Measurements of the refractive index of alternative refrigerants

Journal Article · Mon Jan 01 04:00:00 EST 1996 · International Journal of Thermophysics

DOI:https://doi.org/10.1007/BF01448210· OSTI ID:376909

Yata, J; Hori, M; Kawakatsu, H ^[1]

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1. Kyoto Institute of Technology, Kyoto (Japan)

Measurements of coexistence curves of the refractive index of HCFC-22, HFC-23, HFC-32, HFC-125, and HFC-152a, have been carried out in the range from ambient to critical temperature. Near the critical temperature the refractive index has distribution in both the vapor and the liquid phases in the test cell. Thus the values at the boundary between vapor and liquid are selected at those of saturated vapor and liquid, respectively. The values of the critical temperature and critical refractive index for each substance are estimated. The refractive index is related to density by the Lorentz-Lorenz equation. In the case of HFC-32 the value of the LL function is assumed to be constant in the limited region near the critical point, and the values of density of saturated vapor and liquid are calculated and are compared with the experimental values of density obtained by PVT measurement.

• Sponsoring Organization: USDOE
• OSTI ID: 376909
• Report Number(s): CONF-940633--
• Journal Information: International Journal of Thermophysics, Journal Name: International Journal of Thermophysics Journal Issue: 1 Vol. 17; ISSN 0195-928X; ISSN IJTHDY
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRITICAL TEMPERATURE
ORGANIC FLUORINE COMPOUNDS
REFRACTIVE INDEX
REFRIGERANTS
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K