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<p class=MsoNormal><font size=3 color=blue face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:blue'>Hi there gang,</span></font></p>
<p class=MsoNormal><font size=3 color=blue face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:blue'> </span></font></p>
<p class=MsoNormal><font size=3 color=blue face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:blue'>Just to say that IMHO solar thermal panels
will radiate quite a bit less than they collect, someone must have some data on
this ??</span></font></p>
<p class=MsoNormal><font size=3 color=blue face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:blue'> </span></font></p>
<p class=MsoNormal><font size=3 color=blue face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:blue'>Have a great Christmas.</span></font></p>
<p class=MsoNormal><font size=3 color=blue face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:blue'> </span></font></p>
<div>
<p class=MsoNormal><font size=3 color=blue face=Arial><span lang=EN-NZ
style='font-size:12.0pt;font-family:Arial;color:blue'>Carl Emerson</span></font></p>
<p class=MsoNormal><font size=3 color=blue face=Arial><span lang=EN-NZ
style='font-size:12.0pt;font-family:Arial;color:blue'>Free Power Ltd.</span></font></p>
<p class=MsoNormal><font size=3 color=blue face=Arial><span lang=EN-NZ
style='font-size:12.0pt;font-family:Arial;color:blue'>Web
www.freepower.co.nz</span></font></p>
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<p class=MsoNormal><font size=3 color=blue face=Arial><span style='font-size:
12.0pt;font-family:Arial;color:blue'> </span></font></p>
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face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Conrad Geyser<br>
<b><span style='font-weight:bold'>Sent:</span></b> 18 December 2009 5:42 p.m.<br>
<b><span style='font-weight:bold'>To:</span></b> nponzio@buildingenergyus.com;
'RE-wrenches'<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [RE-wrenches] solar
hot water nighttime recirc</span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'>Nicholas,</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'>You can certainly do
that. Most newer controllers have a “vacation” function that
will provide this. Another method is to put in a bypass to the check
valve that you can open and the system will naturally reverse thermo siphon at night.
Not much in the way of calculations other than the collectors reradiate
as effectively as they collect.</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'>Conrad</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'>Cotuit Solar</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'> </span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Nicholas Ponzio<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, December 16, 2009
10:54 PM<br>
<b><span style='font-weight:bold'>To:</span></b> RE-wrenches<br>
<b><span style='font-weight:bold'>Subject:</span></b> [RE-wrenches] solar hot
water nighttime recirc</span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-US
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>Apologies if this has already been discussed here.<br>
<br>
One heat diversion method I hear suggested often is recirculating through the
collectors (flatplate) at night. Are there any data, calculations or anecdotal
evidence on the effectiveness of this approach? That is, can I really radiate
as much energy back to a dark sky as I collect during the day?<br>
<br>
Thanks for any feedback.</span></font></p>
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style='font-size:12.0pt'><br>
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