A small wind generator uses a long shaft with two different turbines on either side of a generator to produce more power than a single turbine. The developer, Shanghai-based Forevoo, says the design starts generating power in only 1.5 m/s wind speed and it works in a wider range of wind speeds than single-rotor designs.
The developer says the back or trailing rotor uses five to seven blades in a diameter smaller then the other rotor. The trailing rotor gets the unit spinning in slow wind while a main or front rotor works better wringing energy from high-speed wind. The accompanying images show a few of the company’s nontraditional designs.
Forevoo lists no power rating for their turbines but suggests they are applicable to off-the-grid locations, such as telecom base stations, bridge and road lamps, and remote locals like the Mongolian grasslands.
Filed Under: Turbines