IAPWS Industrial Formulation 1997
For background information about the IAPWS Industrial Formulation 1997 for
the Thermodynamic Properties of Water and Steam (IAPWS-IF97) and references
release and IAPWS
Formulation 2008 for the Viscosity of Ordinary Water Substance.
The IAPWS-IF97 divides the thermodynamic surface
into five regions (see figure below):
- region 1 for the liquid state from low to high pressures,
- region 2 for the vapor and ideal gas state,
- region 3 for the thermodynamic state around the critical point,
- region 4 for the saturation curve (vapor-liquid equilibrium),
- region 5 for high temperatures above 1073.15 K (800 °C) and
pressures up to 10 MPa (100 bar).
Properties of Water and Steam calculator
development. Only properties from basic equations are covered for regions
1, 2 and 3. Backward equations are not implemented. For Region 3 density
must be calculated from pressure with Newton iteration. All regions give
correct verification results.
It seems that not all users realise the kind of software which is
described here. When you calculate properties the program runs on your
machine! Please use view Page source to review the source code
or click this link for fancy listing. This is
NOT external program calculator! That's why it is licensed by the following
Copyright 2001, 2014 Leon Kos, University of Ljubljana
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License , or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
The software is released under GNU General Public License.
University of Ljubljana, Slovenia
Last modified: Fri Jun 13 22:30:50 CEST 2014