Propriétés thermodynamiques du trifluoroéthène (R1123): comportement pρT et équation d'état fondamentale

Translated title of the contribution: Thermodynamic properties of trifluoroethene (R1123): (p, ρ, T) behavior and fundamental equation of state

Ryo Akasaka, Yukihiro Higashi, Naoya Sakoda, Sho Fukuda, Eric W. Lemmon

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The (p, ρ, T) behavior of trifluoroethene (R1123) was investigated with the isochoric method. A total of 87 (p, ρ, T) data were measured along nine isochores (42, 98, 151, 197, 296, 493, 691, 790, and 888 kg · m−3) at temperatures from 300 K to 430 K and pressures up to 6.9 MPa. The uncertainties in temperature are estimated to be within 10 mK below 380 K and 20 mK at higher temperatures, and the uncertainties in pressure are estimated to be within 1 kPa below 380 K and 2 kPa at higher temperatures. The estimated relative uncertainties in the density measurements are 0.15 % or less. A new Helmholtz energy equation of state was formulated based on the (p, ρ, T) data and recently published experimental data for the vapor pressure, liquid and vapor densities including those at saturation, vapor-phase sound speed, and ideal-gas isobaric heat capacity. The equation is applicable at temperatures from the triple-point temperature (195.15 K) to 480 K and pressures up to 20 MPa. Typical uncertainties in calculated properties are 0.1 % for vapor pressures, 0.1 % for liquid densities, and 0.2 % for vapor densities, except in the critical region where larger deviations up to about 1.5 % are sometimes observed in densities. The uncertainties in calculated vapor-phase sound speeds and ideal-gas isobaric heat capacities are 0.03 % and 1 %, respectively. The equation shows reasonable extrapolation behavior at extremely low and high temperatures, and at high pressures.

Translated title of the contributionThermodynamic properties of trifluoroethene (R1123): (p, ρ, T) behavior and fundamental equation of state
Original languageFrench
Pages (from-to)457-467
Number of pages11
JournalInternational Journal of Refrigeration
Volume119
DOIs
Publication statusPublished - Nov 2020

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Mechanical Engineering

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