[TRNSYS-users] TRNflow notice in theTRNSYs *.lst file

[Marion Hiller]

Hi,

 

TRNFlow is integrated in the code of multi-zone building model Type 56
of TRNSYS.

However, in order to activate it you need to buy the an add-on model
separately.

You can simply ignore this message “Message : TRNFLOW multi zone air
flow model integrated”
.

Regards,

 

Marion

 

  _____  

Von: pseudomino at gmx.com [mailto:pseudomino at gmx.com] 
Gesendet: Montag, 18. April 2011 09:58
An: TRNSYS-users at cae.wisc.edu
Betreff: [TRNSYS-users] Re : Re: Convection in a simple two storey zone

 

And what about this message I get in the List file ?
Message : TRNFLOW multi zone air flow model integrated

I use Trnsys17 and as far as I know there is no TRNFLOW installed.

 

   ----- Message d'origine -----

   De : David BRADLEY

   Envoyés : 15.04.11 20:47

   À : pseudomino at gmx.com

   Objet : Re: [TRNSYS-users] Convection in a simple two storey zone

    

   The Type56 model by itself does not calculate any interzonal air flow
   (ie the buoyancy of warmer air is not accounted for). Type56 allows
   you to specify coupling airflow between zones. Calculation of the
   coupling airflow must be done by integrating Type56's thermal
   solution with TRNFlow, COMIS, or Type97 (Contam). The effect you are
   seeing is only due to a change between the star-network (simple)
   radiation model and the gebhardt factor (detailed) radiation model
   now available in Type56.
   Kind regards,
    David
   
   On 4/14/2011 09:46, pseudomino at gmx.com wrote: 

   Hi,
   
   In Trnsys 17, I made a very simple test : two little air-nodes
   superposed, forming part of a thermal zone.
   There is only one windows facing south, at the first floor. I ditn't
   made anything else.
   
   Case 1 : Simple radiation model
   Quite realistically, the second floor is warmer.
   
   Case 2 : Detailed radiation model
   The 2 air-nodes have their temperatures centered around the same
   value and very near, except that the first floor has more extreme
   temperature variations.
   
   I want to illustrate the hot air elevation by a simple example, but
   I'm not sure of the phenomenon that are taken into account.
   
   Thank you ! 

    

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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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