Partager

Document IIF

Étude sur la capacité thermique massique isochore d'un mélange de R32 + R1234ze (E) en phase liquide.

Study on the isochoric specific heat capacity of a R32 + R1234ze(E) mixture in the liquid phase.

Numéro : pap. ID: 303

Auteurs : YAMAYA K., MATSUGUCHI A., KAGAWA N.

Résumé

Isochoric specific heat capacity (cv) of mass fraction w= 0.51 R32+(1-w)trans-1,3,3,3-tetrafluoropropene [R1234ze(E)] mixture in the liquid phase were measured with a twin-cell type adiabatic calorimeter. The sample purity of R32 and R1234ze(E) was certified to have a minimum purity of 0.9997 mole fraction and 0.9996 mole fraction respectively by gas chromatographic analysis. The measurements were obtained for temperatures ranging from 274 to 464 K and at pressures up to 30 MPa. Temperatures were measured with a platinum resistance thermometer on the bottom of each cell and were reported based on the ITS-90. Sample pressures were measured with a quartz crystal transducer. Densities were calculated from the volume of the calorimeter cell and the sample mass. The expanded uncertainty (with a coverage factor k=2) of temperature measurements is 13 mK, and 8 kPa for pressure measurements. The expanded relative uncertainty of density is 0.16%. As a result, the experimental expanded relative uncertainty of isochoric specific heat capacity (cv) is estimated to be from 2.02 to 2.75% in the liquid phase. The results of cv measurements were compared with cv measurements of the component substances of the mixture which were measured with same calorimeter previously.

Documents disponibles

Format PDF

Pages : 7 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

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

Détails

  • Titre original : Study on the isochoric specific heat capacity of a R32 + R1234ze(E) mixture in the liquid phase.
  • Identifiant de la fiche : 30002441
  • Langues : Anglais
  • Source : Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Date d'édition : 21/08/2011

Liens


Voir d'autres communications du même compte rendu (569)
Voir le compte rendu de la conférence

Indexation