Choose solar collectors: plans or vacuum tubes?

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Christophe
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by Christophe » 18/03/08, 17:58

citro wrote:Normally absorbers have very low thickness (less than 5 / 10e mm). :?


Here is where I was going.

Cuicui we doubt that you not have a rolling mill but it could pose problem.

Have you (looping and you) the new ESE?

If I can call them if you like?
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loop
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by loop » 18/03/08, 21:59

Bonsoir

No news from ESE, I suspected a little :frown:

I do not know if this company deigns to work with individuals, nothing is stated on their website about it, and also no price!

Christophe, it's your turn, of course with diplomacy : Mrgreen:

For the comparison between plan and tube sensor technology (see link at the beginning of this topic), the test conditions are a little challenged by some forumheat-to-earth

But soon the vacuum level sensor :!: : Cheesy: to get everyone to agree

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by loop » 18/03/08, 22:23

I figured planted

The comments on the measurements are on the forum from Apper

http://forum.apper-solaire.org/viewsujet.php?t=2131

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by Christophe » 18/03/08, 22:41

loop wrote:Christophe, it's your turn, of course with diplomacy : Mrgreen:


Me not a diplomat? Roh veiled thank you John ... great reputation ... but schkrogneugneu ... Not!

Okay, I'm trying to call them tomorrow! I would ask them in passing if it was they who could have made the signs for our (sorry "our" ...) shack! (that will already make an introduction).

loop wrote:For the comparison between plan and tube sensor technology (see link at the beginning of this topic), the test conditions are a little challenged by some forumheat-to-earth


A good solar panel is a panel that pays for itself as soon as possible (éconologiquement speaking of course) and holding as long as possible with minimal maintenance... Point bar

Then empty as coming from China is already a bad point. Same, a sign that in 92% yield may hold less than lontemps road map of 75% ...

Ever seen a formula to 1 10 000km? Well it's the same with solar panels ...

loop wrote:But soon the vacuum level sensor :!: : Cheesy: to get everyone to agree

A+


Oh yes ! A vacuum sensor plane with 5 cm ca glass thickness must walk well sayest : Cheesy: : Cheesy:
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by Christophe » 18/03/08, 22:50

loop wrote:I figured planted

The comments on the measurements are on the forum from Apper


One click and look for well summarize and confirm what I just said (ESE VS Chinese Tubes map):

To read the test, I regret having bought all my tubes on the other side of the earth, then ESE is built 40 km from home. How is it ESE is not included on the test solarenergy.ch


Again returning ESE (decidedly!) ...

Additionally it is imperative that testers take into account also the DURABILITY in their tests !! An instantaneous measurement is certainly interesting but largely incomplete for system supposed to be amortized over several years ... see 15 years for the more expensive systems!

And again: the panel is not everything.

A COP or better solar COPA should also be defined ...
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by I Citro » 23/03/08, 23:34

Christophe wrote:
loop wrote:But soon the vacuum level sensor :!: : Cheesy: to get everyone to agree

A+


Oh yes ! A vacuum sensor plane with 5 cm ca glass thickness must walk well sayest : Cheesy: : Cheesy:


If it were possible, the air space of a double glazing would have been "filled" with vacuum for a long time ... : Lol: : Lol:
In addition to the vacuum that is cheap, certainly less than argon ... :?
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by loop » 28/03/08, 12:40

Hello

A solar panels manufacturer of sensors found this solution, between tubes and Plans

So the mockers!

It did not look that bad, but I do not read German

http://www.solarfocus.at/html/cpc_technik.html

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by Philippe Schutt » 28/03/08, 19:00

Bingo!

How is the gain of the evacuated tube panels?

1. The concentration of radiation to increase the T ° fluid during periods of low sunlight. No need for that tube, a stainless steel or polished aluminum, folded in the shape does the same job for much less. The tin can also 8) as was well noted Cuicui, or a cast-coated foil

2. improved insulation tube through the vacuum to keep warm in cold weather. can be replaced by tempered glass Plexiglas, less conductive, and may also be evacuated. indeed, plexi is supported by each edge of the reflector, it can not be deformed. There remains the question of the sealing device that should be feasible and it is conceivable to provide the panel with a vacuum pump jack.

The self of such panels would be technically more affordable than flat panels.
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by Capt_Maloche » 28/03/08, 19:46

pleeaase sketches, it seems silly
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by Philippe Schutt » 28/03/08, 21:43

sketch? but it is the looping link. it's pretty clear, even without speaking German.
The ideal would still be able to affanchir of the tongue under the tube, changing the shape of the reflector. Moreover, to reduce the variation of the angle of illumination 45 ° instead of 180 °, one could start by putting the tubes to the horizontal, the panels being perpendicular to the worst azimuth.
Then a parabolic shape instead of circular focus all rays on the tube itself.
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