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

Takahiro Sato; Haruki Sato; Koichi Watanabe

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

Takahiro Sato, Haruki Sato, Koichi Watanabe

Department of System Design Engineering

Research output: Contribution to journal › Conference article › peer-review

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 language	English
Pages (from-to)	1-12
Number of pages	12
Journal	American Society of Mechanical Engineers (Paper)
Publication status	Published - 1993 Dec 1
Event	Proceedings of the ASME Winter Conference - New Orleans, LA, USA Duration: 1993 Nov 28 → 1993 Dec 3

ASJC Scopus subject areas

Mechanical Engineering

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@article{3ba800619be748678542b1538dcc00f1,

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

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.",

author = "Takahiro Sato and Haruki Sato and Koichi Watanabe",

year = "1993",

month = dec,

day = "1",

language = "English",

pages = "1--12",

journal = "American Society of Mechanical Engineers (Paper)",

issn = "0402-1215",

note = "Proceedings of the ASME Winter Conference ; Conference date: 28-11-1993 Through 03-12-1993",

}

TY - JOUR

T1 - Thermodynamic property evaluation for a binary HFC-32+HFC-134a refrigerant based on experimental PVTx data

AU - Sato, Takahiro

AU - Sato, Haruki

AU - Watanabe, Koichi

PY - 1993/12/1

Y1 - 1993/12/1

N2 - 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.

AB - 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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JO - American Society of Mechanical Engineers (Paper)

JF - American Society of Mechanical Engineers (Paper)

SN - 0402-1215

T2 - Proceedings of the ASME Winter Conference

Y2 - 28 November 1993 through 3 December 1993

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