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New Technique for Low-Velocity Wind Turbines

One of buy levitra low price the biggest problems with typical horizontal-axis wind turbines (HAWT - pinwheel-type turbines) is that they are not very efficient at low wind speeds. This is usually dealt with by surveying sites and finding locations where wind speeds tend to be higher, so that the turbines will be more effective once they are built, but these locations are often in remote locations, far from where the power is needed.

Wind turbines that use ducts to direct the wind for greater efficiency are not an entirely new idea, but the visit web site buy discount cialis online developers of the Winga have a new approach that could make this a useful configuration for new wind turbines.

By using wings to shroud both the inlet and the outlet to the turbine, it is possible for the turbine to generate power with lower wind speeds. The Winga turbine could be located closer to the ground, so that it would be less visually obtrusive, and also makes maintenance easier to we choice buy levitra pill carry out. The Winga can also be configured so that it could be lowered to the ground in the event of excessive winds that had the potential to cause damage.

The Winga has a cut-in speed (where the turbine first begins to generate power) of just 2 meters per second (about 4.5 mph) wind speed and reaches full power at a wind speed of 4 meters per second (about 9 mph). A typical HAWT has a cut-in speed of 4 meters per second, and doesn't reach full power until the the best site generic cialis sale winds reach 10 meters per second (about 22 mph).

The compact configuration of this turbine also allows it to use an annular rotor instead of the more conventional central-axis blades, which concentrates the blade area at the edges, where the greatest amount of torque is developed. The Winga has a tower height of only today canada generic levitra 35 meters (about 115 feet), and measures 36.5 meters (120 feet) in length, with a scoop opening measuring 9 meters by 12 meters (30 feet by 40 feet). All of the moving parts are contained within the enclosure, so it would not have the dynamic, moving appearance that some find bothersome with conventional turbines.

The lower height of the Winga could be a disadvantage in some respects, since faster, more consistent winds are found at higher elevations above the ground. But the ability to produce power at a lower wind speed, and the likelihood that it can produce power more consistently, could overcome that disadvantage. Steering the large scoop into the wind when the winds are swirling and less steadily coming from a single direction might also be difficult and could also lead to inefficiencies. But the possibilities offered by the Winga are interesting, and further development could be worth watching.

link: Winga E-Generator

HatTip to: @johnrobb

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Comments (7)Add Comment
written by Michael Okrent, March 30, 2012
With all that area on top, might consider adding some solar panels to power the movement into the wind, at least when the sun is out.
add to skyscrapers
written by Andrew Meadows, March 30, 2012
Put one of these shrouds on a rotating platform with a small flow-design turbine inside and an auto-wind-vane mechanism outside, and then put that on top of a big skyscraper and you'd have a nice little power plant in high-altitude winds.

The ducts remind me of wind tunnel designs. Big openings gradually reduce to narrow pathways to produce very fast laminar air flow.

Also, who hasn't experienced a door slamming because low pressure gradients across two sides of a house with open windows are focused through a single partially open doorway? In such a case very low velocity outside winds can make the door slam very hard.
written by ecolife, April 02, 2012
Nobody have more info about?
How would this look if nature designed it?
written by Mark Bachelder, April 05, 2012
The image here is canadian rx levitra ugly and cialis online without prescription un-intuitive in design. Great concept though - this tops out where other turbines only just kick in.
Nature would never produce a design as ugly and fragile as this. Rounded corners, and curving tapers on 5mg viagra the ducts would be more sightly, and more durable, and more effective - presenting less surface area and less friction. It might be desirable to start the wind to turning within the duct, as twisting fluids flow faster.
Location, Location, Location!
written by DJ, April 06, 2012
Why are all these folks obsessed with putting the turbines on tall towers and skyscrapers? Have you ever walked out of a business in a major city and had the wind from the street knock you over and destroy your hairstyle? Make the low velocity turbines smaller and artistic. Then plant them all over downtown Miami at street level!
written by DAN, April 07, 2012
it could posibly have a great performance at low wind rates but its fragility makes them unsafe as a loose roof and unstable as a kite , I certainly prefer to cheap viagra alternative submerge a turbine and cheap discount levitra use the tidalenergy , or in a riverflow wich will be clearly as expensive as this type of only for you info cialis technology,

Think about it , it is better to find a site for a 22mph HAWT and its 50% safer than these lowvwlocity wind turbines.

Put them above a freeway!
written by John, April 11, 2012
Put them above freeways, at a somewhat upward tilting angle, to capture both the breeze caused by traffic, and the rising thermal air current from the hot pavement.

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