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<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Hannes,<o:p></o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>I had a very quick look
at your project only. <o:p></o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Without knowing the aim
of the simulation, your project looks quite complicated to me because you divided
the church into many airnodes. <o:p></o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Is this really necessary?
Do you expect different temperatures for each airnode? <o:p></o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>For thermal modelling I
assume that three to four airnodes would be enough. Using more airnodes
increase <o:p></o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>the complexity significant
as well as the input and control effort without necessarily an increase in
accuracy.<o:p></o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>In addition, I wonder if
you really need a detailed distribution model for direct radiation. I assume
that GEOSURF <o:p></o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>yield to a good result. <o:p></o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>For evaluating air flow in
large volumes you need CFD rather than a network flow tool like TRNFlow. <o:p></o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>The resulting stratification
really depends on local airstreams raising /falling and you need a discretisation
of the volume. <o:p></o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>I doubt that TRNFlow gives
you the exoected result.<o:p></o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>In addition, the CFD would
be able to show you how many thermal airnodes are really required. <o:p></o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>I really recommend beginning
with a simple model. If the simple model works fine you may become <o:p></o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>more detailed and verify
that add adding detail really increases the accuracy of your model.<o:p></o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Marion<o:p></o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font>
</p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font>
</p>
<div>
<p class=MsoNormal><b><font size=2 color="#005a00" face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:#005A00;font-weight:bold'>Dipl.-Ing.
<st1:PersonName w:st="on">Marion Hiller</st1:PersonName> </span></font></b><b><font
size=2 color="#009900"><span style='font-size:10.0pt;color:#009900;font-weight:
bold'><br>
</span></font></b><b><font size=2 color="#007000" face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:#007000;font-weight:bold'>TRANSSOLAR:
KlimaEngineering - Technologien für energieeffizientes Bauen und Nutzerkomfort
in Gebäude </span></font></b><b><font size=1 color="#005a00" face=Arial><span
style='font-size:7.5pt;font-family:Arial;color:#005A00;font-weight:bold'><br>
Munich - New York - Stuttgart + 49.711.67976.0 <br>
<br>
</span></font></b><b><font size=1 color=black face=Arial><span
style='font-size:7.5pt;font-family:Arial;color:black;font-weight:bold'>Transsolar
Energietechnik GmbH, Curiestrasse 2, 70563 Stuttgart <br>
Amtsgericht Stuttgart - HRB 23347, Steuernummer 99073/00911, USt-IdNr.: DE152272639</span></font></b><font
color=navy><span style='color:navy'><o:p></o:p></span></font>
</p>
<p class=MsoNormal><b><font size=1 color=black face=Arial><span
style='font-size:7.5pt;font-family:Arial;color:black;font-weight:bold'>Geschäftsführer:
Dipl.Ing. Matthias Schuler, Dipl.Ing. Thomas Auer, Dipl.Phys. Stefan Holst,
Prof. Dipl.-Ing. Bleicher <o:p></o:p></span></font></b>
</p>
<div>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'> <o:p></o:p></span></font>
</p>
</div>
</div>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font>
</p>
<div>
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face="Times New Roman"><span 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 style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>Von:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Hannes Oppeel
[mailto:hoppeel@hotmail.com] <br>
<b><span style='font-weight:bold'>Gesendet:</span></b> Freitag, 20. April 2012
10:24<br>
<b><span style='font-weight:bold'>An:</span></b> <st1:PersonName w:st="on">trnsys-users@cae.wisc.edu</st1:PersonName><br>
<b><span style='font-weight:bold'>Betreff:</span></b> [TRNSYS-users]
Ventilation network solver</span></font><o:p></o:p>
</p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font>
</p>
<div>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'>Hi all<o:p></o:p></span></font>
</p>
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<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'><o:p> </o:p></span></font>
</p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'>I'm having a problem with trnflow in the church I'm
currently modeling: whenever I switch on trnflow I get a range check error.<o:p></o:p></span></font>
</p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'>When I take a look in the listfile it says:<o:p></o:p></span></font>
</p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'><o:p> </o:p></span></font>
</p>
</div>
<div>
<div>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'><o:p> </o:p></span></font>
</p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'> ***** WARNING ***** UNIT 14 TYPE 56, TIME = 5.000E+00<o:p></o:p></span></font>
</p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'> COMIS MESSAGE ***** ERROR ***** <o:p></o:p></span></font>
</p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'> Ventilation network solver reached maximum number of
Jacobian factorizations.<o:p></o:p></span></font>
</p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'> Increase &-PR-CONTrol Miter, or adjust the
network.<o:p></o:p></span></font>
</p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'> <o:p></o:p></span></font>
</p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'> VENTILATION NETWORK SOLVER REPORTS ERROR<o:p></o:p></span></font>
</p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'> <o:p></o:p></span></font>
</p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'> There were too many iterations.<o:p></o:p></span></font>
</p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'> The maximum allowed (see *CIF &-PR-CONTrol) is:
50<o:p></o:p></span></font>
</p>
</div>
</div>
<div>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'><o:p> </o:p></span></font>
</p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'>Any ideas what the problem could be, or how I can change
the maximum alowed iterations?<o:p></o:p></span></font>
</p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'><o:p> </o:p></span></font>
</p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'>Please help! It's urgent!<o:p></o:p></span></font>
</p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'><o:p> </o:p></span></font>
</p>
</div>
<div>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'>Hannes Oppeel<o:p></o:p></span></font>
</p>
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