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Sound velocity and ideal-gas specific heat of gaseous 1,1,1,2-tetrafluoroethane (R134a)

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Abstract

A cylindrical, variable-path acoustic interferometer operating at 156.252kHz is developed for determining ideal-gas specific heats. Results of validation measurements with argon are very satisfactory, with the maximum deviation of the speed of sound equal to 3×10−4. The sound velocity of gaseous R134a has been measured at low temperatures and low pressures. The specific heat was then calculated from the results. The experimental results corrected for various dispersions for the sound velocity of gaseous R134a match well with an earlier publication, with a room mean square deviation of 2.56×10−4. A new relation for the ideal-gas specific heat as a function of temperature for R134a is obtained.

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Authors and Affiliations

  1. Department of Thermal Engineering, Tsinghua University, 100084, Beijing, P.R. China

    M. S. Zhu, L. Z. Han & K. Z. Zhang

  2. Department of Physics, Tsinghua University, 100084, Beijing, P.R. China

    T. Y. Zhou

Authors
  1. M. S. Zhu
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  2. L. Z. Han
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  3. K. Z. Zhang
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  4. T. Y. Zhou
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Zhu, M.S., Han, L.Z., Zhang, K.Z. et al. Sound velocity and ideal-gas specific heat of gaseous 1,1,1,2-tetrafluoroethane (R134a). Int J Thermophys 14, 1039–1050 (1993). https://doi.org/10.1007/BF00505674

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  • DOI: https://doi.org/10.1007/BF00505674

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