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Solar panel construction

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Posted by Steve Barker LT on November 6, 2006, 3:44 am
If I'm going to make my own panel for a radiant slab, which is a better way
to go?  Run the tubing in a serpentine fashion, or like a manifold system?
I plan to use copper tubing under glass.

Steve Barker

Posted by SJC on November 6, 2006, 6:08 am

I would say serpentine would give you higher temperature but less BTUs.
So, If you have enough of them to get sufficient BTUs, use serpentine.

Posted by Jeff on November 6, 2006, 9:50 am
 SJC wrote:

   What does it matter what the outlet temperature is after 1 pass
through the collector. If you want higher temps in one pass you can
lower the flow, but.... you want to raise the temperature of your
thermal store and that means the more BTUs in the higher the temperature.


Posted by SJC on November 6, 2006, 4:22 pm

  I think serpentine may be easier to build with the soft copper tubing shown on
Gary's site.
And the roof integrated serpentine collectors shown here on page 13 of 20.
You would have a manifold feeding many serpentine collectors. So the answer is,

Posted by Jeff on November 7, 2006, 1:32 am

I can't find the article that has the serpentine...

Wow, is that cool. Looks like a roof collector version of a radiant
floor. Not too efficient, but still pretty cool.

   My Solkote just came in. It's been a little too cool here to paint
the boxes and I haven't drilled and soldered up the manifolds anyway!
It's hard to argue that serpentine wouldn't be easier!


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