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A Quasi-Steady State Technique to Measure the Thermal Conductivity

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Abstract

A new method is developed for the measurement of thermal conductivity. It combines characteristic advantages of steady-state and transient techniques but avoids major drawbacks of both these classes of methods. On the basis of a simple transient hot wire (THW) or transient hot-strip (THS) arrangement, a direct indicating thermal-conductivity meter is realized by adding only one temperature sensor. After a short settling time during which all transients die out, the instrument operates under quasi-steady state conditions. No guard heaters are required because outer boundaries are free to change with time. The instrument's uncertainty is provisionally estimated to be 3%.

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Authors and Affiliations

  1. Physikalisch-Technische Bundesanstalt, Bundesallee 100, D-38116, Braunschweig, Germany

    U. Hammerschmidt

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  1. U. Hammerschmidt
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Correspondence to U. Hammerschmidt.

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Hammerschmidt, U. A Quasi-Steady State Technique to Measure the Thermal Conductivity. International Journal of Thermophysics 24, 1291–1312 (2003). https://doi.org/10.1023/A:1026151101668

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  • DOI: https://doi.org/10.1023/A:1026151101668

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