There are an abundance of wind turbine design types on the market and this document describes the exceptional Savonius wind turbine. Unlike the more basic horizontal wind turbine designs, the Savonius wind turbine is based on a upright architecture that relies on scoops to revolve in the wind. This rotation is then transferred through a vertical shaft to the generator for the generation of electricity. This turbine is the best choice for applications that demand minimal power, but extreme dependability The simplicity of the Savonius design makes it a popular choice among applications that require as little maintenance as possible.
In the field of wind generated power there are different styles of devices used to capture the power of the wind and turn it to electricity. Most of the designs follow the typical style of a windmill, or airplane style propeller that sits atop a tower and rotates to catch the wind. The Savonius wind turbine style is different in design because it's a vertical axis wind turbine (VAWT). This means that the actual part of the turbine that spins looks more like a spinning canister that attach to a vertical shaft joined to the generator also mounted vertically near ground level. The vertical cylinder then catches the wind, spins the shaft to the generator to create the electrical current.
The initial design of this type of wind turbine was completed in 1922 by Sigurd Savonius, a Finnish design engineer. This variety of turbine is used today quite often because of it's simple design and reliability. In addition, because it spins on a horizontal axis, there is no need to have a directional mechanism to keep the unit aligned with the wind like other types. It can catch the wind in any direction and reacts instantly to changes in wind direction. This kind of turbine is considered a "drag style" turbine from an aerodynamic point of view.
It is based on the principle that because of the canisters shape, it experiences more drag when moving with the wind than against it and it takes advantage from the differential created and converts it to rotation. Considering in general drag type turbines are not as efficient, they does not create as much power as its more familiar horizontal cousin, but can still have a wide range of applications. This design of wind turbine is used in most of the atmospheric surveillance stations around the world as these tend to be located in isolated areas and the value of dependability and low power consumption make the Savonius wind turbine a perfect choice.
They are also used on other out of the way locations like buoys far out in the ocean. They are also sometimes used to draw attention to advertising signs. In this use they are not used to generate any power, but have opposite sides painted contrasting colors to clutch your attention as they spin. So in general the Savonius home wind turbine is a very original design that lends itself to many varied applications. Its reliability and simplicity make it the perfect choice for situations that require minimum power generation, sure performance
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