.AixLib.Media.Refrigerants.Interfaces.TemplateHybridTwoPhaseMediumRecord

Information

This package is a template for new refrigerant models using a hybrid approach based on the "Fast_Propane" model developed by Sangi et al. (for detailed information, please checkout AixLib.Media.Refrigerants.Interfaces.PartialHybridTwoPhaseMediumRecord ). For a new refrigerant model just make a copy of this package, remove the "partial" keyword from the package and provide the information that is requested in the comments of the Modelica code. The following information is requested:

1. Fluid constants: Provide basic information of the refrigerant and add the reference.
2. Basic information: Provide basic information like the refrigerant name and its valid fluid limits in terms of different thermodynamic state properties.
3. Base properties: Provide information about the refrigerant's base properties like the relation between specific enthalpy, specific internal energy, pressure and density.
4. Helmholtz EoS: Provide the records that contain the fitting coefficients for the Helmholtz equation of state.
5. Saturation state properties: Provide the records that contain the fitting coefficients for the thermodynamic state properties at bubble and dew line.
6. Fitted state properties: Provide the records that contain the fitting coefficients for thermodynamic state properties that depend on two independent state properties.
7. Further thermodynamic properties: Provide formulas for further thermodynamic properties like the thermal conductivity or surface tension.

A refrigerant package inherits from PartialHybridTwoPhaseMediumRecord and provides the equations for the refrigerant. Moreover, the PartialHybridTwoPhaseMedium package inherits from PartialMedium and, therefore, the details of this package are described in Modelica.Media.UsersGuide .

References

Sangi, Roozbeh; Jahangiri, Pooyan; Klasing, Freerk; Streblow, Rita; Müller, Dirk (2014): A Medium Model for the Refrigerant Propane for Fast and Accurate Dynamic Simulations. In: The 10th International Modelica Conference. Lund, Sweden, March 10-12, 2014: Linköping University Electronic Press (Linköping Electronic Conference Proceedings), S. 1271–1275

Contents

Name	Description
EoS	Record that contains fitting coefficients of the Helmholtz EoS
BDSP	Record that contains fitting coefficients of the state properties at bubble and dew lines
TSP	Record that contains fitting coefficients of the state properties calculated with two independent state properties
SmoothTransition	Record that contains ranges to calculate a smooth transition between different regions
dynamicViscosity	Calculates dynamic viscosity of refrigerant
thermalConductivity	Calculates thermal conductivity of refrigerant
surfaceTension	Surface tension in two phase region of refrigerant

Revisions

• June 6, 2017, by Mirko Engelpracht, Christian Vering:
  First implementation (see issue 408).