Vertical-Axis Dual Rotor Wind Power Units

Abstract

The main aim of the study is to develop a wind turbine featuring a high wind energy utilization factor. The study methodology is based on the Darrieus wind turbine theory outlined in the well-known monograph by Academician Sh. A. Yershin. Based on the study results, a few design versions of rotor-type wind turbines with high technical and economic indicators have been developed. The study results application field is wind energy. The presented dual rotor units featuring a high wind energy utilization factor are unique both in design and technical and economic indicators, and have no analogs in the world. The described inventions are protected by patents of the Republic of Kazakhstan. Owing to the autonomously rotating shafts, each of the rotor blades transfers its energy to two different generators, thereby increasing the total energy received by the system. In dual rotor wind turbines, the energies generated by two electric generators are summed up, due to which the obtained wind energy utilization factor ξ is essentially higher than in the case of a simple Darrieus turbine. The results of tests and numerical analyses have shown a high performance of dual rotor wind turbines at wind velocities up to 30 m/s, which points to importance and necessity of making investments in conducting full-scale tests of these wind turbines and their subsequent industrial production.