Wind Funnel Technology to Enhance Efficiency of Low Wind Turbines

The main complication of a Wind Funnel is to turn the entire thing into the wind. Bernoulli and his Physics are very useful in search of a ratio of mouth to throat area with acceptable air flow.

 

A small aerodynamically perfect wind turbine design is easy to build. The turbine would rotate fairly fast.

 

Wind Funnel Technology to Enhance Efficiency of Low Wind Turbines

The main complication of a Wind Funnel is to turn the entire thing into the
wind. Bernoulli and his Physics are very useful in search of a ratio of
mouth to throat area with acceptable air flow.

A small aerodynamically perfect wind turbine design is easy to build. The
turbine would rotate fairly fast.

Savonius Type Vertical Axis Wind Turbine

Two types of vertical axis wind turbines, Savonius and Darius, are mostly used. The Savonius wind turbine was invented by Sigrid Savonius of Finland. Although, the Savonius type of vertical axis windmill less efficient than a conventional design but it does not need to be kept in a single direction. With simple junk like oil drums, car alternator or dynamo, you can build wind generator. This is wind generator will charge 200 watts battery.

Characteristics of Savonius Wind Turbines

Savonius wind turbines are not needed to be installed on high towers and polarity or direction of the wind turbine does not change with the direction of wind and over the land surface and Roof-top installation is normally used. Materials and construction cost is much lower than horizontal axis wind turbines. Split a barrel into half and putting together these two vertically split halves to a vertical axis. This creates a low speed high torque unit that can be utilized for driving water and through a gearing mechanism, generate electricity.

This design works on "magnus principal", an aerodynamic effect. The most everywhere usage of the Savonius wind turbine is the Flettner Ventilator. It employs the design of Savonius wind turbine to drive an extractor fan.

Wind Turbine Alternator - Coils Diagram

Here is a DIY Project for wind turbine alternator.

The alternator has two 12 inch diameter rotors that each have 12 neodymium disk magnets measuring 1.47 inche in diameter and .6 inches thick. Between the rotors is the stator consisting of 9 coils of awg #20 wire, 200 turns each. The coils are arranged to produce 3-phase ac. Each phase has 3 coils wired in series. There are 3 full wave bridge rectifiers, one for each phase. Each is isolated from the other. All three rectified dc outputs are wired together in parallel and the dc is sent via cable to the battery bank.

The stator is made by sandwiching the coils between two pieces of epoxy fiber glass board, the kind used in the manufacture of printed circuit boards. The top and bottom sheets, each 1/16 inch thick, are held together with bolts. They have reinforcing ribs added for stiffness. Power is brought out by means of stainless steel machine screws.

If you’d like to build one yourself, you must know it can theoretically produce 316W, by the formula:

"Watts = Conversion constant * Betz limit * efficiency * area in sq. m * wind^3

In a perfectly efficient turbine,

Watts = .05472 * 59% * 100% * 4.46 * 13^3 =316 watts"

Circuit Diagram of Three Phase Alternator

Of course, things are far from perfect, the guys that made this said they got 70W out of it. That’s pretty good! Make a few similar devices, put them on your block and you’ll never pay for electricity again! (more or less - depending on your consumption habits). Anyway, if you live in an area with high winds, these devices can charge some 12V car batteries so they power your home for the morning and evening, when you get back from work. During the night and the day, they accumulate energy. The only serious "permanent" consumer would be your fridge.

Stamford PMG System (Permanent Magnet Generator) - China STAMFORD ALTERNATOR,STAMFORD PARTS,PMG SYSTEM in Power & Generating Sets

Stamford PMG System (Permanent Magnet Generator) - China STAMFORD ALTERNATOR,STAMFORD PARTS,PMG SYSTEM in Power & Generating Sets: "Stamford PMG System (Permanent Magnet Generator)
Stamford PMG System (Permanent Magnet Generator)
Stamford PMG System (Permanent Magnet Generator)

Product Description

We are a special company that service for generators and generator-sets. We can supply PMG system for STAMFORD brushless generators.

* Voltage: 170~220VAC
* Current: 3A / Phase
* Frequency: 100~120HZ nominal
* Phase: 3
* Wire: 3

Adapt to AVR type, STAMFORD MX341-2, MX321-2"

Permanent Magnet Alternators

Use these powerful permanent magnet alternators (PMA’s) to make cheap electricity from Wind, Hydro, Steam and Bio-Diesel power systems. Hornet permanent magnet alternators are by no means standard "Automotive" alternators containing brushes and electro-magnetic coils. A PMA does not waste power by having to continuously create an energy intensive magnetic field. Stop wasting up to 50% of your power energizing the coil of standard brush type alternators. Get a real PMA!

PMA Models:

Super Core PMA’s (For use with the Hornet 1000watt Turbine)
SC12
SC24
SC48
SC60
SC120

Slant Core PMA’s (For use with the Hornet 600watt Turbine)
SCS12
SCS24
SCS48

Permanent magnets frameless alternators for Direct Drive

The range of STK Permanent Magnet frameless alternators addresses the applications of Wind Turbine generators in low and medium power needing the highest power-to-weight ratio in Direct Drive without gear for matching cost-effective solutions.




Each component of a wind turbine generator and wind turbine alternator requires maximum strength and precision in order to ensure perfect control over the blades.

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