纳米孔隔热材料等效热导率的计算

Calculation Method of Effective Thermal Conductivity for Nanoporous Insulation Material

通过文献调研,分别讨论了纳米孔高效隔热材料在微米尺度和纳米尺度下气体导热,纳米尺度孔结构气固耦合等效热导率,添加遮光剂颗粒的气凝胶复合等效热导率和高温辐射等效热导率的计算方法。在此基础上,调研了用于计算流固耦合等效热导率计算的几种典型理想结构,结合对纳米孔高效隔热材料等效热导率有影响的各种因素及微米理想结构,采用热阻串并联的分析方法,可以计算纳米孔高效隔热材料的等效热导率。

Through the literature research,the calculation methods of effective thermal conductivity of gas in nano or micro scale,the gas-solid conjugate thermal conductivity in nanoporous structure,the coupled thermal conductivity of opacifier-aerogel and the effective radiation conductivity were summarized in this paper.The method of equivalent circuit analysis was conducted for calculation of the total effective thermal conductivity of nanoporous insulation material.