Sound-velocity measurements for HFC-134a and HFC-152a with a spherical resonator

T. Hozumi, T. Koga, H. Sato, K. Watanabe

研究成果: Article査読

30 被引用数 (Scopus)

抄録

A spherical acoustic resonator was developed for measuring sound velocities in the gaseous phase and ideal-gas specific heats for new refrigerants. The radius of the spherical resonator, being about 5 cm, was determined by measuring sound velocities in gaseous argon at temperatures from 273 to 348 K and pressures up to 240 kPa. The measurements of 23 sound velocities in gaseous HFC-134a (1,1,1,2-tetrafluoroethane) at temperatures of 273 and 298 K and pressures from 10 to 250 kPa agree well with the measurements of Goodwin and Moldover. In addition, 92 sound velocities in gaseous HFC-152a (1,1-difluoroethane) with an accuracy of ±0.01% were measured at temperatures from 273 to 348 K and pressures up to 250 kPa. The ideal-gas specific heats as well as the second acoustic virial coefficients have been obtained for both these important alternative refrigerants. The second virial coefficients for HFC-152a derived from the present sound velocity measurements agree extremely well with the reported second virial coefficient values obtained with a Burnett apparatus.

本文言語English
ページ(範囲)739-762
ページ数24
ジャーナルInternational Journal of Thermophysics
14
4
DOI
出版ステータスPublished - 1993 7月 1

ASJC Scopus subject areas

  • 凝縮系物理学

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