Wind Turbine Vertical at the SBE, Nottingham. there are trees nearby and a taller building adjacent. The horizontal anenometer is swivelling around like mad. Even the horizontal turbine on the tower nearby is unable to hold a good angle.

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Some improptu video of very early design testing of a half-scale impeller model under unfavorable wind conditions. Site has low average wind speeds (less than 5mph; strongest recorded gust 17 mph) and experiences extreme turbulence. Site is actually 12 feet lower than the nearest obstructions (to the north & east). So, this is was a good test for developing usable torque under far from ideal conditions. Dorje Inc is currently developing other impeller designs for medium to high wind conditions. We feel strongly that the impeller should match the site conditions for our installations. Why vertical axis wind turbines (VAWT)? We have many reasons for this choice; some are engineering and performance based, others are ecologically based. VAWT designs are very tolerant of turbulence, and therefore are suited for rooftop installations or other less ideal conditions. They are easier to brake and apply maglev technology to (floating magnetic bearings for axial loads). Also, the design is inherently omnidirectional. Even abrupt changes in wind direction don’t matter at all. But primarly — from an engineering standpoint — VAWT turbines are high-torque, low-RPM systems. Horizontal wind turbines (propeller or fan-blade types) are low-torque and high-RPM systems. With the proper gearing, we can get a lot more power production out of a VAWT system without needing ideal conditions. Horizontals are very finicky about their wind, and an ideal installation places them 30 feet ABOVE the …

www.Regenedyne.com Demo CGI for proposed 2GW Magnetic Leviatated wind Turbine. *Efficient Frictionless Power Generation with less maintenance, compared to HAWT. No oil change or replacement of the bearings, gears. Since, MAGLEV does NOT require such. ** Current bearing technology has forced wind turbine designers into horizontal spindle three bladed wind turbines. In this design the huge blades are connected to a spindle in the center. The bearings that support the spindle and control the pitch of the blades (which can be hundreds of feet long) see huge pitch-moment loading, some of which is manifest as torque energy that is focused through the center spindle. The target speed for the spindle is 18 or 20 rpm and the bearings holding the spindle are mounted in a huge casting which also contains a large gearbox stepping the speed up to 1800 to 2000 RPMs which allows for the proper surface speed relationship between the coils and magnets. It is necessary to invert or condition the current, which is expensive. This gearbox is full of many large bearings, gears and castings; for a 2 MW turbine the gearbox can easily weigh 30 tons. This gearbox needs to be mounted on the top of a pole more than 150 feet in the air and be able to support the turbine blades under full-force wind conditions. ***MAGLEV Power Generation, the pitch moment ratio is closer to 1-to-1 then the 100-to-1 as with a horizontal spindle design.

VP100 Vertical Axis Wind Turbine Prototype Spinning at Clines Corners, New Mexico May 2007. Capable of generating 150 – 300 mwh of annual energy at good wind sites. vawtpower Management, Inc. See our web log at vawtpower.blogspot.com

Combo Rotor Vertical Axis Wind Turbine System Range from 400W to 3KW. Features: 1. Less Noise and good for Household application 2. Ease to start up at light wind: 2.5 m/s 3. Good Power Output (33% Capacity Performance with MPPT Power Controller) 4. Day-n-Night , 24 hours a day for 15 service years 5. Safe and Bird-hitting free 6. Small Space (within 1 square meter) for Installation 7. Less Turbulence problem For details, please contact: eric@digitalhomeshop.net

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EnergyForEarth.net – How To Make Vertical Axis Wind Turbine These plans are for the construction of vertical axis wind turbine, modelled after a … the wind speed, so to make practical use of it, you must be able to … www.re-energy.ca – Similar – 2. HOW-TO: Make A Vertical-axis Wind Turbine For 0 – Ecofriend HOW-TO: Make a vertical-axis wind turbine for 0. Anupam | Jul 30 2007. Sponsored Links. wind turbine. Wind energy is one of the most renewable sources of … www.ecofriend.org …

EnergyForEarth.net – DIY Vertical Axis Wind Turbine DIY Vertical Axis Wind Turbine (Video) TreeHugger Jun 13, 2009 … Build Your Own Vertical Axis Wind Turbine Ahh – Green Power Science. It’s a while since I checked in on husband-and-wife team Dan and Denise … www.treehugger.com/…/diy-vertical-axis-wind-turbine.php – Cached – Similar – 2. DIY vertical axis wind turbine – Hack a Day This vertical axis wind turbine (VAWT) uses five 3 PVC pipes cut in half for blades rotating on three kids …