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Improving the Efficiency of Green Roofs Using Atmospheric Water Harvesting Systems (an Innovative Design)
Water ( IF 3.4 ) Pub Date : 2021-02-20 , DOI: 10.3390/w13040546
Behrouz Pirouz , Stefania Anna Palermo , Michele Turco

Conventional green roofs, although having numerous advantages, could place water resources under pressure in dry periods due to irrigation requirements. Moreover, the thermal efficiency of green roofs could decrease without irrigation, and the plants could get damaged. Therefore, this study aims to improve the efficiency of conventional green roofs by proposing a new multipurpose green roof combined with fog and dew harvesting systems. The analysis determined that the average water use of green roofs in the summer (in humid regions) is about 3.7 L/m2/day, in the Mediterranean regions about 4.5 L/m2/day, and in arid regions about 2.7 L/m2/day. During the dry season, the average fog potential in humid regions is 1.2 to 15.6 L/m2/day, Mediterranean regions between 1.6 and 4.6 L/m2/day, and arid regions between 1.8 and 11.8 L/m2/day. The average dew potential during the dry season in humid regions is 0.1 to 0.3 L/m2/day, in the Mediterranean regions is 0.2 to 0.3 L/m2/day, and in the arid regions is 0.5 to 0.7 L/m2/day. The analysis of the suggested multipurpose green roof combined with fog/dew harvesting systems, in the summer, in three different climates, show that fog harvesting could provide the total water requirement of the green roofs, and that dew harvesting by PV (photo-voltaic) panels could provide 15 to 26% of the water requirements. Moreover, it could show a higher thermal impact on the building, higher efficiency in stormwater management, less dependence on the urban water network, and greater efficiency in decreasing urban air, water, and noise pollution. Finally, the novel green roof system could consume less water due to the shaded area by mesh and solar PVs and maximize the utilization of the roof area, as solar panels could be applied on the same green roof.

中文翻译:

使用大气集水系统提高绿色屋顶的效率(创新设计)

常规的绿色屋顶尽管具有许多优点,但由于灌溉需求,可能会使水资源在干旱时期处于压力之下。此外,如果不进行灌溉,绿色屋顶的热效率可能会降低,并且植物可能会遭到破坏。因此,本研究旨在通过提出一种新的多用途绿化屋顶结合雾和露水收集系统来提高常规绿化屋顶的效率。分析确定,夏季(潮湿地区)绿色屋顶的平均用水量约为3.7 L / m 2 /天,地中海地区约为4.5 L / m 2 /天,而干旱地区约为2.7 L / m 2 /天。 m 2 /天。在干旱季节,潮湿地区的平均雾势为1.2至15.6 L / m 2/天,地中海地区介于1.6和4.6 L / m 2 /天之间,干旱地区介于1.8和11.8 L / m 2 /天之间。干旱地区在干燥季节的平均露水势为0.1至0.3 L / m 2 /天,在地中海地区为0.2至0.3 L / m 2 /天,在干旱地区为0.5至0.7 L / m 2/天。在夏季,在三种不同的气候下,对建议的多功能绿化屋顶结合雾/露水收集系统的分析表明,雾收集可以提供绿色屋顶的总需水量,而PV收集的露水可通过光伏(光伏)面板可提供15%至26%的水需求量。此外,它对建筑物的热影响更大,雨水管理的效率更高,对城市供水网络的依赖性更低,减少城市空气,水和噪音污染的效率更高。最后,由于太阳能电池板可以应用于同一绿色屋顶,因此新颖的绿色屋顶系统由于网格和太阳能PV的阴影区域而可以消耗较少的水,并且可以最大限度地利用屋顶区域。
更新日期:2021-02-21
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