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A large rotor area at low wind speed allows production of energy when conventional fixed axis wind turbines produce little or none.
A small rotor area at high wind speed allows safe operation and continued power production when conventional fixed axis wind turbines furl down. The Appropriate Energy wind turbine does not furl down.
Varying rotor area according to wind speed
The ability to vary the rotor area allows the use of rotor blades up to five times the size of rotor blades of similar rated conventional turbines. These rotor blades capture more energy at low wind speeds.
At a wind speed of 4.5m/sec the Appropriate Energy wind turbine produces 200% more energy per unit of installed cost than the conventional fixed axis wind turbine. |
