<html><body><div style="color:#000; background-color:#fff; font-family:verdana, helvetica, sans-serif;font-size:14pt"><div><span><font size="3" face="Times New Roman">
</font><span style='color: black; font-family: "Times New Roman","serif"; font-size: 14pt; mso-ascii-theme-font: major-bidi; mso-fareast-font-family: "Times New Roman"; mso-hansi-theme-font: major-bidi; mso-bidi-theme-font: major-bidi;'>Dear
David<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></span></div><div><font size="3" face="Times New Roman">
</font><span style='color: black; font-family: "Times New Roman","serif"; font-size: 14pt; mso-ascii-theme-font: major-bidi; mso-fareast-font-family: "Times New Roman"; mso-hansi-theme-font: major-bidi; mso-bidi-theme-font: major-bidi;'>Thank you for your valuable advice.
I agree with you that using type 33 (together with type 539) is somehow important to
predict the air properties at the outlet.<o:p></o:p></span></div><div><font size="3" face="Times New Roman">
</font></div><div style="margin: 0in 0in 10pt; line-height: normal;" class="MsoNormal"><span style='color: black; font-family: "Times New Roman","serif"; font-size: 14pt; mso-ascii-theme-font: major-bidi; mso-fareast-font-family: "Times New Roman"; mso-hansi-theme-font: major-bidi; mso-bidi-theme-font: major-bidi;'>Best Regards<o:p></o:p></span></div><div><font size="3" face="Times New Roman">
</font></div><div style="margin: 0in 0in 10pt; line-height: normal;" class="MsoNormal"><span style='color: black; font-family: "Times New Roman","serif"; font-size: 14pt; mso-ascii-theme-font: major-bidi; mso-fareast-font-family: "Times New Roman"; mso-hansi-theme-font: major-bidi; mso-bidi-theme-font: major-bidi;'>Nidal Abdalla<o:p></o:p></span></div><div><font size="3" face="Times New Roman">
</font></span> <font size="2" face="Arial"><div style="margin: 5px 0px; padding: 0px; border: 1px solid rgb(204, 204, 204); height: 0px; line-height: 0; font-size: 0px;" class="hr" contentEditable="false" readonly="true"></div> <b><span style="font-weight: bold;">From:</span></b> David BRADLEY <d.bradley@tess-inc.com><br> <b><span style="font-weight: bold;">To:</span></b> Nidal Abdalla <nidalabdalla@yahoo.com> <br><b><span style="font-weight: bold;">Cc:</span></b> Matt Duffy <duffy@tess-inc.com>; "trnsys-users@cae.wisc.edu" <trnsys-users@cae.wisc.edu> <br> <b><span style="font-weight: bold;">Sent:</span></b> Monday, October 29, 2012 5:47 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [TRNSYS-users] Glazed air collector<br> </font></div><div style="font-family: verdana, helvetica, sans-serif; font-size: 14pt;"><div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <br>
<div id="yiv1333021371">
<div>
Nidal,<br>
There are a couple of things you need to be a little bit cautious
about in this. First, Type539 only accounts for sensible heating and
cooling. The assumption is that the absolute humidity ratio of the
air entering and leaving the collector is the same. During daytime,
this is likely not a problem but because the temperature changes
through the collector, you'll need to put a Type33 at the outlet in
order to correctly recalculate the outlet air relative humidity.
Second, Type539 does not take into account longwave radiation loss
that typically happens at night. Your working fluid will only cool
down to ambient, not below it. While this is true for both water and
air based collectors, the impact is a little more important for
air-based collectors because, as I mentioned in the first caution,
the Type only handles sensible energy so while in real life you
might get some condensation occurring inside the collector at night,
this effect will not be seen in the model.<br>
Best,<br>
David<br>
<br>
<br>
<div class="yiv1333021371moz-cite-prefix">On 10/26/2012 17:33, Nidal Abdalla
wrote:<br>
</div>
<blockquote type="cite">
<div style="color: rgb(0, 0, 0); font-family: verdana, helvetica, sans-serif; font-size: 14pt; background-color: rgb(255, 255, 255);">
<div><span>Dear Matt</span></div>
<div><span></span> </div>
<div><span>Thank you v.much for your reply.</span></div>
<div><span></span> </div>
<div><span>Nidal Abdalla</span></div>
<div><span></span> </div>
<div style="font-family: verdana, helvetica, sans-serif; font-size: 14pt;">
<div style="font-family: times new roman, new york, times, serif; font-size: 12pt;">
<div dir="ltr"> <font size="2" face="Arial"> <b><span style="font-weight: bold;">From:</span></b> Matt
Duffy <a class="yiv1333021371moz-txt-link-rfc2396E" href="mailto:duffy@tess-inc.com" rel="nofollow" target="_blank" ymailto="mailto:duffy@tess-inc.com">mailto:duffy@tess-inc.com</a><br>
<b><span style="font-weight: bold;">To:</span></b> Nidal
Abdalla <a class="yiv1333021371moz-txt-link-rfc2396E" href="mailto:nidalabdalla@yahoo.com" rel="nofollow" target="_blank" ymailto="mailto:nidalabdalla@yahoo.com">mailto:nidalabdalla@yahoo.com</a> <br>
<b><span style="font-weight: bold;">Cc:</span></b>
<a class="yiv1333021371moz-txt-link-abbreviated" href="mailto:trnsys-users@cae.wisc.edu" rel="nofollow" target="_blank" ymailto="mailto:trnsys-users@cae.wisc.edu">trnsys-users@cae.wisc.edu</a> <br>
<b><span style="font-weight: bold;">Sent:</span></b>
Friday, October 26, 2012 7:26 PM<br>
<b><span style="font-weight: bold;">Subject:</span></b>
Re: [TRNSYS-users] Glazed air collector<br>
</font> </div>
<br>
<div id="yiv1333021371">
<div>
<div>Dear Nidal Abdalla,</div>
<div> </div>
<div>I have used Type539 (Glazed Flat Plate Solar
Collector from TESS Solar Library) with success for a
solar air collector. Since the solar air collector was
here in the states, they had the SRCC rating numbers
for the efficiency and IAM's, so I could simply enter
those numbers into the parameters of Type539. Since
this solar collector model and many others in TRNSYS
assume a constant fluid specific heat, you can
implement solar air heating simulations with them.</div>
<div> </div>
<div>Best regards,</div>
<div> </div>
<div>Matt Duffy</div>
<div> </div>
<div>On 2012-10-16 16:15, Nidal Abdalla wrote:</div>
<blockquote style="width: 100%; padding-left: 5px; margin-left: 5px; border-left-color: rgb(16, 16, 255); border-left-width: 2px; border-left-style: solid;" type="cite">
<div style="color: rgb(0, 0, 0); font-family: verdana, helvetica, sans-serif; font-size: 14pt; background-color: rgb(255, 255, 255);">
<div>Dear all</div>
<div> </div>
<div>I am trying to simulate glazed air collector
for space heating using TRNSYS 17 with TESS
libraries. Anyone can recommend the best choice
for collector type can be used? I found at the
TRNSY archives 2010 that Mr. David had
mentioned that there are a number of air-based
solar collectors available in the TESS Solar
Component. In fact, I found only unglazed air
collector in the TESS lib. I am wondering if
someone can help me.</div>
<div><var id="yiv1333021371yui-ie-cursor"></var> </div>
<div>Regards</div>
<div> </div>
<div>Nidal Abdalla</div>
<div> </div>
<div>National Energy Research Center</div>
<div>Amman - Jordan </div>
<div> </div>
<div> </div>
</div>
</blockquote>
</div>
</div>
<br>
<br>
</div>
</div>
</div>
<br>
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</pre>
</blockquote>
<br>
<pre class="yiv1333021371moz-signature">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
<a class="yiv1333021371moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com" rel="nofollow" target="_blank" ymailto="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
http://www.tess-inc.com
http://www.trnsys.com</pre>
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