Fully automated apparatus to measure the thermal conductivity of liquids by the transient hot-wire method.

N. Kawaguchi, Yuji Nagasaka, A. Nagashima

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A new fully automated apparatus for measuring the thermal conductivity of liquids is described. This apparatus was developed to meet the needs of industrial applications. The principle of the measurement is based on the absolute transient hot wire method. All data acquisition and instrument control can be performed using a microcomputer. After filling with a sample liquid in a cell the apparatus can automatically measure the thermal conductivity at the desired temperature without any manual procedures. The automated procedures include an algorithm to determine onset time of natural convection. The applicability of the apparatus has been tested to measure the themal conductivity of toluene at room temperature and the results have an estimated accuracy of + OR - 1.0 + OR - 1.5% depending on a sample to be measured. (A)

Original languageEnglish
JournalREV. SCI. INSTRUM.
Volume56
Issue number9 , Sep. 1985, p.1788-1794.
Publication statusPublished - 1985
Externally publishedYes

Fingerprint

Thermal conductivity of liquids
thermal conductivity
wire
Wire
liquids
Natural convection
Microcomputers
Industrial applications
Toluene
Data acquisition
Thermal conductivity
Temperature
microcomputers
Liquids
free convection
data acquisition
toluene
conductivity
room temperature
cells

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Instrumentation

Cite this

Fully automated apparatus to measure the thermal conductivity of liquids by the transient hot-wire method. / Kawaguchi, N.; Nagasaka, Yuji; Nagashima, A.

In: REV. SCI. INSTRUM., Vol. 56, No. 9 , Sep. 1985, p.1788-1794., 1985.

Research output: Contribution to journalArticle

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AB - A new fully automated apparatus for measuring the thermal conductivity of liquids is described. This apparatus was developed to meet the needs of industrial applications. The principle of the measurement is based on the absolute transient hot wire method. All data acquisition and instrument control can be performed using a microcomputer. After filling with a sample liquid in a cell the apparatus can automatically measure the thermal conductivity at the desired temperature without any manual procedures. The automated procedures include an algorithm to determine onset time of natural convection. The applicability of the apparatus has been tested to measure the themal conductivity of toluene at room temperature and the results have an estimated accuracy of + OR - 1.0 + OR - 1.5% depending on a sample to be measured. (A)

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