<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:arial,helvetica,sans-serif;font-size:10pt">Carl -<br><br>Thanks for the input, this is very helpful and along the lines of what I was expecting. As you eluded to below, there are so many ways to skin the cat with solar hot water so I'm interested in hearing all sides of the story.<br><br>Does anyone out there have experience with oversized tanks lacking Carl's control scheme?<br><br>-August<br><br><div> </div>August Goers<br><br><div>Luminalt Energy Corporation<br>4000 Irving Street <br>San Francisco, CA 94122</div><br><br><div>Office: 415.564.7652<br>Mobile: 415.559.1525<br>august@luminalt.com<br>www.luminalt.com<br><div><br></div><div style="font-family: arial,helvetica,sans-serif; font-size: 10pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font size="2" face="Tahoma"><hr size="1"><b><span
style="font-weight: bold;">From:</span></b> Carl Adams <swingjunkie@gmail.com><br><b><span style="font-weight: bold;">To:</span></b> RE-wrenches <re-wrenches@lists.re-wrenches.org><br><b><span style="font-weight: bold;">Sent:</span></b> Saturday, January 31, 2009 5:19:24 AM<br><b><span style="font-weight: bold;">Subject:</span></b> Re: [RE-wrenches] Oversizing Solar Hot Water Storage?<br></font><br>
August,<br><br>Your assumption about oversizing the storage is correct, too much storage and the desired usage temperature will not be reached. Along with upsizing the storage you must change the design and control mechanism to allow priority loading of multiple storage tanks.<br>
Load tank 1 till your desired usage setpoint is reached then begin loading storage tank2 (assuming heat is available) , then tank 3 etc. Plumbing the tanks in series on the DHW side will allow you to draw from the warmest tank in the string. The Resol BS Plus controller supports such a loading scheme natively, you might download that controller manual and have a look. I'm sure this is one of only many possibilities.<br>
<br>With Regards<br>Carl<br><br><div class="gmail_quote">On Fri, Jan 30, 2009 at 6:06 PM, August Goers <span dir="ltr"><<a rel="nofollow" ymailto="mailto:august@luminalt.com" target="_blank" href="mailto:august@luminalt.com">august@luminalt.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;">Hi Solar Hot Water Wrenches –</span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;">Does anyone have experience or references
to the results of over sizing solar hot water storage tanks? We've been
approached on several instances to add additional storage (beyond the normal 1
to 2 gallons/ft^2 of collector size) to help bump up the solar fraction. I can
imagine that a grossly oversized storage tank could just simply never get very
warm or that the standby losses would be excessively large but I'm
looking for some more specific data and information.</span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;">Any info or opinions would help.</span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;">Thanks, August</span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
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<p><b><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy; font-weight: bold;">August
Goers</span></font></b></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;">Luminalt Energy Corporation</span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;">O: 415.564.7652</span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;">M: 415.559.1525</span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;">F: 650.244.9167</span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;"><a rel="nofollow" target="_blank" href="http://www.luminalt.com/">www.luminalt.com</a></span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;"><a rel="nofollow" ymailto="mailto:august@luminalt.com" target="_blank" href="mailto:august@luminalt.com">august@luminalt.com</a></span></font></p>
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<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
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