Thank you for your help.
I had already discovered that lowering
the timestep helped my simulation convergence and with a 0.01h timestep
the simulation converges.
My main problem was that the input temperature
was very sensitive to the output temperature on the capilary tubes.
type 93 is a very usefull help I didn´t
know about, and it will be very practical for this case.
Thank you.
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Roberto Garay Martinez
Labein-Tecnalia
Unidad de Construcción y Desarrollo del Territorio
c/Geldo. Parque Tecnológico de Bizkaia
Edificio 700
48160 Derio (Bizkaia)
Tel.: 34 94 607 33 00
Fax: 34 94 607 33 49
www.labein.es
---------------------------------------------------------------------------
Visite nuestro blog:
http://www.energiaenedificacion.com
------------------------------------------------------------------------
Bilbao, 17-19 de Mayo, 2010
Open and Sustainable Building
Edificación Adaptable y Sostenible
www.OpenBuilding-2010.org
--------------------------------------------------------------------------
<rgaray@labein.es>, "LISTA
DE CORREO USUARIOS TRNSYS " <trnsys-users@cae.wisc.edu>
cc
Asunto
AW: [TRNSYS-users] active layer convergende
criteria
Hello Mr. Martinez!
What is Your input for Your variable
inlet-temperature?
If it is e.g. a temperature from
the room containing the active layer You may try to route this value over
a Type93 - "Input Value Recall" (Utility).
This may prevent Your system from
oscillating and every real controller as a time-delay.
It You do so, I recommend using
a timestep of 1 minute (You may test it with lager timestep).
Do You use a controller?
If yes; what kind?
With regards,
Matthias
Kersken
---
Dipl.-Ing. Matthias Kersken
Wissenschaftlicher Mitarbeiter / Abteilung Energiesysteme
Fraunhofer-Institut für Bauphysik
Institutsteil Holzkirchen
Fraunhoferstraße 10
83626 Valley
eMail: Matthias.Kersken@ibp.fraunhofer.de
Telefon 08024 / 643-204
Telefax 08024 / 643-366 www.ibp.fraunhofer.de
Dipl.-Ing. Matthias Kersken
Research Associate / Department Energy Systems
Fraunhofer Institute for Building Physics
Branch Holzkirchen
Fraunhoferstraße 10
D-83626 Valley
eMail: Matthias.Kersken@ibp.fraunhofer.de
Phone +49 8024 / 643-204
Fax +49 8024 / 643-366 www.ibp.fraunhofer.de
---
Von: rgaray@labein.es [mailto:rgaray@labein.es]
Gesendet: Donnerstag, 4. Februar 2010 16:15
An: LISTA DE CORREO USUARIOS TRNSYS
Betreff: [TRNSYS-users] active layer convergende criteria
Dear all,
I'm trying to model a active layer but get always the same error: "outside
temperature of 2(external)wall in zone 2at time 1.00 not converged".
This happens when I set a variable input as inlet fluid temperature, but
it will work when it is set to a constant.
Does anyone know which convergence restrictions should I consider?
Thanks in advance.
--------------------------------------------------------------------------
Roberto Garay Martinez
Labein-Tecnalia
Unidad de Construcción y Desarrollo del Territorio
c/Geldo. Parque Tecnológico de Bizkaia
Edificio 700
48160 Derio (Bizkaia)
Tel.: 34 94 607 33 00
Fax: 34 94 607 33 49
www.labein.es
---------------------------------------------------------------------------
Visite nuestro blog:
http://www.energiaenedificacion.com
------------------------------------------------------------------------
Bilbao, 17-19 de Mayo, 2010
Open and Sustainable Building
Edificación Adaptable y Sostenible
www.OpenBuilding-2010.org
--------------------------------------------------------------------------