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    <font size="+1">Clarke,<br>
         Do a search on Trickledown solar, or Modified Trickledown.<br>
         Very cost effective.  I'm planning on doing one, after some
      other must-do items get handled first.   There are a number of
      examples out there, starting with Thomason's design in the 60's, I
      believe still providing heat for a Vermont building.<br>
      <br>
      A few links:<br>
      Thomason's installation:<br>
<a class="moz-txt-link-freetext" href="http://www.google.com/url?sa=t&source=web&cd=7&sqi=2&ved=0CG0QFjAG&url=http%3A%2F%2Fwww.ece.vill.edu%2F~nick%2FSolar_Heat.pdf&rct=j&q=Thomason%20trickle%20down%20solar%20heating&ei=FiqRTt2xBu6ksQLZ7PW8AQ&usg=AFQjCNHeJXcYZhnPmujsXYhKRjeTz5DpCg&cad=rja">http://www.google.com/url?sa=t&source=web&cd=7&sqi=2&ved=0CG0QFjAG&url=http%3A%2F%2Fwww.ece.vill.edu%2F~nick%2FSolar_Heat.pdf&rct=j&q=Thomason%20trickle%20down%20solar%20heating&ei=FiqRTt2xBu6ksQLZ7PW8AQ&usg=AFQjCNHeJXcYZhnPmujsXYhKRjeTz5DpCg&cad=rja</a><br>
      <br>
      <a class="moz-txt-link-freetext" href="http://www.builditsolar.com/Experimental/MTD/MTD.htm">http://www.builditsolar.com/Experimental/MTD/MTD.htm</a><br>
      <br>
      <a class="moz-txt-link-freetext" href="http://www.jc-solarhomes.com/trickle_down_solar.htm">http://www.jc-solarhomes.com/trickle_down_solar.htm</a><br>
      <br>
      Cheers,<br>
      Joe<br>
      <br>
      <br>
    </font><br>
    On 10/8/2011 7:34 PM, Clarke Olsen wrote:
    <blockquote
      cite="mid:F0617C8D-1844-448B-8F87-5FCA2248A3F8@fairpoint.net"
      type="cite">
      <pre wrap="">
Does anyone have experience with, an opinion or knowledge of transparent exposed water collectors?
That is, a flat plate solar water heater where, instead of running the water under a copper field absorber,
the water runs between a glass face, and an absorbing surface. In such a device, the sun's heat would not
have to flow through a copper sheet to be drawn-off with water, but would be taken from the very surface
that absorbs it. A further development could be a dense black mesh in the cooling water, throughly scrubbed
of it's heat. A glass plate exposed to 60+psi would not be pretty, but under low (drain-back) pressure...
Clarke Olsen
373 route 203
Spencertown, NY 12165 
USA
518-392-4640
<a class="moz-txt-link-abbreviated" href="mailto:colsen@fairpoint.net">colsen@fairpoint.net</a>





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