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Yujun,<br>
I would not recommend loosening the tolerances in order to get the
simulation to run. You can get information on what those tolerances are
in the TRNEdit manual. The two things that I would start with on your
simulation are to first increase the thermal capacitance of your zones
to something like five times the default value. Recall that the default
value accounts only for the thermal capacitance of the air in the zones
and not for any furnishings. Second, I think you will need to run with
a time step less than one hour. Since TRNSYS can only make control
decisions once per time step, an hour is a very long time for control
decisions. The results of your equation "infil sur EscS et DP" change
the infiltration rate into your building, which in turn change the
building temperatures, which in turn change the infiltration rate. That
infiltration rate, applied to the building for an entire time step (an
hour) prevents convergence of the building temperatures. I would
recommend a time step on the order of 5 minutes. <br>
Kind regards,<br>
David<br>
<br>
<br>
Yujun TAO wrote:
<blockquote cite="mid:911284.56514.qm@web28613.mail.ukl.yahoo.com"
type="cite">
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<div>Hello,<br>
I have a problem of convergence when i simulated a complex building
with double skin ventilated. I found when the window "adjacent" has a
big surface like 60m² in zone "DPSE", the simulation took many times
and is difficult to converge. When the surface reduced like just has
10m², the simulation goes fast and has no problem of convergence. But
the window should have 78m² in the reality. <br>
So how could I resolve this problem? <br>
Sorry the files bui and tpf couldn't be attached with mail, blocked by
the firewall of yahoo.<br>
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<br>
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