WEI Gaosheng, ZHANG Xinxin, YU Fan. Unit cell model for micro,nano-porous composite insulation material[J]. Chinese Journal of Engineering, 2008, 30(7): 781-785. DOI: 10.13374/j.issn1001-053x.2008.07.038
Citation:
WEI Gaosheng, ZHANG Xinxin, YU Fan. Unit cell model for micro,nano-porous composite insulation material[J]. Chinese Journal of Engineering, 2008, 30(7): 781-785. DOI: 10.13374/j.issn1001-053x.2008.07.038
WEI Gaosheng, ZHANG Xinxin, YU Fan. Unit cell model for micro,nano-porous composite insulation material[J]. Chinese Journal of Engineering, 2008, 30(7): 781-785. DOI: 10.13374/j.issn1001-053x.2008.07.038
Citation:
WEI Gaosheng, ZHANG Xinxin, YU Fan. Unit cell model for micro,nano-porous composite insulation material[J]. Chinese Journal of Engineering, 2008, 30(7): 781-785. DOI: 10.13374/j.issn1001-053x.2008.07.038
1. School of Energy and Power Engineering, Key Laboratory of the Ministry of Education of China for Condition Monitoring and Control of Power Plant Equipment, North China Electric Power University, Beijing 102206, China;
2. School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
Based on the microstructure features of xonotlite-aerogel composite insulation material, a three dimensional unit cell model was developed for the coupled heat transfer of gas and solid in the material. The effective thermal conductivities of xonotlite-type calcium silicate, aerogel and xonotlite-aerogel composite insulation material were compared by model calculation. The results show that the density of xonotlite-type calcium silicate has great influence on the effective thermal conductivity of xonotlite-aerogel composite insulation material, but the density of aerogel has little influence. The effective thermal conductivity of xonotlite-aerogel composite insulation material is apparently lower than those of xonotlite-type calcium silicate and aerogel at an elevated temperature.
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