Thermodynamic property evaluation for a binary HFC-32+HFC-134a refrigerant based on experimental PVTx data

Takahiro Sato, Haruki Sato, Koichi Watanabe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The experimental pressure-volume-temperature-composition (PVTx) properties of binary refrigerant, HFC-32 (difluoromethane)+HFC-134a (1,1,1,2-tetrafluoroethane) have been measured by means of a constant-mass method coupled with expansion procedure. A total of 178 pressure-volume-temperature-composition relationships were measured for the 20, 40, 60, and 80 wt% HFC-32 mixtures at 320-440 K, 1.5-6.2 MPa, and 61-183 kg/m3 by an apparatus of constant-mass-method with experimental errors of ±7 mK in temperature, ±2 kPa in pressure, ±0.1% in volume, and ±0.2% in composition, respectively. The sample purities are 99.998 wt% for HFC-32 and 99.99 wt% for HFC-134a. The second and third virial coefficients have been determined from the measurements. The enthalpy and entropy values in the gaseous phase are derived from the virial equations for each composition which can be used for the evaluation of the compressors for this binary refrigerant system in the refrigeration machine.

Original languageEnglish
Title of host publicationAmerican Society of Mechanical Engineers (Paper)
PublisherPubl by ASME
Pages1-12
Number of pages12
Publication statusPublished - 1993
EventProceedings of the ASME Winter Conference - New Orleans, LA, USA
Duration: 1993 Nov 281993 Dec 3

Other

OtherProceedings of the ASME Winter Conference
CityNew Orleans, LA, USA
Period93/11/2893/12/3

Fingerprint

Refrigerants
Thermodynamic properties
Chemical analysis
Refrigeration
Temperature
Compressors
Enthalpy
Entropy

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Sato, T., Sato, H., & Watanabe, K. (1993). Thermodynamic property evaluation for a binary HFC-32+HFC-134a refrigerant based on experimental PVTx data. In American Society of Mechanical Engineers (Paper) (pp. 1-12). Publ by ASME.

Thermodynamic property evaluation for a binary HFC-32+HFC-134a refrigerant based on experimental PVTx data. / Sato, Takahiro; Sato, Haruki; Watanabe, Koichi.

American Society of Mechanical Engineers (Paper). Publ by ASME, 1993. p. 1-12.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Sato, T, Sato, H & Watanabe, K 1993, Thermodynamic property evaluation for a binary HFC-32+HFC-134a refrigerant based on experimental PVTx data. in American Society of Mechanical Engineers (Paper). Publ by ASME, pp. 1-12, Proceedings of the ASME Winter Conference, New Orleans, LA, USA, 93/11/28.
Sato T, Sato H, Watanabe K. Thermodynamic property evaluation for a binary HFC-32+HFC-134a refrigerant based on experimental PVTx data. In American Society of Mechanical Engineers (Paper). Publ by ASME. 1993. p. 1-12
Sato, Takahiro ; Sato, Haruki ; Watanabe, Koichi. / Thermodynamic property evaluation for a binary HFC-32+HFC-134a refrigerant based on experimental PVTx data. American Society of Mechanical Engineers (Paper). Publ by ASME, 1993. pp. 1-12
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abstract = "The experimental pressure-volume-temperature-composition (PVTx) properties of binary refrigerant, HFC-32 (difluoromethane)+HFC-134a (1,1,1,2-tetrafluoroethane) have been measured by means of a constant-mass method coupled with expansion procedure. A total of 178 pressure-volume-temperature-composition relationships were measured for the 20, 40, 60, and 80 wt{\%} HFC-32 mixtures at 320-440 K, 1.5-6.2 MPa, and 61-183 kg/m3 by an apparatus of constant-mass-method with experimental errors of ±7 mK in temperature, ±2 kPa in pressure, ±0.1{\%} in volume, and ±0.2{\%} in composition, respectively. The sample purities are 99.998 wt{\%} for HFC-32 and 99.99 wt{\%} for HFC-134a. The second and third virial coefficients have been determined from the measurements. The enthalpy and entropy values in the gaseous phase are derived from the virial equations for each composition which can be used for the evaluation of the compressors for this binary refrigerant system in the refrigeration machine.",
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