CODEWITHSUNDEEP
optimizationmodelicaincompatibility
ChiaraM
ChiaraM

Reputation: 23

Are there any sort of incompatibilities between the Optimization Library of Modelica and the TIL commercial library?

I suspect that the two libraries cannot work well together. Do you know something about it?

More specifically, I'm working on a transcritical CO2 heat pump and I want to find the optimal high pressure that maximizes the COP. The thing is that as soon as I put the signal criteria, the overall model won't translate anymore, giving me errors related to a TIL component (an heat exchanger). Everything works fine otherwise.

I know that TLK Energy has an optimization tool called Optimization Suite but I wanted to try the Modelica Optimization Library before asking them about their software.

EDIT: this is the error I get when translating the model. This happens only when I put the signal criteria block in the model, just as it can be seen in one of the example (controllerdDesign_F14). Perhaps am I doing something wrong?

enter image description here

Upvotes: 0

Views: 96

Answers (1)

Hans Olsson
Hans Olsson

Reputation: 12507

That criteria-block uses absMax and overshoot blocks that both require that the input signal can be differentiated; and the TIL-library does not allow differentiation of the model.

You could (likely) work around this issue by using a first-order filter between your model and the criteria-block; alternatively using a different criteria-block

Upvotes: 2

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