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Medium package declared constant without value #1513

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thomay86 opened this issue Jul 15, 2024 · 1 comment · May be fixed by #1567
Open

Medium package declared constant without value #1513

thomay86 opened this issue Jul 15, 2024 · 1 comment · May be fixed by #1567
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@HannahRomberg

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@thomay86
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Dear community,
I was just trying to use the refrigerant media models within my simulation. However, there seems to be a bug or incompatibility when using Media models with standard Modelica blocks that I cannot figure out:

Reproduce
Check the example AixLib.Media.Refrigerants.Examples.BranchingDynamicPipes and it will throw an error (checked with AixLib 1.3.4 and 1.4.0):

For variable package constant AixLib.Media.Refrigerants.R134a.R134a_IIR_P1_395_T233_455_Horner.ThermoStates
declared in class Modelica.Media.Interfaces.Choices, C:/Program Files/Dymola 2024x Refresh 1/Modelica/Library/Modelica 4.0.0/Media/package.mo at line 3926, and used in component AixLib.Media.Refrigerants.R134a.R134a_IIR_P1_395_T233_455_Horner.PartialMedium.

The variable package constant AixLib.Media.Refrigerants.R134a.R134a_IIR_P1_395_T233_455_Horner.ThermoStates
is declared as constant, but is given no value.

Basic type inconsistencies detected.

Check aborted.

ERRORS have been issued.

Desktop (please complete the following information):
Dymola 2024x Refresh 1, Windows 11
@HannahRomberg HannahRomberg self-assigned this Dec 16, 2024
@HannahRomberg HannahRomberg linked a pull request Dec 16, 2024 that will close this issue
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@HannahRomberg HannahRomberg linked a pull request Dec 16, 2024 that will close this issue
Add missing parametrization of BranchingDynamicPipes example #1567
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@HannahRomberg
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When using the refrigerant media model you need to specify the independent variables (in this case pressure and specific enthalpy) of the ThermoState model within the refrigerant parameters. I updated the example accordingly.

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@HannahRomberg HannahRomberg

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Add missing parametrization of BranchingDynamicPipes example RWTH-EBC/AixLib
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@HannahRomberg @thomay86