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| IAPWS (International Association for the Properties of Water and Steam) | |
|---|---|
| Name | IAPWS |
| Formation | 1929 |
| Type | International scientific association |
| Purpose | Properties of water and steam |
| Headquarters | Zurich, Switzerland |
| Region served | Worldwide |
| Membership | National committees, technical committees, individual experts |
IAPWS (International Association for the Properties of Water and Steam) is an international association dedicated to the formulation and dissemination of thermophysical properties of water and steam for scientific, engineering, and industrial use. It brings together experts from national laboratories, universities, and industry to produce standardized formulations, technical guidance, and release mechanisms used in power generation, chemical processing, and metrology. The association's work informs standards, codes, and computational tools relied upon by utilities, manufacturers, and research institutions.
IAPWS traces roots to interwar scientific cooperation among Max Planck Institute for Meteorology, National Physical Laboratory (United Kingdom), NIST, Bureau International des Poids et Mesures, and laboratories in Germany, France, and United States. Early conferences involved participants from Royal Society, Deutsches Museum, Institut Pasteur, and the International Union of Geodesy and Geophysics. Post-World War II reconstruction saw collaboration with European Coal and Steel Community, Organisation for Economic Co-operation and Development, and national research councils in United Kingdom, United States, Japan, Soviet Union, and Italy. IAPWS evolved alongside developments at Massachusetts Institute of Technology, Imperial College London, ETH Zurich, and Tokyo Institute of Technology, drawing contributors who had affiliations with Princeton University, University of Cambridge, University of Oxford, California Institute of Technology, and University of Tokyo. Landmark meetings occurred in cities such as Geneva, Vienna, Zurich, Boston, and Tokyo, with influence from figures associated with Royal Society of Edinburgh and Academia dei Lincei.
IAPWS organized national and technical committees with representatives from institutions like Argonne National Laboratory, Sandia National Laboratories, Lawrence Berkeley National Laboratory, Oak Ridge National Laboratory, CERN, Australian National University, CSIRO, Korea Advanced Institute of Science and Technology, and Tsinghua University. Membership includes delegates from European Commission, Ministry of Trade and Industry (Japan), National Research Council (Canada), Fraunhofer Society, Paul Scherrer Institute, and industry stakeholders such as Siemens, General Electric, Mitsubishi Heavy Industries, Hitachi, Alstom, E.ON, EDF, Toshiba, and ABB. The governance structure incorporates working groups with experts from Royal Dutch Shell, BP, ExxonMobil, Chevron, TotalEnergies, and research universities like Johns Hopkins University, Columbia University, University of California, Berkeley, École Polytechnique, Heidelberg University, and Peking University.
IAPWS operates technical committees analogous to panels at International Union of Pure and Applied Chemistry, International Electrotechnical Commission, and International Organization for Standardization, with peer review practices similar to journals like Nature, Science, and Journal of Chemical Physics. Draft releases undergo review by specialists from Met Office, Deutscher Wetterdienst, Météo-France, JMA (Japan Meteorological Agency), National Research Council (Italy), Korean Meteorological Administration, and metrology institutes such as Physikalisch-Technische Bundesanstalt and National Metrology Institute of Japan. Approval requires consensus at plenary meetings attended by representatives from International Energy Agency, World Energy Council, International Atomic Energy Agency, and standards bodies of United Kingdom, United States, Germany, France, and China. IAPWS issues technical guidance, supplementary releases, and updated formulations following deliberations with experts from European Space Agency, NASA, Roscosmos, Indian Space Research Organisation, and national labs.
IAPWS is known for internationally adopted formulations such as the IAPWS-95 industrial formulation, the IAPWS-IF97 steam tables, and the IAPWS Goff–Gratch-like equations, which are cited by agencies including International Electrotechnical Commission, American Society of Mechanical Engineers, ASME Boiler and Pressure Vessel Code, American National Standards Institute, and CEN. Publications and releases are used alongside references from CRC Handbook of Chemistry and Physics, NIST Chemistry WebBook, Handbook of Chemistry and Physics, and technical monographs from Cambridge University Press and Springer Verlag. Authors contributing to IAPWS releases have affiliations with Worcester Polytechnic Institute, University of Wisconsin–Madison, Michigan State University, ETH Zurich, and Delft University of Technology.
IAPWS formulations underpin thermodynamic calculations in power plants operated by companies like EDF Energy, Duke Energy, Tokyo Electric Power Company, Korea Electric Power Corporation, and RWE. They inform design codes adopted by manufacturers such as Westinghouse Electric Company, Babcock & Wilcox, Doosan, and influence simulation software from ANSYS, Siemens Digital Industries Software, AspenTech, COMSOL, and Fluent. Applications extend to research at Los Alamos National Laboratory, Lawrence Livermore National Laboratory, Argonne National Laboratory, and field deployments in geothermal projects in Iceland, New Zealand, and Kenya. IAPWS data support work in desalination plants operated by Veolia, Suez, and Abengoa, as well as in aerospace programs at Boeing and Airbus.
IAPWS collaborates with standards organizations and professional societies including ISO, IEC, ASME, IEEE, CEN, ASTM International, SAE International, Royal Society, Engineering Council, Institution of Mechanical Engineers, and American Institute of Chemical Engineers. Cooperative projects involve research centers such as Max Planck Society, CNRS, CSIC, CERN, Jülich Research Centre, and Rutherford Appleton Laboratory. Liaison relationships exist with international agencies like World Meteorological Organization, United Nations Industrial Development Organization, International Atomic Energy Agency, and International Maritime Organization.
IAPWS has faced scrutiny concerning update cadence and transparency from stakeholders such as consumer advocacy groups, industry consortia, and academic critics at University of Manchester, University of Leeds, and Imperial College London. Debates have surfaced in forums attended by representatives from European Commission, US Department of Energy, Japan Ministry of Economy, Trade and Industry, and environmental NGOs during conferences at COP26 and World Energy Congress. Some engineering firms and software vendors have contested backward compatibility decisions affecting legacy models used by National Grid, TransPower, and regional utilities in California, Germany, and Spain.
Category:Thermophysics Category:Standards organizations Category:Water science