[TRNSYS-users] External parameter files and TRNOPT

David Bradley bradley at tess-inc.com
Tue Jul 17 13:45:42 PDT 2007

   TRNOPT (actually, its underlying engine GenOPT) is designed to 
search for minimums by picking its own values for the optimization 
parameters. If you have one or two parameters that you want to 
optimize, it is easy enough to define some CONSTANTS in the input 
file and use TRNEdit to run a parametric table of the combinations 
that you want to see. If you have something more complex (and it 
sounds as though you do), you might want to look at Type70. If you 
have Type70 in your simulation, it reads an external file containing 
the values of TRNSYS model parameters that you want to change, 
ignores the values that are in the actual input file and replaces 
them with the values in the external file. I imagine that you will 
have to write something to put your node meshing results into the 
format desired by Type70's external file but that might be the best 
way to proceed.

>Hello all,
>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,
>    * 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?
>    * Is it possible to use TRNOPT to optimise parameters included 
> in an external file?
>    * 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?
>Abdullahi Ahmed (BSc. MSc.) Postgraduate researcher
>School of the Environment
>University of Brighton
>Cockcroft Building
>Lewes Rd.
>BN2 4GJ
>Tel: +44 01273 643455
>TRNSYS-users mailing list
>TRNSYS-users at engr.wisc.edu

Thermal Energy System Specialists (TESS), LLC
David BRADLEY                           2916 Marketplace Drive - Suite 104
Partner                                        Madison, WI 53719
Phone: (608) 274-2577 USA
Fax: (608) 278-1475
E-mail: bradley at tess-inc.com
Web Pages:  http://www.tess-inc.com     and      http://www.trnsys.com

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