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 |
|---|---|
| Title of host publication | American Society of Mechanical Engineers (Paper) |
| Publisher | Publ by ASME |
| Pages | 1-12 |
| Number of pages | 12 |
| Publication status | Published - 1993 |
| Event | Proceedings of the ASME Winter Conference - New Orleans, LA, USA Duration: 1993 Nov 28 → 1993 Dec 3 |
Other
| Other | Proceedings of the ASME Winter Conference |
|---|---|
| City | New Orleans, LA, USA |
| Period | 93/11/28 → 93/12/3 |
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ASJC Scopus subject areas
- Mechanical Engineering
Cite this
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 proceeding › Conference contribution
}
TY - GEN
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
Y1 - 1993
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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M3 - Conference contribution
AN - SCOPUS:0027836631
SP - 1
EP - 12
BT - American Society of Mechanical Engineers (Paper)
PB - Publ by ASME
ER -