Modelica.Media.Air.ReferenceAir

ReferenceAir: Detailed dry air model with a large operating range (130 ... 2000 K, 0 ... 2000 MPa) based on Helmholtz equations of state

Information

Calculation of fluid properties of air in the fluid region of 130 Kelvin to 2000 Kelvin at pressures up to 2000 MPa. To use this package in your model, select Air_dT, Air_pT or Air_ph according to which variables you choose to determine your state.

Restriction

The functions provided by this package shall be used inside of the restricted limits according to the referenced literature.

• p ≤ 2000 MPa
• 130 K ≤ T ≤ 2000 K

References

Lemmon, E. W., Jacobsen, R. T., Penoncello, S. G., Friend, D. G.:

Thermodynamic Properties of Air and Mixtures of Nitrogen, Argon, and Oxygen From 60 to 2000 K at Pressures to 2000 MPa. J. Phys. Chem. Ref. Data, Vol. 29, No. 3, 2000.

Lemmon, E. W., Jacobsen, R. T.:

Viscosity and Thermal Conductivity Equations for Nitrogen, Oxygen, Argon, and Air. International Journal of Thermophysics, Vol. 25, No. 1, January 2004

Verification

The verification report for the development of this library is provided here.

Acknowledgment

This library was developed by XRG Simulation GmbH as part of the Clean Sky JTI project (Project title: MoMoLib-Modelica Model Library Development for Media, Magnetic Systems and Wavelets; Project number: 296369; Theme: JTI-CS-2011-1-SGO-02-026: Modelica Model Library Development Part I). The partial financial support for the development of this library by the European Union is highly appreciated.

Some parts of this library refer to the ThermoFluid library developed at Lund University (http://thermofluid.sourceforge.net).

Copyright © 2013-2019, Modelica Association and contributors

Extends from Modelica.Icons.VariantsPackage (Icon for package containing variants).

Package Content

Name	Description
airConstants
MolarHeatCapacity	Type for molar heat capacity with medium specific attributes
MolarDensity
IsothermalExpansionCoefficient
Air_ph	ReferenceAir.Air_ph: Detailed dry air model (130 ... 2000 K) explicit in p and h
Air_pT	ReferenceAir.Air_pT: Detailed dry air model (130 ... 2000 K) explicit in p and T
Air_dT	ReferenceAir.Air_dT: Detailed dry air model (130 ... 2000 K) explicit in d and T
Air_Base	Properties of dry air calculated using the equation of state by Lemmon et. al.
Air_Utilities	Low level and utility computation for high accuracy dry air properties

Modelica.Media.Air.ReferenceAir.MolarHeatCapacity

Type for molar heat capacity with medium specific attributes

Parameters

Modelica.Media.Air.ReferenceAir.MolarDensity

Parameters

Modelica.Media.Air.ReferenceAir.IsothermalExpansionCoefficient

Parameters