Share

IIR document

Propriétés PVTx du mélange ternaire dioxyde de carbone (CO2)/difluorométhane(R-32)/1,1,1,2-tétrafluoroéthane (R-134a) mesuré à l'état de liquide comprimé, de vapeur surchauffée et diphasique

PVTx properties for carbon dioxide (CO2)/difluoromethane (R32)/1,1,1,2-tetrafluoroethane (R134a) ternary mixture measured in the compressed liquid, superheated vapour, and two-phase regions.

Author(s) : FEDELE L., DI NICOLA G., MENEGAZZO D., TOMASSETTI S., BOBBO S., QUATTROCCHI P., ALEMANNO L., CATANZANI L., AMATO S.

Type of article: IJR article

Summary

In low-temperature refrigeration applications, mixtures containing carbon dioxide and refrigerants with low triple points are considered potential substitutes for the refrigerant R23, characterised by a very high global warming potential. This study provides pvTx measurements for the ternary mixture of carbon dioxide (CO2), difluoromethane (R32), and 1,1,1,2-tetrafluoroethane (R134a) carried out in the compressed liquid, superheated vapour, and two-phase regions. A vibrating tube densimeter was used to measure the compressed liquid density along eight isotherms evenly spaced from (283.15 to 353.15) K and for pressures from near saturation up to 35 MPa. An isochoric apparatus was used to measure the two-phase and superheated vapour pvTx properties along three isochores from (223.15 to 303.15) K. The measurement uncertainties were estimated to be lower than 1 kg∙m−3 for the liquid density and 0.02 m3∙kg−1 for the vapour specific volume. All the presented properties were compared with the calculations of the multi-fluid Helmholtz-energy explicit model. Both the default binary interaction parameters available in REFPROP 10.0 and new binary interaction parameters tuned on the presented data and the experimentally-determined thermodynamic properties collected from the literature have been used in the model. The tuned parameters provided lower deviations than the default parameters used in REFPROP 10.0

Available documents

Format PDF

Pages: 136-145

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: PVTx properties for carbon dioxide (CO2)/difluoromethane (R32)/1,1,1,2-tetrafluoroethane (R134a) ternary mixture measured in the compressed liquid, superheated vapour, and two-phase regions.
  • Record ID : 30031892
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 151
  • Publication date: 2023/07
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2023.04.001

Links


See other articles in this issue (34)
See the source

Indexing