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modelicadymolaopenmodelica

Create array of replaceable media packages

If possible I would like to create an array of replaceable media packages that a user can then change each option using available choices.

Below is a typically way to define the medium.

  replaceable package Medium = Modelica.Media.Interfaces.PartialMedium
    "Coolant medium" annotation (choicesAllMatching=true);

The following is a prototype of what I was hoping could be done where each of the "Mediums" is potentially a different media.

parameter Integer n = 1 "Number of media models";
replaceable package Medium[n] = {Modelica.Media.Interfaces.PartialMedium}
    "Coolant medium" annotation (choicesAllMatching=true);

However, this is not acceptable modelica. I've tried using variations on records as well but found no success. Any ideas? Perhaps this is not permitted in Modelica... Thank you.

Solution

  • If it was possible to create such an array, consider how you could use it:

    model M
  replaceable package Medium[n];
  medium[1] m1; // "Creates a Medium array of size 1"; not reference to Medium 1
  Real r = Medium[1].f(...); // Disallowed syntax; function names do not contain subscripts
end M;

    You could probably try the following (works in OpenModelica; not tested in Dymola), but it is of limited value:

    package M
  constant Real r;
end M;

model Test
  M[2] m(r={1,2});
  M m1=m[1];
  M m2=m[2];
end Test;