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<p class=MsoNormal><span style='font-family:"Cambria","serif"'>Dear Fred,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>>>My solar thermal panels are not
producing any heat or elevated temperature. As the temperature of the water
inside the panel doesn’t exceed the ambient temperature, the pumps never
start, and there is no flow. <<<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>It is hard for someone else to detect the
problem unless he/she looks directly into your TRNSYS project. It seems to me
that your control doesn’t work properly, it may be the signal formulation
or its connection (perhaps to pump or collector).<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Cambria","serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>>>I have verified that the
connections from the weather file and the rest of the loop are correct. <<<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I am familiar with frustration that arises
when a TRNSYS project doesn’t work as expected. I used to ask a colleague
of mine to check the detailed results for me, i.e. the printed results of any
outputs from components that I suspect create the problem. You need to create a
file (I used to name it check.dat) that saves the printer (TYPE 25) outputs of
those components. Using excel, then you (or your colleague) can open the file
and go through it line by line to see if the make sense.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>In your case, you can try by setting a simulation
stop time of say 1 week (168 hrs) or even one day just to include the hours
when solar radiation exists.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='color:black'>Try to run the DHW.tpf
in the TRNYS \Examples folder and compare it with the one that you developed.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"Cambria","serif";
color:black'>regards,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"Cambria","serif";
color:black'>edward<o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-family:"Cambria","serif"'><o:p> </o:p></span></p>
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<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> Fred Betz [mailto:fbetz@aeieng.com] <br>
<b>Sent:</b> Friday, 23 April 2010 7:14 AM<br>
<b>To:</b> trnsys-users@cae.wisc.edu<br>
<b>Subject:</b> [TRNSYS-users] Unusual solar thermal operation<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-US>TRNSYS Users,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>My solar thermal panels are not producing
any heat or elevated temperature. As the temperature of the water inside the
panel doesn’t exceed the ambient temperature, the pumps never start, and
there is no flow. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I have verified that the connections from
the weather file and the rest of the loop are correct. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I put in the specs and IAM for this panel
from the SRCC data sheet. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Any thoughts on what I might be
forgetting/doing wrong?<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Thanks,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Fred<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
style='font-size:10.0pt;color:#660000;text-transform:uppercase'>Fred Betz</span></b><b><span
style='font-size:9.0pt;color:#333333'> </span></b><span
style='font-size:9.0pt;color:#333333'>PhD., LEED AP <br>
</span><span style='font-size:10.0pt;color:#333333;text-transform:uppercase'>Sustainable
Systems Analyst</span><span style='font-size:9.0pt;color:#333333'><o:p></o:p></span></p>
</td>
<td width=10 valign=top style='width:7.5pt;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><span style='font-size:9.0pt;color:#333333'> <o:p></o:p></span></p>
</td>
<td width=283 valign=top style='width:212.25pt;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
style='font-size:9.0pt;color:#660000'>AEI</span></b><span style='font-size:
9.0pt;color:#333333'> | AFFILIATED ENGINEERS, INC. <br>
5802 Research Park Blvd. | Madison, WI 53719<br>
<br>
</span><span style='font-size:9.0pt;color:#660000'>P: 608.236.1175 | F:
608.238.2614</span><span style='font-size:9.0pt;color:#333333'> <br>
</span><span style='font-size:9.0pt;color:#660000'><a
href="mailto:fbetz@aeieng.com"><span style='color:#660000;text-decoration:
none'>fbetz@aeieng.com</span></a> | <b><a
href="http://www.aeieng.com/"><span style='color:#660000;text-decoration:
none'>www.aeieng.com</span></a></b></span><span style='font-size:9.0pt;
color:#333333'> <o:p></o:p></span></p>
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<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
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