STP1030

    Solid Conductivity of Loaded Fibrous Insulations

    Published: Jan 1990


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    Abstract

    The thermal conductivity and the elasto-mechanical behavior of a fibrous glass paper insulation and of a fibrous alumina fleece were investigated as a function of external pressure load. The main findings are: (1) at an external load Pext = 1 bar the solid thermal conductivity λs of the glass fiber paper is about 1.5 ∙ 10-3 W/(m ∙ K) and for the fleece is 3 ∙ 10-3 W/(m ∙ K); and (2) the variation of λs with Pext is weak for the paper and pronounced for the fleece.

    Three models were employed to study the correlation between λs and the elasto-mechanical behavior: Kaganer's model, percolation theory, and the phonon diffusion model.

    Keywords:

    fiber insulation, thermal conductivity, solid conduction, radiative heat transfer, elasto-mechanical behavior, disperse systems


    Author Information:

    Fricke, J
    Physikalisches Institut der Universität Würzburg, Am Hubland, Würzburg

    Büttner, D
    Physikalisches Institut der Universität Würzburg, Am Hubland, Würzburg

    Caps, R
    Physikalisches Institut der Universität Würzburg, Am Hubland, Würzburg

    Gross, J
    Physikalisches Institut der Universität Würzburg, Am Hubland, Würzburg

    Nilsson, O
    Physikalisches Institut der Universität Würzburg, Am Hubland, Würzburg


    Paper ID: STP23299S

    Committee/Subcommittee: C16.21

    DOI: 10.1520/STP23299S


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