packageCarboHSP_ph
Extends from Modelica.Media.Interfaces.PartialMedium (Partial medium properties (base package of all media packages)).
Information
Calculation of thermo-physical properties for pure solid CarboHSP particle in the temperature region of 50 to 1100 degC. CarboHSP can used in falling particle CSP central receiver systems as heat transfer carrier and storage medium.
This package of thermodynamic properties is explicit for pressure and temperature.
These correlations have been obtained by integration of (cp dT) to obtain enthalpy, and integration of (cp/T dT) to obtain entropy. Integration constants are added so that h and s evaluate to zero at T = 298.15 K (i.e. 25 degC).
Restriction
The functions provided by this package shall be used inside of the restricted limits according to the referenced literature.
- 50 degC ≤ T ≤ 1100 degC
- Explicit for pressure and temperature.
References
Albrecht, K.J. and Ho, C.K, 'Design and operating considerations for a shell-and-plate, moving packed-bed, particle-to-sCO2 heat exchanger', Solar Energy 178 (2019) 331-340. Retrieved from https://bit.ly/2GbWHTM
Siegel, N.P. et al., 'Development and Evaluation of a Prototype Solid Particle Receiver: On-Sun Testing and Model Validation', Journal of Solar Energy Engineering 132 (2010) 021008. Retrieved from https://bit.ly/2RFgEUz
Siegel, N.P. et al., 'The Development of Direct Absorption and Storage Media for Falling Particle Solar Central Receivers', Journal of Solar Energy Engineering 137 (2015) 041003. Retrieved from https://bit.ly/2UMc3lx
CARBO Company's website. Retreived from https://bit.ly/2GbWHTM
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Media.Interfaces.Choices.IndependentVariables | ThermoStates (from PartialMedium) | Enumeration type for independent variables | |
| String | mediumName (from PartialMedium) | "unusablePartialMedium" | Name of the medium |
| String[:] | substanceNames (from PartialMedium) | {mediumName} | Names of the mixture substances. Set substanceNames={mediumName} if only one substance. |
| String[:] | extraPropertiesNames (from PartialMedium) | fill("", 0) | Names of the additional (extra) transported properties. Set extraPropertiesNames=fill("",0) if unused |
| Boolean | singleState (from PartialMedium) | = true, if u and d are not a function of pressure | |
| Boolean | reducedX (from PartialMedium) | true | = true, if medium contains the equation sum(X) = 1.0; set reducedX=true, if only one substance (see docu for details) |
| Boolean | fixedX (from PartialMedium) | false | = true, if medium contains the equation X = reference_X |
| AbsolutePressure | reference_p (from PartialMedium) | 101325 | Reference pressure of Medium: default 1 atmosphere |
| Temperature | reference_T (from PartialMedium) | 298.15 | Reference temperature of Medium: default 25 deg Celsius |
| MassFraction[nX] | reference_X (from PartialMedium) | fill(1/nX, nX) | Default mass fractions of medium |
| AbsolutePressure | p_default (from PartialMedium) | 101325 | Default value for pressure of medium (for initialization) |
| Temperature | T_default (from PartialMedium) | Modelica.Units.Conversions.from_degC(20) | Default value for temperature of medium (for initialization) |
| SpecificEnthalpy | h_default (from PartialMedium) | specificEnthalpy_pTX(p_default, T_default, X_default) | Default value for specific enthalpy of medium (for initialization) |
| MassFraction[nX] | X_default (from PartialMedium) | reference_X | Default value for mass fractions of medium (for initialization) |
| ExtraProperty[nC] | C_default (from PartialMedium) | fill(0, nC) | Default value for trace substances of medium (for initialization) |
| Integer | nS (from PartialMedium) | size(substanceNames, 1) | Number of substances |
| Integer | nX (from PartialMedium) | nS | Number of mass fractions |
| Integer | nXi (from PartialMedium) | if fixedX then 0 else if reducedX then nS - 1 else nS | Number of structurally independent mass fractions (see docu for details) |
| Integer | nC (from PartialMedium) | size(extraPropertiesNames, 1) | Number of extra (outside of standard mass-balance) transported properties |
| Real[nC] | C_nominal (from PartialMedium) | 1.0e-6*ones(nC) | Default for the nominal values for the extra properties |
Contents
| Name | Description |
|---|---|
 ThermodynamicState | A selection of variables that uniquely defines the thermodynamic state |
 BaseProperties | Base properties of medium |
 setState_pTX | Return thermodynamic state from p, T, and X or Xi |
 setState_phX | Return thermodynamic state from p, h, and X or Xi |
 setState_dTX | Return thermodynamic state from d, T, and X or Xi |
 pressure | Return pressure |
 temperature | Return temperature |
 specificEnthalpy | Return specific enthalpy |
 density | Return density |
 specificInternalEnergy | Return specific internal energy |
 thermalConductivity | Return thermal conductivity |
 specificEntropy | Return specific entropy |
 specificGibbsEnergy | Return specific Gibbs energy |
 specificHelmholtzEnergy | Return specific Helmholtz energy |
 specificHeatCapacityCp | Return specific heat capacity at constant pressure |
 specificHeatCapacityCv | Return specific heat capacity at constant volume |
 isentropicEnthalpy | Return isentropic enthalpy |
 density_derT_p | Return density derivative w.r.t. temperature at constant pressure |