vertical wind turbines

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vertical wind turbines

Postby paul_celia » Sun Oct 18, 2009 1:59 pm

Hi My Name is Paul

I have recently installed a 1Kw solar panel system and want to put on a wind turbine as well the one i'm particularly interested in is one that I have seen on the internet. Which is like the whirly bird cooling fan
it is rated at 300W and is sold by a company in china.

I found it whilst webb brousing it is distribuited by a company called alibaba

web address http://www.alibaba.com

Any body know anything about these units for or against if you want more info on what i've discribed please contact me either through this coloum or on my e-mail address paul_celia@live.com.au

thank in advance
Last edited by paul_celia on Sun Oct 18, 2009 2:17 pm, edited 1 time in total.
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Re: vertical wind turbines

Postby munter » Mon Oct 19, 2009 12:10 pm

AFAIK alibaba is a good portal rather than an actual distributor. I think Alibaba works to connect buyers and sellers at a business to business level rather than at retail though you may be able to buy from some of their advertisers in a retail fashion as well.

VAWTs seem to suffer from relatively low power output relative to HAWTs. Its a shame as their ability to deal with turbulent and changing winds would seem to make them ideal for residential use. I can offer no advice on the suitability of one versus another except to say that you would want to be careful about the assumed wind speeds when comparing power outputs for wind turbines to make sure that you're not later dissapointed by low electricity production.
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Re: vertical wind turbines

Postby SR76 » Wed Oct 21, 2009 10:00 am

Maybe just a general warning that small wind turbines in urban areas seldom fulfil their promise. Partly because of the high turbulence in built-up areas, partly because wind speed distribution is not well understood by buyers and not well communicated by sellers. A 300W turbine might be very lucky to produce 300W 1-2% of the time, and energy output certainly won't be 300W * 24h.

For a turbine to work in urban areas you'll need an exceptionally windy site or a very tall tower.

I'm not convinced that small VAWTs overcome the fundamental problems with small HAWTs.

Big wind = awesome.

http://www.reuk.co.uk/Consumers-Disappo ... rbines.htm
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Re: vertical wind turbines

Postby scar59 » Tue Oct 27, 2009 8:23 pm

Hi about your VAWT I would not be using such a small unit 300W is not a lot of power, and as someone has already said it won't be spinning constantly for 24 Hrs. I would be looking at a 1Kw size unit to give somewhere near what it takes to light MORE than a couple of light bulbs. The brits are making a very good VAWT under the brand-name QuietRevolutions, these were develloped for urban areas. Look them up on the Web, they are expensive but I think a home-built unit on their design would work well. Scott.
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Re: vertical wind turbines

Postby KarenS » Sun Nov 01, 2009 6:08 pm

NOTE. This post has been tranferred from another thread, rather than duplicate the discussion.

scar59 wrote:Why is no-one in Australia talking about small VAWT use in urban areas for power generation. In england in particular, One company has develloped very quiet turbines for peoples backyards. Scott

Currently it isn't an issue in Melbourne, as some recent surveys (and sorry, I cannot remember/find the references, but I'm sure someone here will do it quick smart!), purport to show that there isn't anywhere within 25km of the Melbourne CBD where there is sufficient wind to make small/residential wind generation viable!!

Turbulence is also a chronic problem in built-up areas, and I know VAWTs are better at turbulence than other
WTs, but if there ain't no wind, then it doesn't matter very much ...

I've seen a couple of houses with those VAWTs on 'Grand Designs" - looked interesting, and maybe if they get a bit cheaper, the equation could come out differently.

Also remember that in Melbourne at least, all the palaver you may have seen here and elsewhere regarding feed-in tariffs etc for PV systems will also apply to wind generated power - the distributors just refer to ANY electricity generated by small users, whether it be PV systems, wind, mini-hydro, or your exercise bike or pet pony harnessed to a gennie.
And with the 60c (ex GST) FiT just gazetted to start on 1 November, and retailers being obliged to put tariffs on their websites, and I think, give a month's notice of alterations (although I got no notification of any sort, and I also read the paper daily, the last time my retailer gouged another 2/6 out of us miserable consumers), you may find people in Melbourne are playing a waiting game.

But there are other urban areas in Australia, and if the prices of the UK VAWTs are coming down, maybe you should crank up some awareness!! Anyone you know importing/installing them yet??
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Re: vertical wind turbines

Postby KarenS » Sun Nov 01, 2009 9:12 pm

Another transferred post ...

Re: VAWT for urban use.

Postby KarenS » Sun Nov 01, 2009 10:09 pm

Hi scar59,

Before you go spending your hard-earned cash, I'd have a good go at finding out about the wind situation where you intend to put the VAWT, ie, where you live. And then compare with the specs of the UK turbines.

I see you're in Newcastle - the Bureau of Met, or perhaps someone at Uni Newcastle (do they teach any met subjects in Science, or physics, or geography??) might be a place to start. You need to get some general idea of how much wind you get, and when/how often, and if for some reason you think your house is way different from where the BoM recording station is, then maybe you need to get an anemometer, with some way of recording it's measurements, and see whether it's all going to be worthwhile! It's a long time since I've been to Newcastle, but if you're anywhere near a cliff top, facing the ocean, you might get enough wind. If you're inland, down in a ditch, look for some other project, LOL.

If you are a serious DIY person, and can do electronics too, there is a recipe at http://www.infidigm.net/projects/windmeter/
This is Canadian, I think, or US - anyway, it's all in imperial or US units, so you'll need the old tools, or a kid with a calculator to do all the conversions.

Another good-looking site, although again, north american, is: http://www.builditsolar.com/Projects/Wind/wind.htm and have a good rummage!!!!

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Re: vertical wind turbines

Postby Tracker » Mon Nov 02, 2009 10:08 am

http://www.quietrevolution.co.uk/projects.htm

Are these the ones you have seen in Melb, Karen?


http://www.quietrevolution.co.uk/about_small_wind.htm

Using real wind data, our modelling shows that QR produces 20% - 40% more energy than a conventional similar sized-HAWT (Horizontal Axis Wind Turbine) in a typical location near buildings, where the wind is turbulent.
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Re: vertical (axis) wind turbines

Postby Gordon-Loomberah » Mon Nov 02, 2009 11:23 am

[quote = QR]Using real wind data, our modelling shows that QR produces 20% - 40% more energy than a conventional similar sized-HAWT (Horizontal Axis Wind Turbine) in a typical location near buildings, where the wind is turbulent.[/quote]

The only problem with that comparison is that no one in their right mind would locate a WTG in turbulent air near a building, if they really wanted decent wind power! Turbulent air means a WTG will produce very little compared to non-turbulent air, so 20-40% more of not very much, is still not very much power. Turbulent air also places more stress on all the main components of a turbine, which can lead to premature failure. You really dont want a WTG doing 400rpm to fail right next to your house.
HAWTs need to be on tall towers, well above any nearby obstructions, and preferably 20 or more times the obstruction's height away to ensure non-turbulent wind. IE, almost nowhere in a town or city will be suitable. Even if it was, the local council would probably stop you installing one.

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Re: vertical wind turbines

Postby KarenS » Tue Nov 03, 2009 5:31 pm

[quote="Tracker"]http://www.quietrevolution.co.uk/projects.htm

Are these the ones you have seen in Melb, Karen?

Sorry, didn't say I'd seen any in melbourne. The first picture is of the ANZ new place in Docklands, just beside the CBD. Very Posh area, never been there. Flat as a tack, and probably reasonably windy, as it's on the edge of the water. Many big businesses are moving their head offices or state offices down there.
Actually, the only VAWTs I've seen are in the TV series Grand Designs, on some houss in Lndon, but they didn't look like these ones either, sorry.
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Re: vertical wind turbines

Postby Percul8or » Sat Nov 14, 2009 7:52 am

Hi all,
I was very interested in adding wind to my solar so I did a lot of research and imported a few units. After a few duds I found a unit that worked very well. I now have two on my roof in Crows Nest NSW. I get .5 to .8 kWh on an average day from each turbine and 1kWh plus on good days.
I liked them so much I am now importing them. We hope to have a VAWT 300 Watt unit by the end of the year. It is currently being developed.

Drop me a line if you want any further info
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