[TRNSYS-users] WG: Type 99 and units

Thu Apr 14 02:57:44 PDT 2011

Dipl.-Ing. Marion Hiller 
TRANSSOLAR: KlimaEngineering - Technologien für energieeffizientes Bauen
und Nutzerkomfort in Gebäude 
Munich - New York - Stuttgart + 49.711.67976.0 

Transsolar Energietechnik GmbH, Curiestrasse 2, 70563 Stuttgart 
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Dipl.Phys. Stefan Holst, Prof. Dipl.-Ing. Bleicher 

  _____  

Von: Marion Hiller 
Gesendet: Donnerstag, 14. April 2011 11:57
An: pseudomino at gmx.com
Betreff: AW: [TRNSYS-users] Type 99 and units

Dear David,

Type 99 is a little confusing with regards to units.

In the data file radiation data is assumed to be in W/m² if you use the
following definition of “mult” and “add”

"<var>    IBEAM_H    <col>    5  <interp> 0  <add>  0  <mult>  1
<samp>  -1    !...to get radiation in W/m²"

Nevertheless, the outputs are converted within the Type into “kJ/ hr m²”
. Therefore, you don’t need an equation!

Regards,

Marion

  _____  

Von: pseudomino at gmx.com [mailto:pseudomino at gmx.com] 
Gesendet: Donnerstag, 14. April 2011 11:32
An: TRNSYS-users at cae.wisc.edu
Betreff: [TRNSYS-users] Type 99 and units

Thank you,
So I won't use these pull-down menus and use Equations instead to covert
them.

But I need a simple confirmation about my question : when I use a Type
99, the radiations :
- are given in W/m2
-mulitiplied by 3.6 to be outputed in kJ/hr.m2
Am I right ?

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

   De : David BRADLEY

   Envoyés : 13.04.11 20:12

   À : pseudomino at gmx.com

   Objet : Re: [TRNSYS-users] Type 99 / 109 and units

   Be very careful!!! You cannot change units using the pulldown menu in
   any component's inputs tab!!! A component's output values are passed
   directly to the appropriate component input values without any
   modification regardless of what units you have selected in the inputs
   or outputs tab. Those pulldown menus are only at the interface level;
   when the Studio writes the deck file, it writes everything in the
   base units of the proforma. Note that it is safe to change the units
   of parameters (and unconnected inputs) again because they will be
   converted to base units when the Studio writes the deck.

   We do not recommend using Type109. Type109's functionality was moved
   to Type99 (for the "user-defined" data file mode) and to Type15 (for
   the standard TRY file format). If you find references to Type109 in
   the documentation, please let us know so that we can refer to the
   proper component instead!
   Regards,
    David

   On 4/13/2011 03:29, pseudomino at gmx.com wrote: 

   Hello there,

   I have a doubt with my units. I use a Type 99 and I can see in the
   Outputs tab "kJ/hr.m^2" for the radiations.
   But in the exemple file (of user defined file), there is this line :
   "<var>    IBEAM_H    <col>    5  <interp> 0  <add>  0  <mult>  1
   <samp>  -1    !...to get radiation in W/m²"
   So I wonder if I can ignore this unit in type 99 (kJ/hr.m^2) and just
   change it to W/m^2 in type 56's Inputs tab.

   By the way, I don't realy understand what is type 109 ? It is often
   mentionned in the user guide, but it seems that it is a generic
   component ?

   Thanks in advance

     _______________________________________________ TRNSYS-users
   mailing list TRNSYS-users at cae.wisc.edu
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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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