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Solid Conductivity of Loaded Fibrous Insulations
Fricke, J
Physikalisches Institut der Universität Würzburg, Würzburg

Büttner, D

Caps, R

Gross, J

Nilsson, O

Pages: 13    Published: Jan 1990

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Source: STP1030-EB

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 P^ext = 1 bar the solid thermal conductivity λ^s 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 λ^s with P^ext is weak for the paper and pronounced for the fleece.

Three models were employed to study the correlation between λ^s 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

Paper ID: STP23299S
Committee/Subcommittee: C16.21
DOI: 10.1520/STP23299S
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