[TRNSYS-users] Problem Ventilation in TRNFLOW

[freppelw at noirot.fr]

Hi everyone,

I'm still encountering the same problem about ventilation in my project. 
I've set all the ventilation network, and then I closed all the windows. 
There is no heating device in the building.
I don't understand why, but at around 749 hours, I encounter this error:


  COMIS MESSAGE  ***** ERROR *****
  Flow matrix is singular ! This might be caused by a zone that has no
  ventilation at all in this condition.
  Age of air and air change efficiency output is invalid !

And this occurs until the end of the simulation, though the simulation 
runs until the end. I only found that when I opened the .cer file.

Moreover, when I put a heating device in a room, with limited power, the 
simulation stops before the end, saying that convergence was not 
reached. Do you think this is related to the COMIS ERROR I showed just 
before?

If someone can help me, I attach all my project to this mail, with an 
illustration, in order to better understant what I did. I used TRNSYS17.

Thank you in advance.

King Regards

Wirich

PhD student
Laboratoy of innovative technologies, University of Picardie Jules 
Vernes
Avenue des Facultés, Salouël
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