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Effective thermal conductivity analysis of xonotlite-aerogel composite insulation material

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Abstract

A 3-dimensional unit cell model is developed for analyzing effective thermal conductivity of xonotlite-aerogel composite insulation material based on its microstructure features. Effective thermal conductivity comparisons between xonotlite-type calcium silicate and aerogel as well as xonotlite-aerogel composite insulation material are presented. It is shown that the density of xonotlite-type calcium silicate is the key factor affecting the effective thermal conductivity of xonotlite-aerogel composite insulation material, and the density of aerogel has little influence. The effective thermal conductivity can be lowered greatly by composite of the two materials at an elevated temperature.

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Authors and Affiliations

  1. School of Energy and Power Engineering, Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education, North China Electric Power University, Beijing, 102206, China

    Gaosheng Wei

  2. School of Mechanical Engineering, University of Science & Technology Beijing, Beijing, 100083, China

    Xinxin Zhang & Fan Yu

Authors
  1. Gaosheng Wei
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  2. Xinxin Zhang
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  3. Fan Yu
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Wei, G., Zhang, X. & Yu, F. Effective thermal conductivity analysis of xonotlite-aerogel composite insulation material. J. Therm. Sci. 18, 142–149 (2009). https://doi.org/10.1007/s11630-009-0142-1

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  • DOI: https://doi.org/10.1007/s11630-009-0142-1

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