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PUBLICATIONS

An Equation of State for the Thermodynamic Properties of Helium

Published

Author(s)

Diego Ortiz Vega, Kenneth Hall, James Holste, Allan H. Harvey, Eric W. Lemmon

Abstract

This report documents the equation of state for fluid helium implemented in Version 10 of NIST's REFPROP Standard Reference Database. The equation of state is expressed as the molar Helmholtz energy as a function of temperature and density, and is valid for the normal fluid (helium I) up to 1500 K and 2000 MPa. Limited comparisons with experimental data and with virial coefficients calculated by ab initio methods are provided.
Citation
NIST Interagency/Internal Report (NISTIR) - 8474
Report Number
8474
NIST Pub Series
NIST Interagency/Internal Report (NISTIR)
Pub Type
NIST Pubs

Download Paper

https://doi.org/10.6028/NIST.IR.8474
Local Download

Keywords

equation of state, helium, thermodynamic properties, virial coefficients
Thermodynamics and Chemical thermodynamics and chemical properties

Citation

Ortiz Vega, D. , Hall, K. , Holste, J. , Harvey, A. and Lemmon, E. (2023), An Equation of State for the Thermodynamic Properties of Helium, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.IR.8474, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=956186 (Accessed October 13, 2025)

Issues

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Created August 10, 2023, Updated November 6, 2023
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