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

Takahiro Sato, Haruki Sato, Koichi Watanabe

研究成果: Conference article査読

抄録

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.

本文言語English
ページ(範囲)1-12
ページ数12
ジャーナルAmerican Society of Mechanical Engineers (Paper)
出版ステータスPublished - 1993 12月 1
イベントProceedings of the ASME Winter Conference - New Orleans, LA, USA
継続期間: 1993 11月 281993 12月 3

ASJC Scopus subject areas

  • 機械工学

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