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A full-scale experimental study concerning the moisture condensation on building glazing surface

机译：关于建筑玻璃表面水分凝结的全面实验研究

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摘要

Superficial condensation phenomena often occur on the glazed elements of buildings. As a result, the aim of this study is to put forward an experimental approach to assess the condensation rate on building glazing surface for full-scale room tests under realistic conditions. The proposed method for condensation quantification is applied in this work for surface condensation on a cold glazing (2.90 m x 2.30 m) within a ventilated test room (6.20 m x 3.10 m x 2.50 m). We first describe the full-scale test cell, focusing then on the experimental apparatus employed for the condensation study. This is followed by the description of the methodology for the condensation rate quantification. The approach is based on image processing techniques, using condensation pictures. This allows also to reveal the mechanisms behind the condensation appearance and growth. On the other hand, the experimental data achieved by this method are compared with theoretical results based on condensation rate and heat transfer coefficient correlations available in the literature. An overall difference of up to 18% between the measured results and the theoretical results was found for the condensation rate. Consequently, the method proposed in this work leads to promising results concerning the condensation rate quantification on cold glazing within full-scale enclosures.
机译：表面凝结现象经常发生在建筑物的玻璃元件上。因此，本研究的目的是提出一种实验方法，以评估在现实条件下进行全尺寸房间测试时，在建筑物玻璃表面上的凝结率。在这项工作中，所建议的凝结定量方法适用于在通风测试室（6.20 m x 3.10 m x 2.50 m）内的冷玻璃（2.90 m x 2.30 m）上进行表面凝结。我们首先描述了全尺寸测试单元，然后重点介绍了用于冷凝研究的实验设备。接下来是冷凝率定量方法的描述。该方法基于使用缩合图像的图像处理技术。这也可以揭示凝结现象和生长背后的机理。另一方面，将这种方法获得的实验数据与基于凝结率和传热系数相关性的理论结果进行比较，这些相关性可从文献中获得。对于冷凝速率，测量结果与理论结果之间的总差异高达18％。因此，这项工作中提出的方法导致了关于全尺寸围护结构中冷玻璃上凝结率定量的有希望的结果。

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