Thermophysical properties of seawater

Description

This page provides tables and a library of computational routines for the thermophysical properties of seawater including:

These properties are those needed for design of thermal and membrane desalination processes. They are given as functions of temperature and salinity. The pressure is taken as atmospheric pressure (0.1 MPa) up to the saturation temperature and at saturation pressure for higher temperatures. The temperature and salinity ranges are 0 - 120 degC and 0 - 120 g/kg respectively.

Details about the source, validity and accuracy of each property function can be found in:
Mostafa H. Sharqawy, John H. Lienhard V, and Syed M. Zubair, "Thermophysical properties of seawater: A review of existing correlations and data," Desalination and Water Treatment, Vol. 16, pp.354-380, April 2010. (PDF file) Includes corrections through July 2012.

The seawater properties library routines are available in MATLAB, EES, and JACOBIAN formats. They are a self contained library and are extremely easy to use. They will run on all computers that support MATLAB, EES, or JACOBIAN.

This software is provided "as is" without warranty of any kind. See the file sw_copy.m for conditions of use and licence.

Downloads

Installation

For MATLAB:

For EES:

Property Functions

Property (unit) Temperature, T (degC) Salinity, S (g/kg) Function name
Density (kg/m3) 0 - 180 0 - 160 SW_Density(T,S)
Specific heat capacity (J/kg.K) 0 - 180 0 - 180 SW_SpcHeat(T,S)
Thermal conductivity (W/m.K) 0 - 180 0 - 160 SW_Conductivity(T,S)
Dynamic viscosity (kg/m.s) 0 - 180 0 - 150 SW_Viscosity(T,S)
Surface tension (N/m) 0 - 40 0 - 40 SW_SurfaceTension(T,S)
Vapor pressure (kPa) 0 - 200 0 - 240 SW_Psat(T,S)
Boiling point elevation (K) 0 - 200 0 - 120 SW_BPE(T,S)
Latent heat of vaporization (J/kg) 0 - 200 0 - 240 SW_LatentHeat(T,S)
Specific enthalpy (J/kg) 10 - 120 0 - 120 SW_Enthalpy(T,S)
Specific entropy (J/kg.K) 10 - 120 0 - 120 SW_Entropy(T,S)
Specific Gibbs energy (J/kg) 10 - 120 0 - 120 SW_Gibbs(T,S)
Specific flow exergy (J/kg) 10 - 120 0 - 120 SW_Exergy(T,S,T0,S0)*
Osmotic coefficient 0 - 200 10 - 120 SW_Osmotic(T,S)
Chemical potential of water (J/kg) 10 - 120 0 - 120 ChemPot_W(T,S)
Chemical potential of salts (J/kg) 10 - 120 0 - 120 ChemPot_S(T,S)
Thermal diffusivity (m2/s) 0 - 180 0 - 160 SW_Diffusivity(T,S)
Specific internal energy (J/kg) 10 - 120 0 - 120 SW_IntEnergy(T,S)
Kinematic viscosity (m2/s) 0 - 180 0 - 150 SW_Kviscosity(T,S)
Prandtl number 0 - 180 0 - 150 SW_Prandtl(T,S)
Specific volume (m3/kg) 0 - 180 0 - 160 SW_Volume(T,S)

*T0 and S0 are reference temperature and salinity, the default is T0 = 25 degC and S0 = 35 g/kg