Measurements of gaseous isobaric specific heat capacity of alternative refrigerants

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

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)119-129
Number of pages11
JournalFluid Phase Equilibria
Issue numberC
Publication statusPublished - 1992 Nov 30
Externally publishedYes


  • HCFC-22
  • HFC-134a
  • alternative refrigerants
  • flow calorimetry
  • isobaric specific heat at ideal gas condition.
  • isobaric specific heat capacity

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


Dive into the research topics of 'Measurements of gaseous isobaric specific heat capacity of alternative refrigerants'. Together they form a unique fingerprint.

Cite this