Vertical Axis Wind Generators - Page 2

sluissa · 20-03-2006, 21:30

I won't pretend I understand all of that, and I read the first file but I only skimmed the second file, but I still don't see that the darrieus generator is all that less efficient than any of the other types.

I may be reading the chart and the book wrong though, so I'll just drop the subject.

Thanks for the reading material though.

CaptainK · 21-03-2006, 10:03

No problem Rick.

At least you tried looking for it. At least it was a good thought!!

Alan Wheeler · 21-03-2006, 12:35

Here's a verticle axis windgeny for boat use.
http://www.decel.co.uk/default.asp?categoryID=2
Personaly, I don't know why more haven't followed the idea of verticle axis. It gives a far greater blade surface area, which equals power, plus in a smaller space.
I played with verticle axis generators in an engineering company nearly 30yrs (ouch) ago. We used them to lift water to cattle troughs on farms. It was totaly mechanical, No electrical generation. They worked very well.

Talbot · 21-03-2006, 16:27

Wheels, I have talked to people with vert axis gennies similar to the type in your link, and they reckoned that they were about as useful as a f@rt in a thunderstorm.

Alan Wheeler · 21-03-2006, 22:41

I like that, Imust remember it.
In knew I shouda added I knew nothing about those forgens.
So what were complaints based around. Are the things too small or what??

Talbot · 22-03-2006, 03:53

IIRC they are only sold as trickle -feed, but most people reckoned that the trickle was a vast overstatement.

Brent Swain · 19-05-2006, 12:55

I tried that once, with thin walled , half aluminium tubes radiating outward , anemometer style. It was grosly innefficient. I went for a srtandard wooden propellor which was light years more efficient. That was 17 years ago and I'm still using it.
Brent

defjef · 19-05-2006, 16:41

I have seen caps on vertical ventialtion shafts which seem to have blades and "free wheel" regardless of the direction of the wind. The blades on one side "scoop" the moving air forcing it to spin and the opposite side the wind is deflected.

I don't see why a tall vertical shaft with vanes couldn't be used to spin much like the prop types of horizontal wind generators... and drive the alternator or whatever generators the electricity.

Perhaps the blade area needs to be sufficiently large to drive the altenator and overcome the resistance. Not an engineer so I can't show this would work... but intuitively it seems it could.

No?

Je
sv Shiva
Contest 36s

21-03-2006, 10:03	#2
CaptainK Registered User Join Date: Sep 2005 Location: Phoenix, Arizona... USA Posts: 2,387	No problem Rick. At least you tried looking for it. At least it was a good thought!! __________________ CaptainK BMYC "Those who desire to give up Freedom in order to gain security, will not have, nor do they deserve, either one." - Benjamin Franklin

21-03-2006, 12:35	#3
Alan Wheeler Registered User Join Date: Dec 2003 Location: Marlborough Sounds. New Zealand Boat: Hartley Tahitian 45ft. Leisure Lady Posts: 8,042	Here's a verticle axis windgeny for boat use. http://www.decel.co.uk/default.asp?categoryID=2 Personaly, I don't know why more haven't followed the idea of verticle axis. It gives a far greater blade surface area, which equals power, plus in a smaller space. I played with verticle axis generators in an engineering company nearly 30yrs (ouch) ago. We used them to lift water to cattle troughs on farms. It was totaly mechanical, No electrical generation. They worked very well. __________________ Wheels For God so loved the world..........He didn't send a committee.

21-03-2006, 16:27	#4
Talbot Registered User Join Date: Jun 2004 Location: Stavanger, Norway Boat: Last boat was a Catalac 9m Hi-Jude Posts: 2,905	Wheels, I have talked to people with vert axis gennies similar to the type in your link, and they reckoned that they were about as useful as a f@rt in a thunderstorm. __________________ "Be wary of strong drink. It can make you shoot at tax collectors - and miss." Robert A Heinlein

21-03-2006, 22:41	#5
Alan Wheeler Registered User Join Date: Dec 2003 Location: Marlborough Sounds. New Zealand Boat: Hartley Tahitian 45ft. Leisure Lady Posts: 8,042	I like that, Imust remember it. In knew I shouda added I knew nothing about those forgens. So what were complaints based around. Are the things too small or what?? __________________ Wheels For God so loved the world..........He didn't send a committee.

22-03-2006, 03:53	#6
Talbot Registered User Join Date: Jun 2004 Location: Stavanger, Norway Boat: Last boat was a Catalac 9m Hi-Jude Posts: 2,905	IIRC they are only sold as trickle -feed, but most people reckoned that the trickle was a vast overstatement. __________________ "Be wary of strong drink. It can make you shoot at tax collectors - and miss." Robert A Heinlein

20-03-2006, 21:30	#1
sluissa Registered User Join Date: Mar 2006 Location: Pensacola, FL, US Boat: Westfield UK Kingfisher 20+ - Rabbit Posts: 402	I won't pretend I understand all of that, and I read the first file but I only skimmed the second file, but I still don't see that the darrieus generator is all that less efficient than any of the other types. I may be reading the chart and the book wrong though, so I'll just drop the subject. Thanks for the reading material though.

19-05-2006, 12:55	#7
Brent Swain Registered User Join Date: Mar 2004 Posts: 620	Vertical axis wind generator I tried that once, with thin walled , half aluminium tubes radiating outward , anemometer style. It was grosly innefficient. I went for a srtandard wooden propellor which was light years more efficient. That was 17 years ago and I'm still using it. Brent __________________ Brent Swain

19-05-2006, 16:41	#8
defjef Registered User Join Date: Apr 2006 Location: up from NYC Boat: Shiva - Contest 36s Posts: 1,877	Ventialtors I have seen caps on vertical ventialtion shafts which seem to have blades and "free wheel" regardless of the direction of the wind. The blades on one side "scoop" the moving air forcing it to spin and the opposite side the wind is deflected. I don't see why a tall vertical shaft with vanes couldn't be used to spin much like the prop types of horizontal wind generators... and drive the alternator or whatever generators the electricity. Perhaps the blade area needs to be sufficiently large to drive the altenator and overcome the resistance. Not an engineer so I can't show this would work... but intuitively it seems it could. No? Je sv Shiva Contest 36s

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