.SolarTherm.Media.Sodium.Sodium_pT

Information

Calculation of fluid properties for pure liquid sodium in the fluid region of 370 to 1154 Kelvin. Sodium is used in solar thermal systems due to the wide range of operating temperature it offers and its high thermal conductivity.

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 (Ref: Pye, 2015).

Restriction

The functions provided by this package shall be used inside of the restricted limits according to the referenced literature.

• 370 Kelvin ≤ T ≤ 1154 Kelvin
• Explicit for pressure and temperature.

References

Fink, J. & Leibowitz, L. (1995). 'Thermodynamic and transport properties of sodium liquid and vapour', Technical Report ANL/RE-95/2, Reactor Engineering Division, Argonne National Laboratories. Retrieved from http://www.ne.anl.gov/eda/ANL-RE-95-2.pdf

Pye, J. (2015). 'Model of liquid sodium properties'. Retreived from http://code.ascend4.org/ascend/trunk/models/johnpye/liquidsodium.a4c

Contents

Name	Description
ThermodynamicState	A selection of variables that uniquely defines the thermodynamic state
BaseProperties	Base properties of medium
setState_pTX	Return thermodynamic state as function of p, T and composition X or Xi
setState_phX	Return thermodynamic state as function of p, h and composition X or Xi
setState_psX	Return thermodynamic state as function of p, s and composition X or Xi
setState_dTX	Return thermodynamic state as function of d, T and composition X or Xi
pressure	Return pressure
temperature	Return temperature
specificEnthalpy	Return specific enthalpy
density	Return density
specificInternalEnergy	Return specific internal energy
dynamicViscosity	Return dynamic viscosity
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
isentropicExponent	Return isentropic exponent
isentropicEnthalpy	Return isentropic enthalpy
velocityOfSound	Return velocity of sound
isobaricExpansionCoefficient	Return overall the isobaric expansion coefficient beta
isothermalCompressibility	Return overall the isothermal compressibility factor
enthalpyOfVaporization	Return vaporization enthalpy of condensing fluid
density_derT_p	Return density derivative w.r.t. temperature at constant pressure