Modelica.Media.R134a.Common

Information

Package Content

Name	Description
PhaseBoundaryProperties	Thermodynamic base properties on the phase boundary
InverseDerivatives_rhoT	Derivatives required for inversion of density and temperature functions w.r.t. pressure and enthalpy states
EOSIdealCoeff	Record for coefficients of ideal term of helmholtz equation of state
EOSResidualCoeff	Record for coefficients of residual term of helmholtz equation of state
CubicSplineDerEval	Derivative of cubic spline
CubicSplineEval	Cubic spline
cv2Phase	Compute isochoric specific heat capacity inside the two-phase region
FindInterval	Half-interval search algorithm
helmholtzToBoundaryProps	Calulate phase boundary property record from dimensionless Helmholtz function

Modelica.Media.R134a.Common.PhaseBoundaryProperties

Information

Modelica.Media.R134a.Common.InverseDerivatives_rhoT

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Modelica.Media.R134a.Common.EOSIdealCoeff

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Parameters

Name	Description
nc	No. of coefficients in a
a[nc]	Coefficients of ideal term of helmholtz equation of state

Modelica.Media.R134a.Common.EOSResidualCoeff

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Parameters

Name	Description
nc	No. of coefficients in c, d, t, n
ns1	No. of zero coefficients in c
c[nc]	Coefficients of residual term of helmholtz equation of state
d[nc]	Coefficients of residual term of helmholtz equation of state
t[nc]	Coefficients of residual term of helmholtz equation of state
n[nc]	Coefficients of residual term of helmholtz equation of state

Modelica.Media.R134a.Common.CubicSplineDerEval

Information

Inputs

Name	Description
x	Input
coefs[4]	Spline coefficients

Outputs

Name	Description
yder	Spline derivative

Modelica.Media.R134a.Common.CubicSplineEval

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Inputs

Name	Description
x	Input
coefs[4]	Spline coefficients

Outputs

Name	Description
y	Output

Modelica.Media.R134a.Common.cv2Phase

Information

Inputs

Name	Description
liq	Properties on the boiling curve
vap	Properties on the condensation curve
x	Vapour mass fraction [1]
T	Temperature [K]
p	Pressure [Pa]

Outputs

Name	Description
cv	Isochoric specific heat capacity [J/(kg.K)]
dpT	Derivative of pressure w.r.t. temperature

Modelica.Media.R134a.Common.FindInterval

Information

Inputs

Name	Description
x	Input
breaks[:]	Grid points defining the intervals

Outputs

Name	Description
i	Found interval number
error	1=did not find interval

Modelica.Media.R134a.Common.helmholtzToBoundaryProps

Information

Inputs

Name	Description
f	Dimensionless derivatives of Helmholtz function

Outputs

Name	Description
sat	Phase boundary property record