SYMPOSIA PAPER Published: 01 January 1990
STP23299S

Solid Conductivity of Loaded Fibrous Insulations

Source

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.

Author Information

Fricke, J
Physikalisches Institut der Universität Würzburg, Am Hubland, Würzburg, West Germany
Büttner, D
Physikalisches Institut der Universität Würzburg, Am Hubland, Würzburg, West Germany
Caps, R
Physikalisches Institut der Universität Würzburg, Am Hubland, Würzburg, West Germany
Gross, J
Physikalisches Institut der Universität Würzburg, Am Hubland, Würzburg, West Germany
Nilsson, O
Physikalisches Institut der Universität Würzburg, Am Hubland, Würzburg, West Germany
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Details
Developed by Committee: C16
Pages: 66–78
DOI: 10.1520/STP23299S
ISBN-EB: 978-0-8031-5109-3
ISBN-13: 978-0-8031-1278-0