Solar parables in autoconstruction

Solar thermal energy in all its forms: solar heating, hot water, choosing a solar collector, solar concentration, ovens and solar cookers, solar energy storage by heat buffer, solar pool, air conditioning and solar cold ..
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chrisleblay
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by chrisleblay » 30/12/08, 21:08

Well seen !
I have not thought about it (I still speak almost in English), the next time I will try to find a document in French but honestly there is not much in French.

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Hasardine
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by Hasardine » 30/12/08, 21:24

as for me I speak fluently Alsatian, but I do not have the chance to find technical or scientific documents in Alsatian !!! LOL !!!
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by Christophe » 31/12/08, 00:11

Do like me Hasardine: look at the pictures and diagrams Image

Otherwise speaking of Halsache, what do you think of that: https://www.econologie.com/forums/gare-de-st ... t6797.html

Without laughing, the .pdf you just found for us Chris is excellent! Image There is even the "turbine" part!

I put it in the downloads of the site quickly and I keep it under the elbow for this summer!

It's still sad the difference between a PFE of a French and American engineer ... (Master of Science = dipl. Ing. In the USA I think)
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Hasardine
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by Hasardine » 31/12/08, 12:13

Regarding Strasbourg station, I do not like, and I did not like the previous one, because the floor was glazed, and when you feel dizzy, you get these anxiety attacks (I do not not talk about the glass elevator !!!!) short, I banged regularly to go around! I still want to clarify that in my entourage, I was not the only one to do so!

for the docs, it is precisely the turbine part which is super interesting, and to which, me, I do not capture much!
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by e-conologue » 23/01/09, 11:10

I made a system that follows the soliel for a PV panel. It is also inspired by the redrock site using green LEDs as light detectors.

The mechanics were lighter than the one presented here since it only turns a panel.

It seems to me that there should be more reduction in order to use a small engine. I have a total reduction of approx. 800: 1, the motor is tiny and consumes only between 10 and 20 mW: that slab.

Here is a discussion with link on an animation then the control circuit.

http://flegon.info/forum/viewsujet.php?p=1717#1717
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chrisleblay
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by chrisleblay » 28/03/09, 02:50

Some updates:
On this 30 second video I mounted the 1 meter dish on a rail.
It advances by an electric car with a tiny 12 volt motor thanks to the little friction of the rail constructed from a thin metal bar found at a DIY store.
To date I have not found it more simple and economical as a rotation system.



Image

Image

Tests today by 3C outside, the water from the kettle (about 20 cl) is in the form of vapor in about 3-4 minutes through the 1m TV dish built from broken mirrors found in the street.
During the very first test, I was also impressed by the focus of the rays. The focal spot was only 3-4 cm, however it was perhaps a fluke, the dish was surely very well positioned relative to the sun.

To contiue
Thank you for your econologist intervention in this post your link is informative.

Chris
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by Christophe » 28/03/09, 11:34

For those, like me, who want to start building a parable, here is a summary message, from the forum of Edgar Nazar solar towers

Christophe wrote:Ok Remundo, Obelix superb link makes you want to build!

Image
Image
Image

He could put a little stirling without problem!

So I recap:
http://f5dm.club.fr/geodesic/index.html
+ http://canarlake.org/index.cgi?theme=fo ... geodesique
= everything to do his parable even!


A little trick found on the 2ieme link (would not be Auvergnat the author : Mrgreen: :

But it still costs all these cleats!

You noticed, too? A cleat is not expensive. But if you want a mesh of 8 x 8, so 2 times 9 cleats, it is immediately think ...

So thinking, you think you have better buy a plywood plate, and cut thin strips parallel in, as a cleat. I think you're right!
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chrisleblay
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by chrisleblay » 29/03/09, 14:08

Hello,

They are well these photos of assembly of large parable.
Yesterday I experimented with the dish just placed horizontally and saw nose to have the same power as positioned in front of the sun you have to multiply the size by a factor of 2, but when you think about it it's nothing, it makes a paraole of 2m diameter flat.
The hearth does not move much, just follow it. I will continue to watch its position from survey to sunset.
I wonder if the focal height from the horizontal is always the same? (I think so, but I have to confirm)
the horizontal position it varies a little but as I say very little.
I will continue to measure.
Finally if someone has info on it it would enrich the subject.

A+
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chrisleblay
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by chrisleblay » 20/04/09, 13:11

This photo is in my opinion the crucial point to make a solar parabola. The rail is essential to the life of the dish because it will allow it to be rotated manually for testing and then automatically with light motors.
This rail is extremely simple to make (like cm1cm2.free.fr) a long very thin metal bar and angles which are found in all DIY stores. To draw the circle, simply rotate a pencil on the wood.

Image


Image
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Obelix
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by Obelix » 20/04/09, 13:57

Hello,

And for those who don't have the right tools, or who don't have the right motivation:

http://www.handicap-3000.com/disque-tou ... 68e6c1f0e8

For thirty euros the "trick" done! Supports 130 Kg!

Obelix
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