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“Eggbeater” VAWT Design More Powerful and Efficient


The Darrieus eggbeater vertical axis wind turbine (VAWT) has a new iteration which claims to produce 35% more annual kilowatt hours than any other turbine within the same swept area and price point.

The new iteration produces considerably more power at a mounting point 25% lower than competitors thereby enabling the point of use to be closer to the point of origin.

The Canadian company Harvistor developed the five blade wind generator, the DARWIND5 turbine, which is said to be effective in turbulent wind sites. Harvistor purports to be the world’s first designer and licenser of low mount small wind turbines. The DARWIND5 turbine may lead the way for a new generation of generators that provide solutions where other turbines fall short.

Unlike competitors, the DARWIND5’s technology, which includes advanced airfoil, blade shape, and Smart Pitch Angle Regular (SPAR), produces quiet and responsive power generation in low mount turbulent wind sites. DARWIN5 increases kilowatt hours by 35% – more than the same sized, same priced leading competitor, while providing a 25% lower mount height.

Airfoil shapes boosted the performance of the turbine by allowing the rotor system to avoid dynamic stall. The 1.2 meter working diameter and 1.9 meters tall DARWIND5 can be tilted for cleaning and repair and can operate in wind speeds from 4 m/s to 24 m/s. Harvistor claims that by spending $4,295.00 (CDN) for the 500 W version or $6.995.00 (CDN) for the 1.5kW turbine, buyers will see a return on investment in 5 to 7 years.

[via treehugger]

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