Our Technique

In order to increase the performance of a commercial wind turbine, manufacturers have increased the dimension of the rotors. For multi megawatts size machines, the major constraints are the transportation difficulties and the cost of the blades. This cost rises sharply for lengths above 45 m and becomes prohibitive for blades over 60 m. The weight of a blade is proportional to R^2.3 while the power generated is proportional to R^2 (where R = length of blade). Therefore, over a certain length, the price of a blade rises much faster than the power increase advantage.

Eotheme proposes an innovative cost-effective solution: counter-rotating rotors connected to an electrical generator by a simple patented power transmission device. All other components of our wind turbine concept remain unchanged except the blades shape and the control system. Computational fluid dynamics (CFD) in conjunction with field test will improve our understanding of aerodynamics phenomena with counter rotating turbines: this is our major technology challenge.

Our new concept enables the rotors to harness maximum energy from the available wind and has some significant advantages:

Our technique