SAVONIUS ROTOR PDF

Each of the blades has an outer edge and an inner edge with the outer edges of the blades lying on a circle which define the diameter of the rotor. Each of the blades has a linear portion adjacent to the inner edge and a first curved portion which is substantially an arc of a circle tangent to the linear portion and tangent to the circle defining the rotor diameter. A second curved portion is substantially coincident to the circle defining the rotor diameter. Description I. Field of the Invention This invention pertains to a wind turbine. More particularly, this invention pertains to a wind turbine with a Savonius-type rotor assembly.

Author:Nem Mooguran
Country:Malawi
Language:English (Spanish)
Genre:Spiritual
Published (Last):18 January 2011
Pages:238
PDF File Size:2.52 Mb
ePub File Size:14.60 Mb
ISBN:968-7-27674-642-9
Downloads:35659
Price:Free* [*Free Regsitration Required]
Uploader:Balkree



Michael Hackleman introduces a very effective wind energy device made from 55 gallon drums. The Savonius or S-rotor is from California-based farm research center Earthmind, which specializes in alternative energy experiments. In this article Michael Hackleman introduces a very effective wind energy device most of us have never seen or even heard of. The Savonius or S-rotor was introduced to this country way back in but suffered stiff competition from the already perfected multi-blade farm windmill and the "more exciting" high-speed propeller-driven generator.

Now Earthmind - a California farm research center that specializes in alternative energy experiments-has revived the S-rotor in a very impressive fashion. Until now, however, only one type of wind charger has been readily available: the propeller-driven generator or alternator. The props that spin the generators on conventional wind plants vary in number of blades two, three or four and in the complexity of their aerodynamic surfaces.

This unit is the Savonius rotor often called the S-rotor because of its appearance. Then insert a rod through the center of the assembly, fix its ends in bearings, and the device will rotate when exposed to the wind. If both were tested in wind tunnels, the Savonius design would appear inferior but under normal outdoor conditions the results are almost reversed.

Continue Reading There are two basic types of wind: [1] "prevalent" or "frequent" and [2] "energy. Energy winds come mainly in the form of gusts which "ride on" a prevalent breeze but usually deviate from it in direction by degrees.

The practical importance of this fact can be demonstrated by placing a Stuart mill and an S-rotor side by side in a steady wind. The S-rotor, meanwhile, just speeds up in the rush of air and slows as the velocity drops.

That same characteristic also gives the S-rotor a great advantage in durability. The spinning propeller is just one big gyroscope, and its constant adjustment to the direction of the moving air exerts tremendous forces. The resulting "gyroscopic vibration" has sent many a propeller, generator and tower crashing to earth.

The non-tracking Savonius unit experiences no such problems. Unlike the conventional wind plant-which rotates horizontally and is mounted, along with its generator, on top of a tower-the Savonius device spins about a vertical shaft. This means that its alternator can be mounted on or near the ground.

It also means no tower just a pole-with some guy wires. Think about that: easy access to the alternator, easy lowering of the unit and easy relocation, all minus the expense of an elaborate supporting structure! True, the conventional wind plant must attain a high rpm to operate but the S-rotor-which presents 10 to 20 times-as much surface area to the moving air mass-develops the same power at low rotational speeds.

But so what? Such ratios create no re-starting problems for the S-rotor as they do for a propeller driven unit and are entirely practical for the Savonius machine. The S-rotor has yet another advantage over the Stuart mill. The faster-turning blades of the second design must be well designed and balanced to operate at such speeds.

Since few folks have the tools or know-how to do this, the airfoils or the whole propeller mutt often be purchased at high cost. Our installation has worked successfully at 6 mph, and we believe that some modification of the rotor will lower the necessary speed to 5 mph.

Our test equipment also records information from a separate wind velocity and direction indicator. This way, when normal wind devices would have to shut down because of dangerously high wind speeds, our unit can keep right on going to take as much energy as the rushing mass of air can provide.

The price of all that power is surprisingly low. The latter, if required, is the same kind used in a conventional system. We intentionally purchased all the parts that went into our prototype-alternator, gears and chain, bearings, pipe, stock rod, screws, bolts, eyebolts, guy wire, turnbuckles, paint and stain plus miscellaneous springs, wire, etc. Our second, larger rotor cost less than half as much because we already had most of the necessary parts all but the bearings, gears and chain. Secondhand batteries, like trash, are a growing resource.

We pick up the unit and keep it for a week of rigorous testing with hydrometer, cell voltage tester, charger and dummy load which discharges the device at a known rate. Anne de Bellevue , Quebec, Canada. Share your thoughts. All plans are free. I am also interested in any designs for home made test rigs that can be used to test rotors of this size. I also have the basic design for a rotor which can be manufactured from 1" steel tube and a single sheet of plastic.

Seems to work well but we have not yet figured out a accurate test rig. I would like to buy the plans for this. Do you still sell them and if so what is the current cost? Mother Responds: I am sorry, we do not have the plans for the Savonius.

However, the illustrations for it are in the Image Gallery at the top right of the article, under "Related.

KOSMETYKA STOSOWANA JOANNA DYLEWSKA GRZELAKOWSKA PDF

Savonius wind turbine

Michael Hackleman introduces a very effective wind energy device made from 55 gallon drums. The Savonius or S-rotor is from California-based farm research center Earthmind, which specializes in alternative energy experiments. In this article Michael Hackleman introduces a very effective wind energy device most of us have never seen or even heard of. The Savonius or S-rotor was introduced to this country way back in but suffered stiff competition from the already perfected multi-blade farm windmill and the "more exciting" high-speed propeller-driven generator.

IGNOU READMISSION FORM PDF

DE102011100630A1 - Savonius turbine - Google Patents

Funktionsweise und Bauformen vertikaler Windkraftanlagen Bei vertikalen Kleinwindanlagen gibt es diverse grundlegende Bauformen, die im Folgenden vorgestellt werden. Savonius-Rotoren bewegen sich langsam, der Rotor kann sich maximal so schnell die vorherrschende Windgeschwindigkeit bewegen. Die folgende Animation zeigt die verschiedenen Rotortypen in Bewegung: Animation Von links nach rechts: 1. Vertikaler Savonius-Rotor, 2.

Related Articles