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Forum Index : Windmills : Advice needed PLease

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brett

Newbie

Joined: 08/02/2006
Location: Australia
Posts: 39

Posted: 01:51am 14 Jan 2009

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Hi People
I have been playing around with wind power for a few years and build a few, enough to know my place is windy.
I plan to install a wind generator and grid connect it, but have decided to buy one instead of making it myself.

I can get a 2kw vertical turbine for about $8500 which includes Inverter and controler.
Attached are the specs and a picture.
What do you think?
Originally I was going to install a 1kw Whisper, but this looks better value.

Regards Brett

wdyasq

Newbie

Joined: 29/07/2008
Location: United States
Posts: 21

Posted: 07:55pm 14 Jan 2009

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Looks like they beat the Betz limit to me .... But it is common for advertising copy to exceed theoretical and possible.

From the handy IRC BOT calculator using equivalent to 2m X 3m area (2kW unit)

3664.5 watts possible from 2.8 m dia prop (6.0 m^2) in 36 km/Hr wind (density of 1.225000) 586.3 watts output assuming generator is 80% efficient and Cp of 0.20

"Does it come with lubricant?"

Ron

Adventure is just bad planning." -- Roald Amundsen

vawtman

Senior Member

Joined: 14/09/2006
Location: United States
Posts: 146

Posted: 11:45pm 14 Jan 2009

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Hi Brett,
Do you have link to the company?Is it chinese?

Before you buy, it would be good advice to visit their showroom(if any) if possible and see it in action..The blades seem to be well supported.

If it's from China, just copy it but make it stronger

Not sure of your gridtie requirements down there.

GWatPE

Senior Member

Joined: 01/09/2006
Location: Australia
Posts: 2127

Posted: 01:46am 15 Jan 2009

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The graph presented is close to just the wind energy per unit wind capture area. We all know that how much energy harvested by an alternator may only be a small fraction of this in reality.

Gordon.

become more energy aware

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