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Thermodynamic surface of argon in terms of renormalization group theory for asymmetric model

DOI: 10.17586/1606-4313-2023-22-3-61-67
UDC 536.71

Thermodynamic surface of argon in terms of renormalization group theory for asymmetric model

Rykov S.V. , Kudryavtseva I.V. , Rykov V.A., Popov Petr V., Solomichev Roman I., Rykov S.A.

For citation: Rykov S.V., Kudryavtseva I.V., Rykov V.A., Popov P.V., Solomichev R.I., Rykov S.A. Thermodynamic surface of argon in terms of renormalization group theory for asymmetric model. Journal of International Academy of Refrigeration. 2023. No 3. p. 61-67. DOI: 10.17586/1606-4313-2023-22-3-61-67

Abstract
A single fundamental equation of state has been developed. The equation meets the criteria for fundamental equations of state and takes into account the asymmetry of liquid-gas system in accordance with modern theory of critical point. The equation has been tested on the description of thermodynamic surface of argon for which a great amount of high-precision experimental data for a variety of state parameters is available. On the basis of statistics including AAD, BIAS and RSM, the proposed equation has been compared with international fundamental equation of state for argon (Tegeler et al.,1999). The proposed equation has been shown to allow obtaining precise data on thermodynamic properties of argon, which is sufficient to develop high-precision instruments, gas analyzers in particular.

Keywords: equation of state, pressure, density, argon, renormalization group, scale theory.

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