年間 4 号発行
ISSN 印刷: 2151-4798
ISSN オンライン: 2151-562X
Indexed in
THERMAL CONDUCTIVITY OF CERAMIC SPONGES AT TEMPERATURES UP TO 1000°C
要約
This publication reports about high-temperature heat transfer in ceramic sponges. Ceramic sponges are open-celled 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 so-called 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 twophase 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.
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