Reference Correlations for Thermophysical Properties of Liquid Water at 0.1  MPa

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Simple but highly accurate correlations have been developed for the thermodynamic properties (including density, heat capacity, and speed of sound), viscosity, thermal conductivity, and static dielectric constant of liquid water as a function of temperature at a pressure of 0.1  MPa. The calculations may be simply extended to a pressure range from the saturation pressure to 0.3  MPa. The temperature range covered in most cases is from 253.15  to  383.15  K; this includes some temperatures where liquid water is metastable. These correlations are designed to reproduce the best available data, which in most cases are described by formulations issued by the International Association for the Properties of Water and Steam (IAPWS). The equations presented here are simple enough to be used in applications such as spreadsheets. They provide a convenient alternative to the more complicated IAPWS formulations in cases where only liquid properties at near-atmospheric pressure are of interest without increasing the uncertainty beyond that of the more complex formulations. ©2009 American Institute of Physics