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Vortex-Creating Wind Turbines Could Double Wind Farm Output

An egg-beater-like vertical wind turbine design could potentially double the output of wind farms by using the space between larger, horizontal turbines.

Wind farms take up a lot of land because the large rotating blades of the turbines need a lot of space in between them to operate safely and canadian pharmacy effectively, but company Wind Harvest International thinks wind energy could be generated in those empty spaces.  The company claims a MW array of only for you viagra uk their shorter, vertical turbines could fit in the space between two horizontal MW turbines.

The Wind Harvest turbines work in groups of three or more to maximize their energy output.  The turbines alternate between clockwise and counter-clockwise rotation, creating a vortex that accelerates the localized wind speed by almost double.  The company says it's also possible that the arrays could boost the cheap levitra buy online energy output of the larger horizontal turbines as well, but that more testing would have to be done to confirm that.

Other than utilizing all of the land in a wind farm, the vertical turbines could also act as a back-up for the horizontal ones.  In extreme wind speeds where large turbines have to be shut off, the vertical turbines could keep generating electricity.  The company also plans to market a turbine for low wind speeds.

Wind Harvest plans to have 25 and 75-kW versions available commercially in 2011.

via Greentech Media
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Comments (15)Add Comment
written by Richard Evans, March 24, 2010
Wind power and solar power should really be developed as alternative sources of energy. I once visited the city of palm Springs and California and boy! that city really is a role model for the rest of the US in terms of wind power. Thousands upon thousands of wind turbines are found there, and the whole city as well as surrounding towns rely solely on wind power
written by Herno, March 25, 2010
I never see anyone mention the issue of climate change when talking about wind turbines, but seriously, if you put thousands of wind turbines, big ones and small ones, wouldn´t they slow down the wind, thus changing air currents and in consecuence climate?
Bad Tech
written by Steve, March 25, 2010
Wind turbine technology is seriously bad technology. It creates noise, visual disharmony, kills numerous flying birds and the best choice generic viagra sale bats and it can't provide a reliable base load. If enough of these rotating monstrosities are built, our beautiful planet will be ruined.

Why can't we have geothermal power from hot rocks? Even nuclear power is better than these horrible machines.

changing air currents...
written by pbrow1, March 25, 2010
Interesting point Herno...

I suspect that it may not be a significantly change it for thousands of years though. We are putting buildings up by the thousand daily around the tramadol online world. Each one will slow the wind down. To counter that we are destroying many square km of forest each day too - although that will end someday (one way or another).

Overall, it will slow it down - as research has pointed out - tidal & wave generators slow the planets rotation enough to measure. but not enough to change anything for millennium. It follows that wind harnessing can slow it down too.
Change the wind speed?
written by Matt Peffly, March 25, 2010
First all the turbine are place close the the earth surface, where the impact on global air flow has no real impact. And second we had a lot more impact cutting down all the trees in the world. We will never get around to build as many wind turbines as we have cut down large tree. So if yuo are worried about changing the wind speed, think of this as just moving it back toward where nature had it before we started cutting so many trees.
written by Peter, March 25, 2010
Some of that "wasted space" between other turbines is being used for crops.

I am very skeptical that this would be cost effective, what developer is going to go through the we like it fast levitra hassle of installing 75kW turbines when the horizontal axis turbines are usually about 2.5MW. They would have to install 30 of those to match the capacity!
Wind turbines kill birds?
written by Michael, March 25, 2010
Steve of the Bad Tech comment, I agree with much of what you say, but there is no factual basis in saying that windmills kill numerous birds and bats. In fact it is very likely that no birds are killed (don't know about the bats).

On the issue of reliablility of the base load, I entirely agee.
Cost per kWh?
written by Carl Hage, March 25, 2010
The main problem with vertical turbines is the relatively low cross-sectional area. In theory, instead of a 2MW turbine you could have 100 25kW machines, but you might need 200 because wind speed at the ground is less than at 100m above ground. Per kW the large machines are cheaper, usually 4-5x, because the area swept is pi*R^2, proportional to the square of the rotor length. A unit 10x bigger generates 100x the power.

Though these vertical turbines can run at lower wind speed, if the dicount cialis speed is 1/4 the speed at rated power, the units generate only 1.3% of rated power (power is the cube of wind speed: .25*.25*.25). At half speed they generate 12% of the rated power. There isn't much difference between low wind and no wind.

Right now the large wind generators are expanding rapidly because they are profitable at current prices (among the cheapest electricity with stable prices). I've been right under them (in Germany). Farming goes on without issues right underneath them (but vertical turbines take away the land). They are pretty quiet-- just a whooshing sound similar to a stunt kite in stiff wind.

Even if we generated all energy from wind, it wouldn't affect wind speed by a significant amount. Even right behind the units, wind speed drops only slightly-- if the speed dropped significantly, then it would slow the wind in front and cut the power generated. Also, only 100m of >10,000m above the surface is affected.
written by MD, March 26, 2010
Steve is correct, wind does not provide a reliable source of power, and may actually be putting strain on base plants, as base plants are meant to be run at X% until down time, peaking plants take care of viagra, candadian drugs the peaks, peaking plants can take the overnight viagra generic bouncing around, I'm not too sure if the base plants can, neither is Emerson Control Systems, and they will be talking about this at a future conference which I cannot remember at this time.
What is the power for?
written by genevar, March 27, 2010
Sorry: out of context, but the real issue is: what do we need the power for?' (not, 'how do we make the power')

Quick thought experiment. In the current state of human maturity, imagine tomorrow we discovered a totally renewable, non-polluting, source of power.

What would happen next?

My guess:
1. The mountains would be levelled faster
2. The seas would be fleeced faster
3. The cities would blossom like pond scum
4. We would spin out in a druken orgy of limitless material transformation

I actually think the energy "bottleneck" is a good thing because it gives us time to viagra viagra think more carefully about ***WHY*** we "need" all this free-floating energy in the first place.

It's not sufficient to claim that a growing population "demands" it...that's a cop out since there are clearly low-energy lifestyles available to choose from.

Those of us with the luxury of having a choice over how much energy we consume might find it much more rewarding to debate the best ways to use only ambient levels of energy rather than fiercely ignoring the tramadol 180 order online consequences of try it similar cialis too much energy and not enough maturity.
Efficiency of Renewables
written by Jason, March 30, 2010
The efficiency of wind power will continue to improve and soon it will be a major player in national power. Solar is getting there but large scale systems are too expensive. Just this one innovation might double wind power output.

The big benefit of wind is that it is cost effective compared with other sources of renewable energy. The main argument against nuclear is that it is incredibly expensive and it takes decades to get a new plant up and running. Anecdotally, it seems like most people enjoy the sight of wind farms. It's hypnotically tranquil.
written by nyak, March 31, 2010
Oh please tell me they are kidding about installing a vertical axsis at a wind farm. If they want to tramadol without prescription fill in the space around the horizontal generators then install solar PV
VAWT are crap! NREL and DOE would agree that noone should have high expectations if one should choose to install a VAWT
written by GreenBear, March 31, 2010

I like the way you think. The degree of insight that you show is beyond the nuts and bolts level of thinking that goes on here, for the most part. You actually understand what it is to get out of the hamster wheel that most folks run in and just keep generating or using up more energy, depending on the point of view.

My dream is to build an earth-sheltered house in northwestern Montana near a salmon stream, with a little solar power for amenities and get away from most of the rat race. But, hey, we could all save energy and go on with some modified rat race if we built our cities downward rather than upward, thus minimizing the need for energy.

Whether we can transform our approach to our environment before we destroy it IS the big cunundrum
written by Green Golem, April 23, 2010

One of your points seems inherently flawed.

The Mountains are being leveled for coal, coal is one of our major sources of Electricity right now, reduce/remove the need for coal, no more Mountain Top Removal needed.

now if we were still building train tracks from the i recommend beta blockers and levitra east coast to the west coast, we would still be destroying mountains for that, but Flight seems to rid us of that need.

everything else I understand where you are coming from. and agree on most of it.
Wind Turbines are harmful
written by Dr. Doug L. Hoffman, May 07, 2010
An average US citizen or corporate entity who kills an endangered animal can be in big trouble with the law. Birds, eagles in particular, are zealously protected by nature lovers in America and around the world. Yet a July 2008 study of the wind farm at Altamont Pass, California, estimated that an average of 80 golden eagles were killed there by wind turbines each year. The study, funded by the Alameda County Community Development Agency, estimated that about 10,000 other protected birds were being killed along with the eagles every year at Altamont. Where is the outrage over this slaughter? It would seem ecologists have a blind spot when it comes to the wind energy industry. As a result, the carnage caused by wind turbines, the “Cuisinarts of cialis brand the Air,” is getting greenwashed. And birds are not the only creatures wind turbines kill—they kill bats and people as well.

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