packageTemplateHybridTwoPhaseMediumRecord
Extends from AixLib.Media.Refrigerants.Interfaces.PartialHybridTwoPhaseMediumRecord.
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:
- Fluid constants: Provide basic information of the refrigerant and add the reference.
- Basic information: Provide basic information like the refrigerant name and its valid fluid limits in terms of different thermodynamic state properties.
- Base properties: Provide information about the refrigerant's base properties like the relation between specific enthalpy, specific internal energy, pressure and density.
- Helmholtz EoS: Provide the records that contain the fitting coefficients for the Helmholtz equation of state.
- Saturation state properties: Provide the records that contain the fitting coefficients for the thermodynamic state properties at bubble and dew line.
- Fitted state properties: Provide the records that contain the fitting coefficients for thermodynamic state properties that depend on two independent state properties.
- 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
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Media.Interfaces.PartialTwoPhaseMedium.FluidConstants | refrigerantConstants | Thermodynamic constants for refrigerant |
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).