Partager

Équation d’état de l’énergie de Helmholtz pour le trifluoroéthylène (R-1123).

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

Numéro : pap. 2297

Auteurs : FUKUSHIMA M., LEMMON E. W., AKASAKA R.

Résumé

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.

Documents disponibles

Format PDF

Pages : 10

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : A helmholtz energy equation of state for trifluoroethylene (R-1123).
  • Identifiant de la fiche : 30018949
  • Langues : Anglais
  • Source : 2016 Purdue Conferences. 16th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 11/07/2016

Liens


Voir d'autres communications du même compte rendu (274)
Voir le compte rendu de la conférence

Indexation