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Mesures des propriétés P?T, des pressions de vapeur, des masses volumiques saturées et des paramètres critiques pour R1234ze(Z) et R 245fa.

Measurements of P?T properties, vapor pressures, saturated densities, and critical parameters for R 1234ze(Z) and R 245fa.

Auteurs : HIGASHI Y., HAYASAKA S., SHIRAI C., et al.

Type d'article : Article, Article de la RIF

Résumé

Pressure-density-temperature (P?T) properties, vapor pressures, and saturated liquid and vapor densities for refrigerants R 1234ze(Z) (cis-1,3,3,3-tetrafluoroprop-1-ene; CF3CHdouble bond; length as m-dashCHF) and R 245fa (1,1,1,3,3-pentafluoropropane; C3H3F5) were measured with two types of isochoric methods. Pressure was measured with a digital quartz pressure transducer. Temperature was measured with 25 O standard platinum resistance thermometer on the ITS-90 temperature scale. Density was calculated from the mass of sample and the inner volume of pressure vessel. By using the present vapor pressure data, new vapor pressure correlations for R 1234ze(Z) and R 245fa have been formulated. In addition, the critical temperature Tc, critical density ?c, and critical pressure Pc were directly determined on the basis of direct observation of the meniscus disappearance.

Documents disponibles

Format PDF

Pages : 100-108

Disponible

  • Prix public

    20 €

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    Gratuit

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Détails

  • Titre original : Measurements of P?T properties, vapor pressures, saturated densities, and critical parameters for R 1234ze(Z) and R 245fa.
  • Identifiant de la fiche : 30014151
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 52
  • Date d'édition : 04/2015

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