Abstract
Online publication of IAPWS formulations for calculation of the properties of water and steam is reviewed. The advantages of electronic delivery via Internet over traditional publication on paper are examined. Online calculation can be used with or without formulas or equations printed in traditional publications. Online calculations should preferably free of charge and compatible across multiple platforms (Windows, Android, Linux). Other requirements include availability of multilingual interface, traditional math operators and functions, 2D and 3D graphic capabilities, animation, numerical and symbolic math, tools for solving equation systems, local functions, etc. Using of online visualization tools for verification of functions for calculating thermophysical properties of substances is reviewed. Specific examples are provided of tools for the modeling of the properties of chemical substances, including desktop and online calculation software, downloadable online calculations, and calculations that use server technologies such as Mathcad Calculation Server (see the site of National Research University “Moscow Power Engineering Institute”) and SMath (see the site of Knovel, an Elsevier company).
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