Since
1967, the industry standard for the thermodynamic properties of
steam and water has been the IAPWS "1967 IFC-Formulations for
Industrial Use". These formulations have been the basis for
the American Society of Mechanical Engineers (ASME) steam tables.
In
1995, The International Association for the Properties of Water
and Steam (IAPWS) released a new formulation for scientific use
called the "IAPWS Formulation 1995 for the Thermodynamic
Properties of Ordinary Water Substance for General and Scientific
Use", otherwise known as the IAPWS-95 formulation.
The
exact formulation is developed and programmed in
The FLOW CONSULTANT ™,
not the approximation region equations given in IAPWS Industrial
use version (`1997)
The
following web site provides additional information:
http://www.iapws.org/