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A proposal for thermal conductivity standards with special respect to convection and radiation effects

Ein Vorschlag für Wärmeleitfähigkeitsstandards unter besonderer Berücksichtigung der Konvektion und Strahlung

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Abstract

The influence of convection and especially radiation on measured liquid thermal conductivities is discussed for steady state methods and the transient hot wire method. New radiation and convection free thermal conductivity data are given for a mixture of 90% toluene and 10% ethanol, and for mono-, di-, and triethyleneglycol. The glycols are suitable as thermal conductivity standards for steady state methods and the transient hot wire method.

Zusammenfassung

Für stationäre Meßmethoden und für die instationäre Hitzdrahtmethode wird der Einfluß der Konvektion und der Strahlung auf die gemessene Wärmeleitfähigkeit von Flüssigkeiten diskutiert. Neue strahlungs- und konvektionsfreie Wärmeleitfähigkeitswerte werden für ein Gemisch aus 90% Toluol und 10% Ethanol und für Mono-, Diund Triethylenglycol angegeben. Die Glycole sind als Wärmeleitfähigkeitsstandard sowohl für stationäre Methoden als auch für die instationäre Hitzdrahtmethode geeignet.

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  1. Gartenstr. 17, D-6238, Hofheim/Ts.

    S. Fischer

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  1. S. Fischer
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Fischer, S. A proposal for thermal conductivity standards with special respect to convection and radiation effects. Wärme- und Stoffübertragung 20, 183–187 (1986). https://doi.org/10.1007/BF01303449

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  • DOI: https://doi.org/10.1007/BF01303449

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