In this record, fitting coefficients are provided for the Helmholtz equation of state (EoS). For detailed information of the EoS as well as the fitting coefficients, please checkout AixLib.DataBase.Media.Refrigerants.HelmholtzEquationOfStateBaseDateDefinition . The fitting coefficients are used in a hybrid refrigerant model provided in AixLib.Media.Refrigerants. For detailed information, please checkout AixLib.Media.Refrigerants.Interfaces.TemplateHybridTwoPhaseMediumRecord.
The provided coefficients are fitted to external data by Engelpracht
and are valid within the following range:
Parameter |
Minimum Value |
Maximum Value |
Pressure (p) in bar |
1 |
39.5 |
Temperature (T) in K |
233.15 |
370.15 |
The reference point is defined as 200 kJ/kg and 1 kJ/kg/K, respectively, for enthalpy and entropy for the saturated liquid at 273.15 K.
Engelpracht, Mirko (2017): Development of modular and scalable simulation models for heat pumps and chillers considering various refrigerants. Master Thesis