[TRNSYS-users] I'm a beginner, help for change the fluid

[David BRADLEY]

Fabio,
   It depends on how the ORC has been modeled. If you are using a non 
standard Type that was developed to model an ORC then it may be as 
simple as changing a parameter. If the ORC is modeled by a series of 
standard components that make calls to TRNSYS's STEAM routines then 
changing fluids is very difficult; you would need to modify the Types so 
that they call a routine that generates all of the state properties for 
the ORC fluid that you want to work with.

There are a few other possibilities as well:
   One alternative is that you can model the ORC a bit more simply using 
a performance map approach. In this approach, you would use Type42, 
which simply reads and interpolates a data file. You would have to 
identify the independent variables of the ORC (source temperature, sink 
temperature, fluid flow rate, etc.). You would have to then provide the 
values of the dependent variables (you have to identify these as well) 
for each possible combination of independent variables.

   Another alternative is to model the ORC in either Excel or EES and 
then call the model from TRNSYS using Type62 or Type66. EES would 
probably be the easiest since it has a large library of thermophysical 
properties built into it.

Kind regards,
  David



On 11/25/2011 02:57, fapilt at libero.it wrote:
>
> Dear all,
>
> I'm a beginner  of this program and I would like to know how can i 
> change the fluid in a rankine cycle from water to a specific ORC 
> (organic rankine cycle)?
>
> Please answer me, i need for my thesis.
>
>
> Would be very grateful for your help
>
>
> Regards
>
> Fabio
>
>
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at cae.wisc.edu
> https://mailman.cae.wisc.edu/listinfo/trnsys-users

-- 
***************************
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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