Experimental vapor pressures andP-ρ-T data of an important alternative refrigerant, 1, 1-difluoroethane (HFC-152a), have been measured by means of a constant-volume method coupled with expansion procedures. SixtyP-ρ-T data were measured along eight isochores in a range of temperaturesT from 330 to 440 K, at pressuresP from 1.6 to 9.3 MPa, and at densitiesρ from 51 to 811 kg·m−3. Forty-six vapor pressures were also measured at temperatures from 320 K to the critical temperature. The uncertainties of the temperature and pressure measurements are within ±7mK and ±2kPa, respectively, while the uncertainty of the density values is within ±0.1%. The purity of the sample used is 99.9 wt%. On the basis of the measurements along each isochore, five saturation points were determined and the critical pressure was determined by correlating the vapor-pressure measurements. The second and third virial coefficients for temperatures from 360 to 440 K have also been determined.
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Y. Takaishi, M. Uematsu, and K. Watanabe,Proc. 15th Int. Congr. Refrig., Vol. 2 (International Institute of Refrigeration, Paris, 1980), p. 117–122.
Y. Takaishi, M. Uematsu, and K. Watanabe,Bull. JSME 25:944 (1982).
J. Soll,U.S. Patent 2(118):901 (1938).
W. H. Mears, R. F. Stahl, S. R. Orfeo, R. C. Shair, L. F. Keils, W. Thomson, and H. McGann,Ind. Eng. Chem. 47:1449 (1955).
Y. Higashi, M. Ashizawa, Y. Kabata, T. Majima, M. Uematsu, and K. Watanabe,JSME Int. J. 30:1106 (1987).
W. Wagner,Fortschr.-Ber. VDI-Z 3:181 (1974).
H. D. Baehr and R. Tillner-Both,J. Chem. Thermodyn. 23:1063 (1991).
N. Yada, M. Uematsu, and K. Watanabe,Trans. JAR 5:107 (1988).
A. Iso and M. Uematsu,Physica A 156:454 (1989).
M. Takahashi, Y. Yokoyama, and S. Takahashi,Proc. 7th Jpn. Symp. Thermophys. Prop. (Jap. Soc. Thermophys. Prop., Tokyo, 1986), pp. 179–182.
Z. Zhao, J. Yin, and L. Tan,Fluid Phase Equil. (in press).
M. O. McLinden,Int. J. Refrig. 13:149 (1990).
H. Sato, M. Uematsu, K. Watanabe, and M. Okada,Fluid Phase Equil. 36:167 (1987).
R. Tillner-Roth, H. D. Baehr, and F. Klobasa,DKV-Tagung 17 Jahrg, Heidelberg 2:193 (1990).
R. Tillner-Roth and H. D. Baehr,J. Chem. Thermodyn. 24:413 (1992).
Y. Kabata, M.S. thesis (Dept. Mech. Eng., Keio University, Yokohama, 1987).
T. Majima, M. Uematsu, and K. Watanabe,Proc. 8th. Jpn. Symp. Thermophys. Prop. (Jap. Soc. Thermophys. Prop., Tokyo, 1987), pp. 77–80.
T. Majima, M.S. thesis (Dept. Mech. Eng., Keio University, Yokohama, 1987).
M. Takahashi, C. Yokoyama, and S. Takahashi,J. Chem. Eng. Data 32:98 (1987).
T. Tamatsu, H. Sato, and K. Watanabe,Int. J. Refrig. (in press).
K. Fujiwara, H. Kubota, Y. Tanaka, and T. Makita,Proc. 27th High Press. Conf. Jap. (Japan Society of High Pressure Science and Technology, Kyoto, 1986), pp. 230–231.
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Tamatsu, T., Sato, T., Sato, H. et al. An experimental study of the thermodynamic properties of 1,1-difluoroethane. Int J Thermophys 13, 985–997 (1992). https://doi.org/10.1007/BF01141210
- critical parameters
- equation-of-state data
- vaporliquid equilibrium
- vapor pressure
- virial coefficient