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:
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 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----- 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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