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<p>Ahmed,</p>
<p> If your project has a lot of horizontal openings then this is
common problem. There are a couple of ways to work towards a
solution. <br>
</p>
<p> First, you can increase the number of iterations that CONTAM
allows by editing the *.air file. The first value in the third
line of the file is the allowable number of iterations. By default
it is set to 30. I usually increase it to 100.</p>
<p> Second, you may need to artificially delay the coupling between
TRNSYS and CONTAM. I usually delay the temperatures of the
airnodes coming from Type56 and being passed to CONTAM by using
either Type93 or Type661. If you do this, it is very important
that you also use a short timestep of 5 minutes or less) or else
the assumption of delayed times becomes unrealistic.</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<br>
<div class="moz-cite-prefix">On 10/30/2016 19:19, ahmed serageldin
via TRNSYS-users wrote:<br>
</div>
<blockquote
cite="mid:CAMzYqzqPudFn5wGZ829jWozgW9pHCOyzFcHRNyKjrDALZvAuRQ@mail.gmail.com"
type="cite">
<div dir="ltr">Dear all
<div><br>
</div>
<div>I try to couple between ContamW3 and TRNSYS Release
17.01.0028 via Type 97 and Type 65 to simulate natural
ventilation through windows but i get this error </div>
<div><br>
</div>
<div>Message : The multizone airflow model did not
converge in the maximum number of iterations.</div>
<div>What is the error exactly and what should i do to solve<br
clear="all">
<div>
<div class="gmail_signature">
<div dir="ltr">
<div>
<div dir="ltr">
<div style="text-align:left"><font size="2"><b>Yours
sincerely;</b></font></div>
<font size="2"><b>
<div style="text-align:left"><br>
</div>
<div style="text-align:left">Eng: Ahmed Mohamed
Awad</div>
</b></font>
<div style="text-align:left"><b>Ph.D student</b></div>
<div style="text-align:left"><b>Energy Resources
Engineering Department(ERE)</b></div>
<div style="text-align:left"><b>Egypt-Japan
University of Science and Technology(EJUST)</b></div>
<div style="text-align:left"><b>Mob:+2010-65078029</b></div>
<div style="text-align:left"><strong
style="font-size:12.8px"><font size="2">Email: <font
color="#00ffff"><font color="#3d85c6"><font
color="#0b5394"><a
moz-do-not-send="true"
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<pre class="moz-signature" cols="72">--
***************************
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="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
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