Equations of state for the thermodynamic properties of binary mixtures for helium-4, neon, and argon

Jakub Tkaczuk (1) , Ian Bell (2) , Eric W Lemmon (2) , Nicolas Luchier (3) , François Millet (1)

1 LCF - Laboratoire de Cryogénie pour la Fusion
2 NIST - National Institute of Standards and Technology [Boulder]
3 L3C - Laboratoire de Calculs et Conception Cryogénique

Based upon the conceptual design reports for the Future Circular Collider cryogenic system, the need for more accurate thermodynamic property models of cryogenic mixtures of noble gases was identified. Both academic institutes and industries have identified the lack of a reliable equation of state for mixtures used at very low temperatures. Detailed cryogenic architecture modeling and design cannot be carried out without accurate fluid properties. Therefore, the helium-neon equation was the first goal of this work and it was further extended to other fluids beneficial for scientific and industrial applications beyond the particle physics needs. The properties of the noble gas mixtures of helium-neon, neon-argon, and helium-argon are accurately modeled with the equations of state explicit in the Helmholtz energy.

Mots clés: helium-4; neon; argon; equation of state; fundamental equation; thermodynamic properties

Domaines: Physique [physics]; Matière Condensée [cond-mat]; Science des matériaux [cond-mat.mtrl-sci]

Jakub Tkaczuk, Ian Bell, Eric W Lemmon, Nicolas Luchier, François Millet. Equations of state for the thermodynamic properties of binary mixtures for helium-4, neon, and argon. Journal of Physical and Chemical Reference Data, 2020, 49, pp.023101. ⟨10.1063/1.5142275⟩. ⟨hal-02893227⟩