.AixLib.Media.Refrigerants.R290.R290_IIR_P05_30_T263_343_Horner

Information

This package provides a refrigerant model for R290 using a hybrid approach developed by Sangi et al.. The hybrid approach is implemented in AixLib.Media.Refrigerants.Interfaces.PartialHybridTwoPhaseMediumRecord and the refrigerant model is implemented by complete the template AixLib.Media.Refrigerants.Interfaces.TemplateHybridTwoPhaseMediumRecord .

Assumptions and limitations

The implemented coefficients are fitted to external data by Sangi et al. and are valid within the following range:

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Parameter

Minimum Value

Maximum Value

Pressure (p) in bar

0.5

30

Temperature (T) in K

263.15

343.15

Validation

Sangi et al. validated their model by comparing it to results obtained from the Helmholtz equation of state. They found out that relative error of the refrigerant model compared to HelmholtzMedia (Thorade and Saadat, 2012) is close to zero.

References

Thorade, Matthis; Saadat, Ali (2012): HelmholtzMedia - A fluid properties library. In: Proceedings of the 9th International Modelica Conference; September 3-5; 2012; Munich; Germany. Linköping University Electronic Press, S. 63–70.

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

Klasing,Freerk: A New Design for Direct Exchange Geothermal Heat Pumps - Modeling, Simulation and Exergy Analysis. Master thesis

Scalabrin, G.; Marchi, P.; Span, R. (2006): A Reference Multiparameter Viscosity Equation for Propane with an Optimized Functional Form. In: J. Phys. Chem. Ref. Data, Vol. 35, No. 3, S. 1415-1442

Contents

NameDescription
 SmoothTransitionRecord that contains ranges to calculate a smooth transition between different regions
 f_IdgDimensionless Helmholtz energy (Ideal gas contribution alpha_0)
 f_ResDimensionless Helmholtz energy (Residual part alpha_r)
 t_fIdg_tShort form for tau*(dalpha_0/dtau)_delta=const
 tt_fIdg_ttShort form for tau*tau*(ddalpha_0/(dtau*dtau))_delta=const
 t_fRes_tShort form for tau*(dalpha_r/dtau)_delta=const
 tt_fRes_ttShort form for tau*tau*(ddalpha_r/(dtau*dtau))_delta=const
 d_fRes_dShort form for delta*(dalpha_r/(ddelta))_tau=const
 dd_fRes_ddShort form for delta*delta(ddalpha_r/(ddelta*delta))_tau=const
 td_fRes_tdShort form for tau*delta*(ddalpha_r/(dtau*ddelta))
 ttt_fIdg_tttShort form for tau*tau*tau*(dddalpha_0/(dtau*dtau*dtau))_delta=const
 ttt_fRes_tttShort form for tau*tau*tau*(dddalpha_r/(dtau*dtau*dtau))_delta=const
 ddd_fRes_dddShort form for delta*delta*delta* (dddalpha_r/(ddelta*ddelta*ddelta))_tau=const
 tdd_fRes_tddShort form for tau*delta*delta*(dddalpha_r/(dtau*ddelta*ddelta))
 ttd_fRes_ttdShort form for tau*tau*delta*(dddalpha_r/(dtau*dtau*ddelta))
 saturationPressureSaturation pressure of refrigerant (Ancillary equation)
 saturationTemperatureSaturation temperature of refrigerant (Ancillary equation)
 bubbleDensityBoiling curve specific density of refrigerant (Ancillary equation)
 dewDensityDew curve specific density of refrigerant (Ancillary equation)
 bubbleEnthalpyBoiling curve specific enthalpy of refrigerant (Ancillary equation)
 dewEnthalpyDew curve specific enthalpy of refrigerant (Ancillary equation)
 bubbleEntropyBoiling curve specific entropy of refrigerant (Ancillary equation)
 dewEntropyDew curve specific entropy of propane (Ancillary equation)
 temperature_phCalculates temperature as function of pressure and specific enthalpy
 temperature_psCalculates temperature as function of pressure and specific entroy
 density_pTComputes density as a function of pressure and temperature
 dynamicViscosityCalculates dynamic viscosity of refrigerant
 thermalConductivityCalculates thermal conductivity of refrigerant
 surfaceTensionSurface tension in two phase region of refrigerant

Revisions


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