[TRNSYS-users] negative coupling values

[David Bradley]

Mattheiu,
   I have not run into that error but I would 
guess that it means that the air flow from zone A 
to zone B was calculated as a negative number. 
Airflow from zone A to zone B must always be 
positive. If the air flow turns around and flows 
the other direction then you need to define a 
coupling air flow rate from zone B to zone A. The 
reason for this is that by defining only positive 
air flows (perhaps in both directions) you can 
define a mixing flow, not just a net flow between the two zones.
Cheers,
David


At 09:52 6/20/2007, Matthieu Cosnier wrote:
>Dear TRNSYS users
>Does anybody know what  the error message "negative coupling value" mean?
>It seems to be due to type 56.
>My simulation program works usualy but not for a 
>particular ventilation air flow rate.
>Thanks for your answers
>
>COSNIER Matthieu
>
>*************************************************************
>Doctorant
>LOCIE
>Polytech'Savoie - Université de Savoie
>Campus Scientifique Savoie Technolac
>73376 Le bourget du lac Cedex (FRANCE)
>Tel : +33(0)4 79 75 88 21  poste(77 69)
>email: matthieu.cosnier at etu.univ-savoie.fr
>*************************************************************
>
>_______________________________________________
>TRNSYS-users mailing list
>TRNSYS-users at engr.wisc.edu
>https://www.cae.wisc.edu/mailman/listinfo/trnsys-users

****************************************************************************************
Thermal Energy System Specialists (TESS), LLC
David BRADLEY                           2916 Marketplace Drive - Suite 104
Partner                                        Madison, WI 53719
Phone: (608) 274-2577 USA
Fax: (608) 278-1475
E-mail: bradley at tess-inc.com
Web Pages:  http://www.tess-inc.com     and      http://www.trnsys.com

"Providing software solutions for today's energy engineering projects"
****************************************************************************************
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20070620/73c504e0/attachment-0005.htm>