Because the design of H-type vertical axis wind turbine needs a lot of stomatal mechanics calculation and digital simulation calculation, it takes at least a few years to calculate by manual method, and the correct result can not be obtained once, so people can't complete this design idea at all in the era when computers are not very developed.
Due to the need of special application, China took the lead in this research in 200 1 and continued to improve the products in the next two years. At the beginning of 2003, the product was mature, and the wind-solar complementary system with this new vertical axis wind turbine as the main equipment was widely used in the island and the frontier.
MUCE company and a Japanese company are the main R&D and production units of this product in the world.