Dear Wirich,
" Flow matrix is singular" means, that the flow network cannot be solved. This can happen if nodes are not well connected. Two rules must be applied here:
- All nodes have to be connected in
one network
- Dead ends are not allowed.
In your model, rule1 is applied but rule2 not (see red circle in the ).
I connected them with three dummy cracks to make it work…
LINK CR_001 : ID= 29 : FRNODE= P4 : TONODE= CELLIER : FRHEIGHT= 0 : TOHEIGHT= 0 : WIOWNHF= 1 : FSCALE= 1
LINK CR_001 : ID= 32 : FRNODE= CELLIER : TONODE= WC : FRHEIGHT= 0 : TOHEIGHT= 0 : WIOWNHF= 1 : FSCALE= 1
LINK CR_001 : ID= 33 : FRNODE= WC : TONODE= SDB : FRHEIGHT= 0 : TOHEIGHT= 0 : WIOWNHF= 1 : FSCALE= 1
Best
Jakob
__________________________________________________________________________________________________
Jakob Merk M.Sc.
Transsolar Energietechnik GmbH
Curiestraße 2
70563 Stuttgart
http://www.transsolar.com
Transsolar: KlimaEngineering- Technologien für energieeffizientes Bauen und Nutzerkomfort in Gebäuden
Stuttgart – München – New York – Paris
Geschäftsführer :Diplom-Ingenieur Matthias Schuler, Diplom-Ingenieur Thomas Auer, Diplom-Physiker Stefan Holst, Diplom-Betriebswirt Dieter Schnelle
Eingetragen beim Amtsgericht Stuttgart HRB 23347,
Steuernummer: 99073/00911,USt-IdNr.: DE 152272639
-----Ursprüngliche Nachricht-----
Von: TRNSYS-users [mailto:trnsys-users-bounces@lists.onebuilding.org] Im Auftrag von Wirich via TRNSYS-users
Gesendet: 24 November 2017 18:13
An: trnsys-users@lists.onebuilding.org
Cc: freppelw@noirot.fr
Betreff: [TRNSYS-users] Problem Ventilation in TRNFLOW
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