真空断熱材の熱伝導特性に関する数値シミュレーション

抄録

The thermal conductivity of the vacuum insulation material is about one tenth of that of conventional insulation materials. The thermal conductivity of some low thermal conductivity materials such as vacuum insulation material and so on is exceedingly lower in comparison with the measurement range of the conventional measuring device. In this study, heat transfer phenomena inside the vacuum insulation material are modeled and thermal conductivity is predicted by numerical analysis. It is assumed that the vacuum insulation material consists of glass fiber as the core material and aluminum film as the covering material. The solid thermal conduction inside the material and radiation transport by absorption / scattering are numerically modeling, and the effect of structural parameters such as the fiber diameter, fiber density and so on of the core material on the thermal conductivity characteristics of the heat insulating material is evaluated.