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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-421-2

International Heat Transfer Conference 15
August, 10-15, 2014, Kyoto, Japan

Thermal Conductivity of Ceramic Sponges at Temperatures up to 1000°C

Get access (open in a dialog) DOI: 10.1615/IHTC15.pmd.008405
pages 6505-6517

Résumé

This publication reports about high temperature heat transfer in ceramic sponges. Ceramic sponges are opencelled solid network structures with advantageous properties: low pressure drop, high specific surface area, comparatively high heat transfer and good cross mixing in the fluid. For designing technical equipment a socalled homogeneous model for calculating the heat transport inside the sponges can be used. The key parameter for this model is the two-phase thermal conductivity (also often called effective thermal conductivity). In this contribution experimental results for the two-phase thermal conductivity with and without flow for different Al2O3 sponge types are presented. The temperature was varied up to 1000°C, where thermal radiation has to be considered as one important heat transfer mechanism. The results were correlated enabling the estimation of heat transfer in any sponges.