Error simulating a chiller using the buildings library in Open Modelica.

modelica
open-modelica
chiller
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When I try to simulate the model, the following error presents itself.

Variable Chiller: Cyclically dependent constants or parameters found in scope 
Buildings.Fluid.Chillers.Carnot_TEva$Chiller: {COP_nominal,etaCarnot_nominal}.

Could someone please tell me how I can overcome this issue?

653

Siv

asked 2017-09-21 00:55:43 -0500

4.4k

__AmirRoth__

updated 2017-09-21 10:31:58 -0500

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Without more details it's hard to tell you where the cyclical parameters are...

Julien Marrec (2017-09-21 10:20:29 -0500) edit

Hi, sorry for the delayed response. However, Could you please tell me what additional details might be necessary ?Anyway, I was able to overcome this issue using -d = ignoreCycles in Tools>Options>Simulation.

But I am unable to understand what is running in the background. Previously the simulation never ran when this error occurred. But now it runs and still displays the error. Are the results reliable ?

The example I ma trying to run is Buildings.Fluid.Chillers.Examples.Carnot_TEva

Thank you for your response in advance.