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A helmholtz energy equation of state for trifluoroethylene (R-1123).

Number: pap. 2297

Author(s) : FUKUSHIMA M., LEMMON E. W., AKASAKA R.

Summary

A first fundamental equation of state in the Helmholtz energy is presented for trifluoroethylene (R-1123). The independent variables of the equation of state are temperature and density. Following recent trends in the development of accurate equations of state, a functional form that includes Gaussian bell-shapped terms is optimized with the use of nonlinear least-squares fitting to the experimental data. The equation is valid for temperature from 250k to 480k and for pressure up to 10MPa. Typical uncertainties over the range of validity are 0.1% for vapor pressures, 0.2% for liqid densities, and 1% for vapor densities, except in the critical region where larger deviations up to about 2% are observed in densities. At temperatures below 300K, deviations in vapor pressures are larger due to insufficient amount of experimental data. The equation shows reasonable extrapolation behavior in regions away from the experimental data.

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Pages: 10

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Details

  • Original title: A helmholtz energy equation of state for trifluoroethylene (R-1123).
  • Record ID : 30018949
  • Languages: English
  • Source: 2016 Purdue Conferences. 16th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2016/07/11

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