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solardan1959

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Reply with quote  #41 
Peter,
The upside down fins was more for the flow than to absorb the sun but maybe it will present better that way. 

Flash,
No real need to move since you originally talking about Morris's finned collector any way. I saw talk of hijacking so thought the thread had drifted from the original but we are all still talking about the same thing.  I'm thinking we should have a thread on louvered panels in the hot air section but the overall interest is not that high anyway.

[image] 
I think the second may not be that bad, recently talked about in reference to the Cansolar collector, but the more angled one would lose half the suns reflection as a good portion of it will bounce at that angle.

Dan

FlashTec

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Reply with quote  #42 
Ok :-)

Remember that I said this pictures is not proportional in any way. The third one was supposed to have about the same radius on its glazing as the second one just more. But maybe that doesn't matter. I never worked with solar in any way I just love to make up ideas :-)
Garage_Hermit

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Reply with quote  #43 
Must admit, I like that third model, Big Curve [smile]
However, I would defer to Dan's opinion about the bouncy light
*UNLESS*, that is, one used *corrugated* glazing...

I am (obviously...) thinking of my FlowTube
http://www.simplysolar.supporttopics.com/post/introducing-the-flow-tube-collector-7067827
(with which I have not gotten very far...)

G_H

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FlashTec

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Reply with quote  #44 
Would twin-wall polycarbonate sheet count as corrugated enough or do you mean the kind of corrugated sheet often used as roof?

I guess with some heavy work even the "roof" model of corrugated sheets could be used in a double layer. Guess it would maybe work as a bit insulating, question is how the sun would bounce around it.

FlashTec

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Reply with quote  #45 
On a Swedish forum people seem to think that with a proper fan on a panel like this the size could be half of what it is now. Thoughts?
Garage_Hermit

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Reply with quote  #46 
Duh, I don't know much, but to me, those people are thinking back-to-front !

The fan size don't enter in to it !

It's the *AREA* of the collector that decides how much insolation you capture, and you size the FAN accordingly !
in order to evacuate that amount of heat !

(and your collector "will" be sized according to how much POWER you need (and generally speaking, this is AS MUCH AS POSSIBLE) [biggrin]

G_H

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(1)  "Heat goes from hot to cold, there is no directional bias"
(2) It's wrote, "voilà" unless talking musical instruments...
FlashTec

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Reply with quote  #47 
I think it has to do with a faster recirculation of the air. As that's what the air does between the room and the panel. So the higher temperature you put in to the panel the warmer the air out well be. They are calculating it to increase watt in that way if I have understood it correctly
Garage_Hermit

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Reply with quote  #48 
sorry, I'm not convinced !

At the risk of repeating myself, using a bigger fan so that you can reduce the size of the collector is an upside-down thought process !

Scientifically referred to as "counter-intuitive" or commonly known as a NON-STARTER [biggrin]

G_H

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gbwillson

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Reply with quote  #49 
FlashTec-

I'm a firm believer of the advantages  of using a higher velocity through a collector. Why not see if some of the folks on the Swedish forum would like to come over to our site for a discussion about this subject. At the same time give us the link to their site so we can learn from them. I'd love to hear their reasoning.

Greg in MN[thumb]
FlashTec

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Reply with quote  #50 
I made a post on the Swedish forum so we will see if there will be any action. The forum is found on:

http://24volt.eu/phpBB3/viewforum.php?f=1

Don't know how much you will get out of it thou as everything is in Swedish :-)
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