Thermal conductivity of HFC-32, HFC-125, and HFC-134a in the solid phase

X. Gao, Yuji Nagasaka, A. Nagashima

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Measurements of the thermal conductivity of HFC-32, HFC-125, and HFC-134a were carried out for the first time in both solid and liquid phases at the saturation pressure at room temperature and in the temperature ranges from 120 to 263, from 140 to 213, and from 130 to 295 K, respectively. A transient hot-wire instrument using one bare platinum wire was employed for measurements, with an uncertainty of less than ±2%. The experimental results demonstrated that the thermal conductivity of HFC-32, HFC-125, and HFC-134a in the solid phase showed a positive temperature dependence. For HFC-32 and HFC-125, there were big jumps between the solid and the liquid thermal conductivity at the melting point. But for HFC-134a, the solid and liquid thermal conductivity at the melting point is almost-continuous.

Original languageEnglish
Pages (from-to)415-425
Number of pages11
JournalInternational Journal of Thermophysics
Volume19
Issue number2 SPEC.ISS.
DOIs
Publication statusPublished - 1998 Mar

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norflurane
Thermal conductivity of liquids
solid phases
Thermal conductivity
thermal conductivity
Melting point
Thermal conductivity of solids
Wire
melting points
wire
Platinum
Temperature
liquids
liquid phases
platinum
Liquids
saturation
temperature dependence
pentafluoroethane
room temperature

Keywords

  • HFC-125
  • HfC-134a
  • HFC-32
  • Melting point
  • Refrigerant
  • Thermal conductivity
  • Transient hot-wire method

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Mechanics of Materials
  • Computational Mechanics
  • Fluid Flow and Transfer Processes
  • Physics and Astronomy (miscellaneous)

Cite this

Thermal conductivity of HFC-32, HFC-125, and HFC-134a in the solid phase. / Gao, X.; Nagasaka, Yuji; Nagashima, A.

In: International Journal of Thermophysics, Vol. 19, No. 2 SPEC.ISS., 03.1998, p. 415-425.

Research output: Contribution to journalArticle

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