真空平板玻璃热传递理论计算及有限元分析

Theoretical Calculation and Finite Element Analysis of Heat Transfer in Vacuum Glazing

根据真空平板玻璃的结构特点和传热学原理,建立了真空平板玻璃热传递的理论计算模型,计算出真空平板玻璃从外部到内部的温度分布值。运用Abaqus有限元分析软件建立单元体模型和四分之一模型,求解出真空平板玻璃温度分布。分析结果表明,真空平板玻璃最大温降发生在间隙层;支撑体处温差主要发生在距离支撑体1 mm的平板玻璃中;封边对靠近边部的前两个支撑体处温度影响较大,从第3个支撑体开始对温度几乎无影响。

According to the structural characteristics of vacuum glazing and heat transfer theory, the heat transfer model of vacuum glazing was established. Temperature distribution from the outside surface to the inside of vacuum glazing was calculated. Due to the symmetry of the vacuum glazing, the unit cell and quarter finite element models were established to calculate the temperature distribution in vacuum glazing with the Abaqus software. It was found that, for the particular system studied, the largest temperature drop occurred in the vacuum gap. Temperature change near the pillar mainly took place in 1 mm of the glass away from the pillar. Edge seal has a greater inference on temperature at the location of the first two pillars close to the edge seal. From the third pillar on away from the edge seal, there is almost no effect on temperature.