There are a number of wind power turbine design styles on the market and this document details the completely unique Savonius wind turbine. Unlike the more basic horizontal home wind turbine designs, the Savonius turbine is based on a erect architecture that relies on vertical vanes to turn in the wind. This rotation is then transferred through a vertical shaft to the generator for the generation of electricity. This wind turbine is the perfect choice for applications that take minimal power, but maximum reliability The simplicity of the Savonius design makes it a popular choice among applications that require as little maintenance as possible.

In the scope of wind generated power there are different styles of devices used to capture the power of the wind and convert 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 is a vertical axis wind turbine (VAWT). This means that the actual piece of the turbine that spins looks more like a rotating canister that fasten to a vertical shaft coupled to the generator also mounted vertically near ground level. This vertical shaft then catches the wind, spins the shaft to the generator to generate the electrical current.

The fundamental design of this variety of wind turbine was completed in 1922 by Sigurd Savonius, a Finnish design engineer. This type of turbine is used quite often because of it's straightforward design and reliability. Additionally, because it spins on a level 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 immediately to changes in wind direction. This type of turbine is considered a "drag style" turbine from an aerodynamic point of view.

It is designed on the principle that because of the canisters shape, it experiences more drag when moving with the wind than against it and it benefits from the differential created and changes it to rotation. Since in general drag type turbines are not as efficient, it does not deliver as much power as its more usual horizontal cousin, but can still have a broad range of applications. This kind of wind turbine is used in the majority of the atmospheric surveillance stations around the world since these tend to be located in isolated areas and the importance of reliability and low power consumption make the Savonius wind turbine a perfect choice.

They are also used on other inaccessible locations like buoys far out in the ocean. They are also sometimes used to attract attention to advertising signs. In this application they are not used to make 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 unique design that lends itself to many varied applications. Its simplicity and reliability make it the perfect choice for situations that require low power generation, but rock solid performance

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