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Analysis of thermal-probe measurements using an iterative method to give sample conductivity and diffusivity data

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  • Goodhew, Steven
  • Griffiths, Richard

Abstract

The application of Microsoft Excel Solver routines to analyze data from a thermal-probe placed in a number of samples is described. The successful application of the Solver routine to the thermal-probe temperature time data requires the selection of an appropriate time-interval. The various critical times are discussed and a method proposed for selecting the appropriate Solver routine and the time-interval over which the experimental data must be analyzed. Values of the sample thermal conductivity, the thermal diffusivity and the probe to sample conductance are reported for a stainless-steel probe in unused mineral oil, and paraffin wax and for a copper probe in Magna904 and PTFE. The results for a commercial probe in agar agree with accepted data for water and the results for a clay-straw mixture demonstrates the method applied to a good insulator.

Suggested Citation

  • Goodhew, Steven & Griffiths, Richard, 2004. "Analysis of thermal-probe measurements using an iterative method to give sample conductivity and diffusivity data," Applied Energy, Elsevier, vol. 77(2), pages 205-223, February.
    • Handle: RePEc:eee:appene:v:77:y:2004:i:2:p:205-223
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    References listed on IDEAS

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    1. Batty, W.J. & Probert, S.D. & Ball, M. & O'Callaghan, P.W., 1984. "Use of the thermal-probe technique for the measurement of the apparent thermal conductivities of moist materials," Applied Energy, Elsevier, vol. 18(4), pages 301-317.
    2. Batty, W. J. & O'Callaghan, P. W. & Probert, S. D., 1984. "Assessment of the thermal-probe technique for rapid, accurate measurements of effective thermal conductivities," Applied Energy, Elsevier, vol. 16(2), pages 83-113.
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    Cited by:

    1. Cheng, Wenlong & Ma, Ran & Xie, Kun & Liu, Na & Huang, Yonghua, 2011. "Simultaneous measurement of thermal properties by thermal probe using stochastic approximation method," Applied Energy, Elsevier, vol. 88(5), pages 1834-1840, May.
    2. Christodoulides, Paul & Florides, Georgios & Pouloupatis, Panayiotis, 2016. "A practical method for computing the thermal properties of a Ground Heat Exchanger," Renewable Energy, Elsevier, vol. 94(C), pages 81-89.

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    1. Cheng, Wenlong & Ma, Ran & Xie, Kun & Liu, Na & Huang, Yonghua, 2011. "Simultaneous measurement of thermal properties by thermal probe using stochastic approximation method," Applied Energy, Elsevier, vol. 88(5), pages 1834-1840, May.

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