Re: [TRNSYS-users] (no subject)

[David Bradley <bradley@tess-inc.com>]

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@lermab.uhp-nancy.fr

 

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