[TRNSYS-users] TRNFLOW ventilation height problem

[Wirich FREPPEL]

Hi all users,

I'm having trouble when configuring the dual flow ventilation system in 
TRNFLOW.

The two fans, as well as the straight ducts are well set. Everything was 
fine until I decided to modify the height of the ventilation system. At 
first, everything was set at a height of 0 meter. Then I set the 
auxiliary nodes (one for fresh air and one for exhausted air) at a 
height of 2.4m. Furthermore, I set the height of the straight duct link 
at 2.4m too (both From-Node and To-Node). I did that thinking that it 
would have an impact on internal convection.

Now the simulation ends at around 27 hours, saying that "convergence of 
the internal iteration of TYPE56 is not atteined within 100max. number 
of iterations".

It works only when I put the tolerance of internal iterations at 0.1. 
But results are not satisfying.

Hopefully one of you did already meet this kind of error...

I attache the following files, so that you can understand what I've done 
and what the problems are:

  * modele.cer
  * modele.b17

King regards

-- 
Wirich FREPPEL
Ingenieur Doctorant en Recherche & Developpement
Centre R&D de Noirot - Groupe Muller
8 rue Louis Ampere, 02030 Laon
+33 (0)3 23 27 31 99

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