Measurements of gaseous isobaric specific heat capacity of alternative refrigerants

Y. Ikeya, C. C. Piao, S. Yokota, H. Sato, K. Watanabe

研究成果: Article査読

4 被引用数 (Scopus)

抄録

A new apparatus applying gas-flow calorimetry has been developed which enables to measure the isobaric specific heat, Cp, of superheated gaseous fluids with high accuracy at temperatures up to 473 K and pressures up to 10 MPa. The experimental uncertainties in temperature, pressure, and Cp measurements are estimated being not greater than ± 5 mK, ± 4 kPa and ± 0.26 %, respectively. Four Cp values of gaseous HCFC-22 have been measured and compared with available data measured by Bier et al. (1974) and Ernst and Busser (1970) for examining the reliability of the apparatus, and four Cp values of the new refrigerant HFC-134a have also been measured and discussed concerning the ideal-gas specific heat by comparing with Cp values derivrd from sound velocity measurements, spectroscopic measurements or existing equation of state for HFC-134a.

本文言語English
ページ(範囲)119-129
ページ数11
ジャーナルFluid Phase Equilibria
80
C
DOI
出版ステータスPublished - 1992 11月 30
外部発表はい

ASJC Scopus subject areas

  • 化学工学(全般)
  • 物理学および天文学(全般)
  • 物理化学および理論化学

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