[TRNSYS-users] (no subject)

[David Bradley]

Salim,
   First, make sure that you have a reasonable thermal capacitance set 
for your zone. The default thermal capacitance shown in TRNBuild only 
accounts for the thermal capacitance of the air in the zone. Typically a 
value about 5 times the default should be used.

   If that does not solve the problem then identify which zone is 
causing the problem and begin turning off things that impact the zone 
(gains from lights, gains from people, coupling air flows, etc.) until 
it becomes stable. It is usually not too hard to identify the problem 
that way.
Best,
  david


On 7/6/2010 04:57, salim mokraoui wrote:
>
> Dear all,
>
> I'm simulating a 5 zone building using a PID controller for each zone 
> (temperature control). The parameters of PID (type 23) are 
> predetermined and work well with another example (1 zone building). 
> With the 5 zone building the simulation stops after 1 hour and the 
> error message says: zone 5 surface 47 pane temperature out of bounds 
> at time 1.
>
> How to overcome this problem ?
>
> Salim MOKRAOUI
>
> Faculté des sciences de Nancy - LERMAB
>
> BP 239
>
> 54506 Vandoeuvre.
>
> Tél 03 83 68 48 47 - mél salim.mokraoui at lermab.uhp-nancy.fr
>
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at cae.wisc.edu
> https://www-old.cae.wisc.edu/mailman/listinfo/trnsys-users
>    

-- 
***************************
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
bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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