Making a self-winding 5kW wind turbine

Renewable energies except solar electric or thermal (seeforums dedicated below): wind turbines, energy from the sea, hydraulic and hydroelectricity, biomass, biogas, deep geothermal energy ...
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pluesy
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by pluesy » 28/01/07, 13:10

hello garthos

to find out the dimensions of a wind turbine in relation to its power, I'm going to ladle it in the following way ...

most wind turbines have their rated power expected for a wind of 12 m / s above this speed they do not produce more
a perfect wind turbine would produce for a wind of 12 m / s (about 45kms / h) about 400 w / m2
but as nothing is perfect if the propeller has a 50% efficiency and the alternator 50% also it gives about 100w / m2

for 5000 W ca 50 M2 or a propeller of about 8M in diameter
for a wind turbine with horizontal axis

for a vertical axis I think that these 50 m2 are only valid for one blade so if there are 4 you need 200 m2 of blade
either 7Mx7M blades of unit size for example
and so that it remains light and inexpensive in such dimensions, it is best to use plastic sheeting with fiberglass poles giving the appropriate shape (like a greenhouse in a tunel)
but IMHO it's more complicated to build 4 blades of 50m2 rather than an eight meter diameter propeller ...

otherwise you can always draw inspiration from the characteristics of commercial achievements visible on this link http://www.uqar.uquebec.ca/chaumel/guideeolienACEE.htm
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paotop
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by paotop » 12/02/07, 09:32

for school enthusiasts, there is this personal page:

http://perso.orange.fr/ebonys/

it's a bit of a mess but there's lots of interesting info : Cheesy:
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abyssin3
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by abyssin3 » 26/02/07, 17:54

abyssin3 wrote:By reviewing this wind turbine, I wonder if it would not be possible to make one that has folding blades so that no movement is done in the opposite direction of the wind (= better performance, better speed)
This was done with some water mills which had "baskets" like blades. These were always oriented in the same direction.
It could be interesting for a wind turbine. Anyone see what I mean?


Someone did it recently :P :
http://www.eolprocess.com/start.php

The site is very well done elsewhere.
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Targol
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by Targol » 26/02/07, 18:16

abyssin3 wrote:Someone did it recently :P :
http://www.eolprocess.com/start.php

The site is very well done elsewhere.


I confirm, the presentation is very well done and the concept seems promising ...

Like what, it's good to have notions of sailing : Wink:

Long live the sailors !!!! : Lol:
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by Earthman » 26/02/07, 18:58

Is this story of a wind turbine made with a barrel serious, or is it humor-house? :frown:

(For the moment, I rather have the impression of having fallen into the solar panel.)

((To clarify, I just realized that I was reacting to an old message, which appears at the end of page 1, and whose text says:
"To try to answer your questions.
Here is the way I see this wind turbine and that I plan to start building a prototype very soon.

The blades made with two 200 l barrels cut in half.
Recovery of a complete rear wheel (drum + rocket) from car for scrap.
Solder the rocket on a steel plate vertically and fix the blade support on the drum which is above.
Use a car alternator, the voltage regulation is already done.
Minimum charge a battery and better batteries and empty them thanks to a 12 v DC / 230 v AC converter.
Alternator drum reduction by belt.
The wind turbine is placed on the roof of the house. "

Sorry, I just arrived, I am familiar with the site ... :? ))
Last edited by Earthman the 26 / 02 / 07, 21: 22, 1 edited once.
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david29
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by david29 » 26/02/07, 20:08

PITMIX wrote:Hello
I was wondering if rather than making a wind turbine as Guidi says, I could not recover a centrifugal condenser turbine.
I also found that the Opel alternators provide 100A. What poses problem with the wind turbines when the alternator starts to produce juice, that slows down the wind turbine enormously. In the end you need a gigantic fan.
I saw a TV program on a new type of centrifugal wind turbine identical to Guidi's idea.
I can't remember which show it was.
I searched the net and I can't find anything. These are not horizontal wind turbines.


Hello go see on mumule there is a guy who provided the plans of a chrysler alternator traveling transform into a wind turbine, after qlq modifications of course!

Kénavo
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Cuicui
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by Cuicui » 26/02/07, 20:36

abyssin3 wrote:Someone did it recently :P :
http://www.eolprocess.com/start.php the site is very well done elsewhere.

Awesome !!! :P :P :P
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delnoram
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by delnoram » 26/02/07, 21:55

abyssin3 wrote:Someone did it recently :P :
http://www.eolprocess.com/start.php the site is very well done elsewhere.


It's strange, it reminds me of the inventor who was featured on the M6 ​​show "inventor of the year" and that we have not seen again :|

in any case, the wind turbine looks wildly like the speech.
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by I Citro » 26/02/07, 22:31

Bolt wrote:there was one at the invention of the year competition on M6, its blades were ordered to rotate and avoid the wind

but the guy didn't understand how a wind turbine works horizontal axis : he said that the air passing between the 3 pale "fines" did not produce useful recoverable energy (to enhance his invention), that was the thing not to say : Evil: because big bullshit

bolt


It is also one of the arguments of:
http://www.eolprocess.com/start.php the site is very well done elsewhere.

Could you explain to us why, bolt? :?: :?: :?:
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abyssin3
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by abyssin3 » 27/02/07, 00:50

They really have a sense of practicality, in chapter 21 - supermarket ( http://www.eolprocess.com/start.php ), the blades can be used as advertising signs.
If someone has "econology" posters, we can always try to decorate their blades ... : Cheesy:
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