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首页> 外文会议>HT2008;ASME summer heat transfer conference >COMPARISON OF VACUUM GLAZING THERMAL PERFORMANCE PREDICTED USING TWO AND THREE DIMENSIONAL MODELS AND THEIR EXPERIMENTAL VALIDATION
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COMPARISON OF VACUUM GLAZING THERMAL PERFORMANCE PREDICTED USING TWO AND THREE DIMENSIONAL MODELS AND THEIR EXPERIMENTAL VALIDATION

机译：两种三维模型预测的真空玻璃热性能的比较及其实验验证

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摘要

The thermal performance of vacuum glazing was predicted using two dimensional (2-D) finite element and three dimensional (3-D) finite volume models. In the 2-D model, the vacuum space, including the pillar arrays, was represented by a material whose effective thermal conductivity was determined from the specified vacuum space width, the heat conduction through the pillar array and the calculated radiation heat transfer between the two interior glass surfaces within the vacuum gap. In the 3-D model, the support pillar array was incorporated and modeled within the glazing unit directly. The difference in predicted overall heat transfer coefficients between the two models for the vacuum window simulated was less than 3%. A guarded hot box calorimeter was used to determine the experimental thermal performance of vacuum glazing. The experimentally determined overall heat transfer coefficient and temperature profiles along the central line of the vacuum glazing are in very good agreement with the predictions made using the 2-D and 3-D models.
机译：使用二维（2-D）有限元和三维（3-D）有限体积模型来预测真空玻璃的热性能。在二进制模型中，包括柱阵列的真空空间由具有从规定的真空空间宽度确定有效导热率的材料，通过柱阵列的热传导和两者之间的计算辐射热传递的材料表示真空间隙内的内部玻璃表面。在3-D型号中，将支撑柱阵列纳入并直接在玻璃窗中进行建模。模拟真空窗口两种模型之间的预测总传热系数之间的差异小于3％。守卫的热箱热计用于确定真空玻璃的实验热性能。通过使用2-D和3-D模型进行的预测，实验确定沿着真空玻璃的中央线的总传热系数和温度曲线非常好。

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