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Supplementary Release on Properties of Liquid Water at 0.1 MPa

Developed by Russian National Committee (RNC) of

International Association for the Properties of Water and Steam (IAPWS).

This calculation page is based on the

"Revised Supplementary Release on Properties of Liquid Water at 0.1 MPa" [1]

provided by IAPWS.

Detailed information about used equations, constants, range of validity etc is presented in PDF version of IAPWS Release which can be downloaded from IAPWS web site www.iapws.org

Authors (and responsible persons):

Moscow Power Engineering Institute (MPEI). Last update: 2012/09/29

Note that displayed last digits depends on numeric implementation of underlying formulations.

Input parameters

Formulation reference values

Dimensionless input parameters

Main equations

The specific Gibbs energy is represented by the equation

Eq. (1) in [1]

The specific volume is represented by the equation

Eq. (2) in [1]

The isothermal derivative of specific volume with respect to pressure is represented by the equation

Eq. (3) in [1]

Thermodynamic properties of liquid water at 0.1 MPa

Coefficients from Table 1 [1] (can be downloaded here in text format):

The specific Gibbs energy

The specific volume

The density

The isothermal derivative of specific volume with respect to pressure

The specific entropy

Derived from Eq. (1) in [1]

The specific isobaric heat capacity

The isothermal derivative of specific volume with respect to temperature

Derived from Eq. (2) in [1]

The specific enthalpy

The specific internal energy

The specific Helmholtz energy

The specific isochoric heat capacity

The isothermal compressibility

Thermal expansivity

The isentropic compressibility

Speed of sound

Additional derivatives used for computing properties at pressures different from 0.1 MPa

Derived from Eq. (3) in [1]

Viscosity of liquid water at 0.1 MPa

Coefficients from Table 5 [1] (can be downloaded here in text format):

Extracting data to vectors:

The viscosity of liquid water at 0.1 MPa

Eq. (7) in [1]

Thermal Conductivity of liquid water at 0.1 MPa

Coefficients from Table 6 [1] (can be downloaded here in text format):

The thermal conductivity of liquid water at 0.1 MPa

Eq. (8) in [1]

Static Dielectric Constant of liquid water at 0.1 MPa

Coefficients from Table 7 [1] (can be downloaded here in text format):

The static dielectric constant of liquid water at 0.1 MPa

Eq. (9) in [1]

Additional input parameters (for calculations at other pressure)

Estimation of thermodynamic properties of liquid water at other pressure

Eq. from Table 4 in [1]

References

1. Revised Supplementary Release on Properties of Liquid Water at 0.1 MPa. Plzeň, Czech Republic September 2011, available at http://www.iapws.org