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Finite element analysis of heat transfer performance of vacuum glazing with low-emittance coatings by using ANSYS

机译：利用ANSYS对低辐射涂层真空玻璃的传热性能进行有限元分析

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摘要

As a new transparent insulation material, vacuum glazing with Low-E (low emittance) coating has drawn more and more attentions thanks to its excellent performances: outstanding thermal and sound insulations, anti-frosting, resisting wind press capacity, and good durability. However, a comprehensive analysis and evaluation on the heat transfer performance of Low-E vacuum glazing are still missing in the current literatures. In this work, the influences of various aspects on the heat transfer performance of Low-E vacuum glazing were analyzed based on the Finite Element Analysis (FEA) method, including thickness of substrate glass, width of the sealing edge, materials and spacing of support pillar array, and insulation frame structure. The simulated results show the following, 1) with the increase of the thickness of the substrate glass, the heat transfer coefficient of the Low-E vacuum glazing rises slowly in a linear trend. The larger the size of the whole piece of the glazing, the more slowly it rises; 2) the Low-E vacuum glazing heat transfer coefficient declines linearly with the decrease of the width of the sealing edge; 3) as the support pillar array spacing increases and the thermal conductivity of the support pillar array decreases, the Low-E vacuum glazing heat transfer coefficient decreases; 4) the use of thermal insulation frame structure can improve the insulation efficiency of the vacuum glazing. Experiments were carried out on a Low-E vacuum glazing, and the heat transfer coefficient of this vacuum glazing was determined by the Building Heat Resistance-Ill (BHR-III), an equipment for insulation performance testing. The simulated result matches well with the experimental result, with a relative deviation of 2.8%, which confirms the reliability of the simulation result. This work is expected to provide guidance for optimization design of Low-E vacuum glazing and its insulation performance evaluation. (C) 2019 Elsevier B.V. All rights reserved.
机译：作为一种新型的透明绝缘材料，具有Low-E（低发射率）涂层的真空玻璃由于其出色的性能而受到越来越多的关注：出色的隔热和隔音性能，防霜，抗风压能力以及良好的耐久性。然而，在当前文献中仍缺少对Low-E真空玻璃的传热性能的综合分析和评估。在这项工作中，基于有限元分析（FEA）方法分析了各个方面对Low-E真空玻璃的传热性能的影响，包括基板玻璃的厚度，密封边缘的宽度，材料和支撑间距支柱阵列和绝缘框架结构。仿真结果表明：1）随着基底玻璃厚度的增加，Low-E真空玻璃的传热系数呈线性趋势缓慢上升。整块玻璃的尺寸越大，上升的速度就越慢。 2）Low-E真空玻璃的传热系数随着密封边缘宽度的减小而线性下降； 3）随着支柱阵列间距的增加和支柱阵列的热导率的降低，Low-E真空玻璃的传热系数降低； 4）采用隔热框架结构可以提高真空玻璃的隔热效率。在Low-E真空玻璃窗上进行了实验，该真空玻璃窗的传热系数由建筑隔热性能测试设备BIR-III确定。仿真结果与实验结果吻合较好，相对偏差为2.8％，证实了仿真结果的可靠性。这项工作有望为Low-E真空玻璃的优化设计及其绝缘性能评估提供指导。 （C）2019 Elsevier B.V.保留所有权利。

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