PRECISE MEASUREMENTS OF THE THERMAL CONDUCTIVITY OF TOLUENE AND n-HEPTANE BY THE ABSOLUTE TRANSIENT HOT-WIRE METHOD.

Yuji Nagasaka, Akira Nagashima

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

For the purpose of obtaining precise liquid thermal conductivity data as standard reference values, a new high-precision instrument, which is based upon the absolute transient hot-wire method, has been developed. A newly built digital system is used in this instrument for recording the transient temperature rise, which eliminates the conventional difficulty of this method. The thermal conductivities of toluene and n-heptene, reference substances suggested for the liquid thermal conductivity standard, have been measured in the temperature range 0-90 degree C at atmosphere pressure. The accuracy of the present measurements is estimated as plus or minus 0. 5%.

Original languageEnglish
Pages (from-to)216-220
Number of pages5
JournalIndustrial & Engineering Chemistry, Fundamentals
Volume20
Issue number3
Publication statusPublished - 1981 Aug

Fingerprint

Thermal conductivity of liquids
Toluene
Heptane
thermal conductivity
toluene
Thermal conductivity
Wire
liquid
Temperature
temperature
atmosphere
n-heptane
method

ASJC Scopus subject areas

  • Engineering(all)
  • Polymers and Plastics
  • Environmental Science(all)
  • Chemical Engineering (miscellaneous)

Cite this

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AB - For the purpose of obtaining precise liquid thermal conductivity data as standard reference values, a new high-precision instrument, which is based upon the absolute transient hot-wire method, has been developed. A newly built digital system is used in this instrument for recording the transient temperature rise, which eliminates the conventional difficulty of this method. The thermal conductivities of toluene and n-heptene, reference substances suggested for the liquid thermal conductivity standard, have been measured in the temperature range 0-90 degree C at atmosphere pressure. The accuracy of the present measurements is estimated as plus or minus 0. 5%.

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