ExternalMedia not working when using it through "Medium.BaseProperties" model about externalmedia

[sjoelund]

I don't know why it's complaining about ExternalMediaLib.dll, since I'm using libExternalMediaLib.a

Static libraries .a can only be used when it's been linked into the model. If a value is needed during compile-time, a dynamic library .dll is required.

[ferrucci-franco]

Hi again,

I found a workaround for the error: I filled the externalFluidConstants record by hand (so the code does not call woPhaseMedium_getCriticalPressure_C_impl and TwoPhaseMedium_getMolarMass_C_impl C functions, which apparently OM cannot find).

The media definition is now:

package NH3CoolProp "CoolProp model of NH3"
extends ExternalMedia.Media.CoolPropMedium(
mediumName = "Ammonia",
substanceNames = {"NH3"},
inputChoice=ExternalMedia.Common.InputChoice.pT,
externalFluidConstants=FluidConstants(
iupacName="Ammonia",
casRegistryNumber="7664-41-7",
chemicalFormula="H_{3}N_{1}",
structureFormula="unknown",
molarMass=0.01703026,
criticalTemperature=4.054e+02,
criticalPressure=11333000,
criticalMolarVolume=7.569004444444444e-05,
acentricFactor=0.253,
triplePointTemperature=1.95495e+02,
triplePointPressure=6.091223108131509e+03,
meltingPoint=195.4200,
normalBoilingPoint=2.398235545665792e+02,
dipoleMoment=1.42));
end NH3CoolProp;

NOTE: I removed the line:
ThermoStates = Modelica.Media.Interfaces.Choices.IndependentVariables.pT
since I couldn't see its use (Could someone confirm this???. Instead, I added the the following line:
inputChoice=ExternalMedia.Common.InputChoice.pT
which actually changed the state selection. I know this beacuse, if I changed to
inputChoice=ExternalMedia.Common.InputChoice.ph
then, the initialization process needed to solve a non-linear system of equations.

[casella]

@ferrucci-franco your Test1 model compiles correctly with the new 3.3.2 version. It then fails at runtime with

ExternalMedia error: unable to solve 1phase PY flash with Tmin=195.494, Tmax=239.585 due to error: HSU_P_flash_singlephase_Brent could not find a solution because Hmolar [0 J/mol] is below the minimum value of 1.94632523329 J/mol

but I guess that's another story.

We'll release 3.3.2 anytime soon, in the meantime you can get it from the latest binaries here.