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Wind tunnel analysis of artificial substrates used in active living walls for indoor environment conditioning in Mediterranean buildings

机译:地中海建筑室内环境中用于活动居住墙的人造基材的风洞分析

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In this paper, a low-speed wind tunnel was used for experimental analysis of water volume retained, pressure drop, saturation efficiency and water consumption for three types of synthetic substrates used in active living walls: polyester (PR), polyurethane (PU) and polyamide-polypropylene (PA-PP) The substrates were of a similar thickness and were tested for different water and air flows. The water retained increases with higher water flow. The pressure drop increases with the presence of vegetation and when air speed and water flow is higher. Cooling efficiency is enhanced with vegetation and low air speed. Specific consumption of water is greater with vegetation at higher air speeds. Therefore, low air (between 0.25 and 0.5 m s~(-1)) and water flows are recommended to ensure a homogeneous wetting of the substrate surface. PA-PP has the greatest pressure drop of the three, but also presents the best saturation efficiency, with an average water retention capacity and less specific consumption. PU offers the least resistance to air flow, with an intermediate efficiency level and high water consumption and water retention capacity. PR presents the worst saturation efficiency, a medium level of pressure drop and high water consumption.
机译:本文使用低速风洞对活性活墙中使用的三种类型的合成基材的水保留量,压降,饱和效率和耗水量进行了实验分析:聚酯(PR),聚氨酯(PU)和聚氨酯聚酰胺-聚丙烯(PA-PP)基材的厚度相似,并测试了不同的水和空气流量。随着较高的水流量,保留的水增加。压降随着植被的存在以及空气速度和水流量的增加而增加。植被和低风速可提高制冷效率。在较高的风速下,植被的水比消耗更大。因此,建议使用低空气(介于0.25和0.5 m s〜(-1)之间)和水流,以确保基材表面均匀润湿。 PA-PP的压降最大,但饱和效率最高,平均保水量和比耗更低。 PU提供的气流阻力最小,具有中等效率水平,高耗水量和保水能力。 PR表现出最差的饱和效率,中等水平的压降和高耗水量。

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