[TRNSYS-users] (no subject)

[David BRADLEY]

Badreddine Dalal,
   You either have a wall that is too massive (usually too thick) for 
the wall transfer function coefficients to be generated or you have a 
wall that is not massive enough. If you look at the very end of the 
*.inf file that is generated when you try to save your TRNBuild project, 
you will see the transfer function coefficients of the walls as they are 
being generated. Look at the last one in the list; that is the wall that 
is causing problems. If you have ruled out that its construction is too 
thermally massive (i.e. it has fairly typical materials and overall 
thickness) then the problem may be that the wall does not have enough 
mass. This is often true if you are modeling doors (especially garage 
doors) or metal roofs. If this is the case then you should consider the 
wall layers to be massless (in the TRNBuild layer manager) and account 
only for their R value (neglecting their ability to store energy)
regards,
  David


On 06/10/2015 02:51, Dalal Badreddine wrote:
> Hello,
>
> I'm having a problem with TRNBuild, whenever i want to save my projet 
> i get an error message that says : Error creating the wall transfert 
> function coefficients.. unable to find root after indication that root 
> exists.
> I've check the thickness of the wall and i tried changing the timebase 
> several times but i still get the same message. Can you please tell me 
> what could possibly be the problem?
>
> Thank you very much
>
> -- 
>
> *
> *Badreddine Dalal*
> Elève ingénieur en Génie Civil à l'EHTP
> Etudiante en Master GC à l'Ecole Centrale de Lille
> **
> *
>
> Tél : 00 33 7 52 41 34 23​
> *
> E-mail : Badreddinedalal at gmail.com <mailto:Badreddinedalal at gmail.com>
>
>
>
> *
>
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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