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

机译：建筑玻璃表面水分凝结的全规模实验研究

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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：浅表凝结现象通常发生在建筑物的釉料元素上。因此，本研究的目的是提出了一种实验方法来评估建筑玻璃表面的冷凝率，以便在现实条件下进行全尺度室测试。该工作中所提出的冷凝量化方法适用于通风测试室内冷藏（2.90m×2.30米）的表面凝结（6.20m x 3.10m x 2.50 m）。我们首先描述全尺寸的测试单元，对焦于用于冷凝研究的实验装置。这是对冷凝率定量的方法的描述之后。该方法基于图像处理技术，使用冷凝图像。这也允许揭示凝结外观和生长背后的机制。另一方面，通过该方法实现的实验数据与基于文献中可用的冷凝率和传热系数相关性的理论结果进行比较。测量结果与理论结果之间的总体差异高达18％的凝结率。因此，本作作品中提出的方法导致有关在全尺寸外壳内对冷玻璃的冷凝速率定量的有希望的结果。

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