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Les propriétés thermodynamiques de propane : du p-rhô-T à l'équation d'état.

The thermodynamic properties of propane: from p-rho-T to the equation of state.

Auteurs : MCLINDEN M. O., LEMMON E. W.

Résumé

The p-rho-T behaviour of high-purity (99.999%) propane was measured from 265 to 500 K with pressures to 36 MPa using a two-sinker densimeter. The measurements extend from low-density vapour to compressed liquid states, and the near-critical region was covered extensively. Vapour pressures from 265 to 369 K have also been measured. The apparatus is described and the uncertainties in the measurements are discussed. These data, together with new heat capacity data measured at NIST and carefully selected literature data, have been used to develop an equation of state (EOS) valid over the entire fluid region from the triple point temperature of 85.528 to 520 K with pressures to 1000 MPa. The equation is written in terms of the Helmholtz energy and includes special terms to describe the critical region. This EOS is among the most accurate for any fluid, and the new data were crucial in its development. The EOS exhibits proper extrapolation behaviour to high temperatures and pressures. It will serve as a reference fluid for the fitting of simpler models for fluids with limited data.

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Pages : 2005-3

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Détails

  • Titre original : The thermodynamic properties of propane: from p-rho-T to the equation of state.
  • Identifiant de la fiche : 2006-0560
  • Langues : Anglais
  • Source : Commercial Refrigeration. Thermophysical Properties and Transfer Processes of Refrigerants. Proceedings of the IIR International Conferences.
  • Date d'édition : 02/08/2005

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