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International Journal of Thermophysics

, Volume 26, Issue 1, pp 63–81 | Cite as

Rapid Measurements of Thermodynamic Properties for Alternative Refrigerants with Vibrating-Tube Densimeter

  • Y. KanoEmail author
  • M. Hasumoto
  • Y. Kayukawa
  • K. Watanabe
Article

Abstract

More than 2000 PVT data in the liquid phase, vapor phase, and at saturation boundaries have been obtained for pure compounds of several alternative refrigerants. In addition, more than 1000 liquid-density data have been obtained for several binary and ternary mixtures. The alternative refrigerants measured in the present study include CF3OCH3 (trifluoromethyl methyl ether) and CF3CF2OCH3 (pentafluoroethyl methyl ether), which are hydrofluoroethers developed by RITE (the Research Institute of Innovative Technology for the Earth, Japan), and typical hydrocarbons, such as propane, n-butane, isobutene, and their binary and ternary mixtures. The measurement uncertainties are estimated to be 3 to 7mK for temperature, 0.26kPa or 0.022% whichever is greater for pressure, and 0.07 kg ·m3 or 0.024% whichever is greater for density. The present measurement system took only a few minutes to get one PVT datum, and one or two days to complete all the measurements for a single fluid at temperatures from 240 to 380\,K and at pressures up to 7\,MPa. In addition, an empirical equation of state (EoS) for the liquid phase was developed on the basis of the present data, and the EoS nicely reproduces not only the present data but also existing data reported by other researchers.

Keywords

isobutane (R-600a) mixtures n-butane (R-600) pentafluoroethyl methyl ether (CF3CF2OCH3 propane (R-290) PVT properties trifluoromethyl methylether (CF3OCH3 vibrating-tube densimeter 

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Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • Y. Kano
    • 1
    Email author
  • M. Hasumoto
    • 2
  • Y. Kayukawa
    • 3
  • K. Watanabe
    • 1
  1. 1.School of Science for Open and Environmental SystemsKeio UniversityYokohamaJapan
  2. 2.Matsushita Electric Works, Ltd.Kadoma-shiJapan
  3. 3.5Fluid Properties Section, Material Properties and Metrological Statistics Division, National Metrology Institute of JapanNational Institute of Advanced Industrial Science and TechnologyTsukubaJapan

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