[TRNSYS-users] External parameter files and TRNOPT

Diego A. Arias daarias at wisc.edu
Tue Jul 17 08:52:22 PDT 2007

Dear Abdullahi,

> I am using a component that reads some of its parameters from an 
> external parameter file. I am looking for the best way to carry out 
> optimisation of some of the inputs/parameters. I have the following 
> questions if someone will kindly help,

>    1. Is there any way to carry out a series of simulations that will
>       read a number of external parameter files and give results for
>       each simulation run? 
You can run series of simulations in TRNEdit, using a parametric table.  
Please go to the manual, Volume 7, and read the section for 'Parametric 
>    1. Is it possible to use TRNOPT to optimise parameters included in
>       an external file?
I would recommend that you take a look at the tutorial for 'Using GenOpt 
with TRNSYS 16 and Type 56'.  The implementation can be extended to what 
you want to do: modify some parameters in a text file and optimize it 
using GenOpt.
>    1. If  2 above is possible, is it also possible to carry out such
>       optimisation when one of the parameters is determined by the
>       node meshing and defined by the parameterisation in the external
>       file?
I would modify the program that writes the parameters so it also 
calculates the additional parameter.

Best regards,


Diego A. Arias
TRNSYS Coordinator
Solar Energy Laboratory
University of Wisconsin - Madison
1500 Engineering Drive
Madison, WI 53706

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