The Darrieus wind turbine is a type of vertical axis wind turbine (VAWT) used to generate electricity from the energy carried in the wind. The turbine consists of a number of aerofoils usually—but not always—vertically mounted on a rotating shaft or framework. This design of wind turbine was patented by Georges Jean Marie Darrieus, a French aeronautical engineer in 1931.
The Darrieus type is theoretically just as efficient as the propeller type if wind speed is constant, but in practice this efficiency is rarely realised due to the physical stresses and limitations imposed by a practical design and wind speed variation. There are also major difficulties in protecting the Darrieus turbine from extreme wind conditions and in making it self-starting.
Read more about Darrieus Wind Turbine: Method of Operation, Giromills, Cycloturbines, Helical Blades
Famous quotes containing the word wind:
“They went to him and woke him up, shouting, “Master, Master, we are perishing!” And he woke up and rebuked the wind and the raging waves; they ceased, and there was a calm. He said to them, “Where is your faith?” They were afraid and amazed, and said to one another, “Who then is this, that he commands even the winds and the water, and they obey him?””
—Bible: New Testament, Luke 8:24-25.