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Michael,<br>
The error you are getting is that the zone temperature / zone air
flow model is not converging in type56. It is a bit hard to tell the
cause of the problem from looking at the *.lst file. If I had to
make a wild guess as to the cause of the problem, Type56 allows you
to specify a constant convection coefficient or will calculate a
convection coefficient for the inside surfaces of walls (and floors,
and ceilings). The internally calculated convection coefficient
depends on the difference (and on the sign of the difference)
between the surface temperature and the air temperature. I would
guess that something in the way that you have defined the cooled
ceiling is causing the convection coefficient not to converge;
perhaps the cooled ceiling has too large a capacity, perhaps the
inlet temperature is so low that the surface temperature is not
reasonable, perhaps the controls on whether flow is going to the
chilled ceiling do not have enough hysteresis. You might start by
trying to get the model to run with a constant convection
coefficient for the chilled ceiling.<br>
Kind regards,<br>
David<br>
<br>
<br>
On 5/2/2012 07:43, <a class="moz-txt-link-abbreviated" href="mailto:e0526036@student.tuwien.ac.at">e0526036@student.tuwien.ac.at</a> wrote:
<blockquote
cite="mid:20120502144331.55181qhfq3wt2d4j@webmail.tuwien.ac.at"
type="cite">Dear TRNSYS-users,
<br>
<br>
I am trying to simulate a cooled ceiling. However, as soon as I
start the simulation (F8) an alert appears as can be seen in the
attachment. Further, I cannot edit the Building (Type 56) anymore
and I have to restart from the last backup.
<br>
<br>
I have attached the .lst file as well.
<br>
<br>
Thank you very much for your suggestions!
<br>
Kind regards
<br>
<br>
Michael Mischkot
<br>
<br>
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<br>
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</blockquote>
<br>
<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>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
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