[TRNSYS-users] Cooling loads... Strange results

[Thibaut VITTE]

Dear Trnsys Users,

I'm working on a rather big building, and I have a strange behaviour, 
that I don't understand.
The cooling loads computed by Trnsys follow a normal pattern, except 
some days, for one or 2 points  that ar 3 to 4 times greater than the 
baseline.
I've attached a picture to explain it better.

I've thought it was a bug in my inputs, so I tried to disable solar 
radiations, temperature, internal gains, I double checked my schedules, 
I... and I found nothing. Actually I found some minor errors, and they 
had an effect on the pattern (for example the "pikes" appear later in 
the year), but  the behaviour is still erratic.

So, is it possible that a convergence problem (even though I have a 
10^-3 tolerance convergence) makes this erratic behaviour ? It is a big 
building, with shading masks, internal windows, high coupling air flows 
(exactly in the zones that show the unexplainable loads), and the 
simulation takes a pretty long time.

I Hope someone has some answer, because I really don't see!..

Thanks in advance
-------------- next part --------------
A non-text attachment was scrubbed...
Name: debugging3.jpg
Type: image/jpeg
Size: 188448 bytes
Desc: not available
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20090515/7ff9df3a/attachment-0005.jpg>