.Modelica.Media

Information

This library contains interface definitions for media and the following property models for single and multiple substance fluids with one and multiple phases:

• Ideal gases:
  1241 high precision gas models based on the NASA Glenn coefficients, plus ideal gas mixture models based on the same data.
• Water models:
  ConstantPropertyLiquidWater, WaterIF97 (high precision water model according to the IAPWS/IF97 standard)
• Air models:
  SimpleAir, DryAirNasa, ReferenceAir, MoistAir, ReferenceMoistAir.
• Incompressible media:
  TableBased incompressible fluid models (properties are defined by tables rho(T), HeatCapacity_cp(T), etc.)
• Compressible liquids:
  Simple liquid models with linear compressibility
• Refrigerant Tetrafluoroethane (R134a).

The following parts are useful, when newly starting with this library:

• Modelica.Media.UsersGuide.
• Modelica.Media.UsersGuide.MediumUsage describes how to use a medium model in a component model.
• Modelica.Media.UsersGuide.MediumDefinition describes how a new fluid medium model has to be implemented.
• Modelica.Media.UsersGuide.ReleaseNotes summarizes the changes of the library releases.
• Modelica.Media.Examples contains examples that demonstrate the usage of this library.

Copyright © 1998-2025, Modelica Association and contributors

Contents

Revisions

• February 01, 2017 by Thomas Beutlich:
  Fixed data errors of the NASA Glenn coefficients in some ideal gases (CH2, CH3, CH3OOH, C2CL2, C2CL4, C2CL6, C2HCL, C2HCL3, CH2CO_ketene, O_CH_2O, HO_CO_2OH, CH2BrminusCOOH, C2H3CL, CH2CLminusCOOH, HO2, HO2minus, OD, ODminus), see #1922
• May 16, 2013 by Stefan Wischhusen (XRG Simulation):
  Added new media models Air.ReferenceMoistAir, Air.ReferenceAir, R134a.
• May 25, 2011 by Francesco Casella:
  Added min/max attributes to Water, TableBased, MixtureGasNasa, SimpleAir and MoistAir local types.
• May 25, 2011 by Stefan Wischhusen:
  Added individual settings for polynomial fittings of properties.