A rigorous thermodynamic property model for fluid-phase 1,1-difluoroethane (R-152a)

I. M. Astina, H. Sato

研究成果: Article査読

5 被引用数 (Scopus)

抄録

A new thermodynamic property model for the Helmholtz free energy with rational third virial coefficients for fluid-phase 1,1-difluoroethane (R-152a) was developed. The model was validated by existing experimental data for temperatures from the triple point to 450 K and pressures up to 60 MPa. Reasonable behavior of the second and third virial coefficients was confirmed from intermolecular potential models. The estimated uncertainties are 0.1% in density for the gaseous and liquid phases, 0.4% in density for the supercritical region, 0.05% in speed of sound for the gaseous phase, 2% in speed of sound for the liquid phase, and 1% in specific heat capacities for the liquid phase. From the reasonable behavior of the ideal curves and the third virial coefficients, the model can be assumed reliable in representing the thermodynamic properties not only at states with available experimental data but also at states for which no experimental data are available.

本文言語English
ページ(範囲)1713-1733
ページ数21
ジャーナルInternational Journal of Thermophysics
25
6
DOI
出版ステータスPublished - 2004 11 1

ASJC Scopus subject areas

  • Condensed Matter Physics

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