.BrineProp

Information

BrineProp is a modelica package that calculates the thermodynamic properties of a specified brine, i.e. an aqueous solution of salts and gases, with a potential gas phase, including degassing/evaporation and solution/condensation.

It was developed as a part of a PhD projected, documented in the thesis "Thermo-hydraulic model of the two-phase flow in the brine circuit of a geothermal power plant".

This package contains an extension of the Modelica.Media interfaces for two-phase mixtures (PartialMixtureTwoPhaseMedium), the generic brine template with the vapour-liquid-equilibrium calculation (PartialBrine_ngas_Newton), as well specific brine models for NaCl, KCl, CaCl2, [MgCl2, SrCl2 partially supported] (1-phase: Brine_5salts) and CO2, N2 and CH4 (2-phase: Brine_5salts_TwoPhase_3gas).

This package has been developed and tested in Dymola up to 2020x MSL 3.2.3 (See "Known issues").

Licensed by the Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences under the Modelica License 2

This Modelica package is free software and the use is completely at your own risk; it can be redistributed and/or modified under the terms of the Modelica License 2. For license conditions (including the disclaimer of warranty) see Modelica.UsersGuide.ModelicaLicense2 or visit http://www.modelica.org/licenses/ModelicaLicense2.

Usage

set Advanced.PedanticModelica:=false;

Check the (non-partial) Brine packages (Brine_5salts, BrineGas_3Gas or Brine_5salts_TwoPhase_3gas) for instructions or run models from BrineProp/Examples.

All calculated values are returned in SI-Units and are mass based.

Known issues:

does not run with PedanticMode
no differentials implemented
1phase-transient calculation does not compile, supposedly due to missing derivatives
To switch from MSL 3.2 to MSL 3.2.1 (un)comment code in PartialMixtureTwoPhaseMedium to avoid warnings
To switch from MSL 3.2.1 to MSL 3.2 (un)comment code in PartialMixtureTwoPhaseMedium to avoid errors
not fully compatible to OpenModelica(check OK, errors at compiling or simulation)
not fully compatible to JModelica (String arguments not fully supported)

Compatibilty:

	OpenModelica 1.9.1 beta2	JModelica 1.14
SingleSaltBrine	check	?
BrineProps1PhaseMinimal	check	?
BrineProps1PhaseFull	check	?
BrineGas	check, compile w/ warning	?
PureWaterMinimal	check, compile, simulate	error
PureWaterFlashing	check	?
BrineProps2PhaseMinimal	check	?
BrineProps2phaseFull	check	?
BrineProps2PhaseMinimal_state	check	?
ConvertBrineComposition	check	?

TODO:

clean up examples, use all features in full example
add plot scripts
implement differentials
remove argument MM_vec in property functions
implement limit ignore switches consistently
make SingleSalt correlations usable separately
Add apparent molar heat capacity/enthalpy for (NaCl,) MgCl2 and SrCl2

Created by

Henning Francke (francke@gfz-potsdam.de)

Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences

Telegrafenberg, D-14473 Potsdam, Germany

Name	Description
UsersGuide
Examples	Usage examples
Utilities
SaltData	Molar masses and mole numbers of the contained salts
SaltDataDuan	Coefficients used in Duan density calculation
Densities	Density functions
SpecificEnthalpies	Enthalpy functions
Viscosities	Viscosity functions
Resistivities
Types	Definition of additional units used in BrineProp
PartialFlags
PartialBrineMultiSaltOnePhase	Template medium for one-phase aqueous solution of m Salts and n Gases based on PartialMediaMixtureMedium
ComponentsOrder	to be defined in actual Medium package
BrineDriesner	NaCl solution using Driesner density and enthalpy function
BrineDuan	NaCl solution using Duan density
Brine3salts	One-phase (liquid) multisalt brine solution
Brine5salts
GasData	Molar masses and ion numbers of gases
PartialBrineGas	Medium template for gas mixture of nX_gas gases and water based on PartialMixtureMedium
BrineGas3Gas	Gas mixture of CO2+N2+CH4+H2O
BrineGas4Gas	"Gas mixture of CO2+N2+CH4+H2+H2O"
Vacuum	Medium with zero properties
PartialMixtureTwoPhaseMedium	Template class for two phase medium of a mixture of substances
WaterMixtureTwoPhase_pT	(incomplete) Water model from Modelica.Media compatible to PartialMixtureTwoPhaseMedium (Example use)
PartialBrineMultiSaltMultiGasTwoPhase	Template medium for aqueous solutions of m Salts and n Gases, VLE solved by Newton's method
Brine3salts3gas	Two-phase aqueous solution of NaCl, KCl, CaCl2, N2, CO2, CH4
Brine5salts3gas	Two-phase aqueous solution of NaCl, KCl, CaCl2, N2, CO2, CH4
Brine3salts4gas	Two-phase aqueous solution of NaCl, KCl, CaCl2, N2, CO2, CH4, H2