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Numerical study of slim curtain wall spandrel with integrated vacuum insulation panel: Concept, performance evaluation and challenges

机译：集成真空隔热板的薄型幕墙墙托的数值研究：概念，性能评估和挑战

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The thermal and energy performance of curtain wall facades can be improved by incorporating spandrel units in areas such as slabs/plenums to hide existing building services or areas where concealment of indoor space is required. The main objective of this study was to numerically investigate the performance of curtain wall facade with integrated vacuum insulation panel (VIP) as spandrel insulation. The main study constitutes six parts: (1) concept and derivation of governing equations, (2) model and its validation, (3) VIP integration alternatives, (4) overall thermal performance considering 2D/3D thermal bridges and internal surface temperatures, (5) building energy and vision-spandrel ratio effect, and (6) limitations and challenges. Thermal behavior of the system was characterized via 3D heat transfer simulations using Physibel TRISCO according to EN ISO 10211, while dynamic building energy analysis was carried out using EnergyPlus based on a stereotypical office building unit, in relation to the humid continental climate of Incheon, Republic of Korea, The baseline model was validated with experimental data from previous study, and a marginal discrepancy less than 4% was found between them. Further, the validated model was developed into different spandrel configurations, seeking to mitigate thermal bridges while improving insulation performance, by varying VIP integration design. Results indicated that the best VIP spandrel alternative improved thermal performance of the system by about 30%. Moreover, year-round space heating and cooling energy reductions were realized by gradually increasing the spandrel area by ratio from 0% to 80%, howbeit at the expense of electrical lighting energy. Finally, some noteworthy limitations of the study and challenges related to VIP integration into curtain wall spandrel have been duly discussed. (C) 2018 Elsevier B.V. All rights reserved.
机译：幕墙外墙的热和能源性能可以通过在板/气室等区域并入隔板以隐藏现有建筑服务或需要隐藏室内空间的区域来改善。这项研究的主要目的是从数值上研究集成真空绝热板（VIP）作为幕墙绝热的幕墙外墙的性能。主要研究包括六个部分：（1）控制方程的概念和推导，（2）模型及其验证，（3）VIP集成替代方案，（4）考虑2D / 3D热桥和内部表面温度的整体热性能，（ 5）建筑能耗和视觉-灰比比率影响，以及（6）局限性和挑战。根据EN ISO 10211，使用Physibel TRISCO通过3D传热模拟对系统的热行为进行了表征，同时使用EnergyPlus基于定型办公楼单元对建筑的动态行为进行了分析，并与共和国仁川的潮湿大陆性气候相关韩国的基线模型已通过先前研究的实验数据进行了验证，并且两者之间的边际差异小于4％。此外，通过更改VIP集成设计，将经过验证的模型开发为不同的跨距配置，以减轻热桥的同时提高绝缘性能。结果表明，最好的VIP跨距替代方案将系统的热性能提高了约30％。此外，通过将翼d面积按比例从0％逐渐增加到80％来实现全年空间供暖和制冷能量的减少，但这是以牺牲电子照明能源为代价的。最后，已经适当讨论了该研究的一些值得注意的局限性以及与VIP集成到幕墙式墙d相关的挑战。 （C）2018 Elsevier B.V.保留所有权利。

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