Re: [TRNSYS-users] External parameter files and TRNOPT

[David Bradley <bradley@tess-inc.com>]

Abdullahi,
  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,
 

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? 
2. Is it possible to use TRNOPT to optimise parameters included in an external file?
3. 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?

 
Regards
 
Abdullahi
 
Abdullahi Ahmed (BSc. MSc.) Postgraduate researcher
School of the Environment
University of Brighton
Cockcroft Building
Lewes Rd.
Brighton
BN2 4GJ
 
Tel: +44 01273 643455
 
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