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Re: [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
 

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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

 

 

 

 

 

 

 

 

 

 

 

 

 

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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.


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Roberto Garay Martinez
Labein-Tecnalia
Unidad de Construcción y Desarrollo del Territorio
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Tel.: 34 94 607 33 00
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FN:Matthias Kersken (Matthias.Kersken@ibp.fraunhofer.de)
ORG:Fraunhofer Institut für Bauphysik
TITLE:Wissenschaftlicher Mitarbeiter
TEL;WORK;VOICE:+49 (08024) 643 - 204
TEL;WORK;FAX:+49 (08024) 643 - 366
URL;WORK:http://www.Bauphysik.de
EMAIL;PREF;INTERNET:Matthias.Kersken@ibp.fraunhofer.de
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