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Based upon the International Association for the Properties of Water and Steam (IAPWS) 1995 formulation for general and scientific use for the thermodynamic properties of water, this updated version provides water properties from the international standards over a wide range of conditions. Version 3.0 incorporates new IAPWS standards adopted in 2008 for the viscosity and for the melting and sublimation curves and in 2011 for the thermal conductivity.
The thermophysical properties included in the STEAM Database are:
|• temperature||• Helmholtz energy||• thermodynamic|
|• pressure||• Gibbs energy||derivatives|
|• density||• fugacity||• thermal conductivity|
|• volume||• isothermal||• viscosity|
|• quality||compressibility||• dielectric constant|
|• enthalpy||• volume expansivity||• dielectric derivatives|
|• internal energy||• speed of sound||• Debye-Hückel slopes|
|• entropy||• Joule-Thomson||• refractive index|
|• Cv||coefficient||• surface tension|
|•Cp||• Prandtl number||• Kinematic viscosity|
|• Ionization constant (pKw)||• Virial Coefficients||• Exergy|
Using a Windows® interface, the STEAM database generates tables and plots of property values at specified conditions corresponding to saturation conditions, a fixed property value (isotherm, isobar, etc.), or individual values of two independent variables. Vapor-liquid, vapor-solid, and liquid-solid saturation calculations with either temperature or pressure specified are available. The user can specify which properties to display and the units in which to enter and display data. Additional features include an interactive on-line help system, the ability to plot calculated points and a wide variety of thermodynamic diagrams, and the capability to copy and paste data to and from other applications.
Source code: The FORTRAN subroutines and associated data files are provided for those wishing to access NIST-10 calculations from their own applications.
Excel spreadsheets: A sample spreadsheet is included that demonstrates how the DLL can be linked to Excel. Most properties that are available in the graphical interface can also be calculated in the spreadsheet.
System Requirements: PC running Windows® XP, 7, 8, or 10; 10.0 MB available hard disk operating system.
Please click here to view the PDF version of Users' Guide.
A NIST Report is available with tables of thermodynamic properties (steam tables) computed from this database.
Further information, please contact:
Standard Reference Data Program
National Institute of Standards and Technology
(844) 374-0183 (Toll Free)
The scientific contact for this database is:
Allan H. Harvey
NIST Mailcode 647 325 Broadway
Boulder, CO 80305
Phone: (303) 497-3555
E-mail: aharvey [at] boulder.nist.gov
Keywords: Computerized database, equation of state, properties of water, steam, thermodynamic properties, steam tables, thermophysical properties, transport properties, water.