Effectiveness of Green Roofs and Green Walls on Energy Consumption and Indoor Comfort in Arid Climates
Effectiveness of Green Roofs and Green Walls on Energy Consumption and Indoor Comfort in Arid Climates
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DOI：
10.28991/cej-03091158
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发表时间：
2018-10
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影响因子：
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通讯作者：
Sherine Wahba;Basil Kamel;K. Nassar;A. Abdelsalam
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文献类型：
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作者：
Sherine Wahba;Basil Kamel;K. Nassar;A. Abdelsalam
城市化的加剧对人类福祉、城市基础设施、电力使用和室内温度的升高产生了许多负面影响。一种解决方案可能是改造现有建筑，在屋顶和墙壁上种植一层植物，这可能会提高建筑性能，减少消耗并改善室内舒适度。拥有高层建筑的城市可能更适合实施绿墙，因为它有更多的面积来产生影响。本文通过考虑开罗市三种典型类型的住宅建筑作为案例研究，研究了在埃及炎热干旱气候下在建筑上添加绿色植物的节能优势。本研究选择Designbuilder软件来模拟所选择的建筑。结果表明，在干旱气候条件下，土壤厚度为15cm时效果较好。当使用传统的外部围护结构时，基本情况下的年用电量为52千瓦时/平方米，当整个建筑（屋顶和墙壁）增加植被层时，年用电量下降到43千瓦时/平方米，当增加植被层时，年用电量每年减少17%至25%。除了将室内热舒适度提高3个PMV值和室内空气温度提高5°C之外。
Increased urbanization have many negative effects on human well-being, city infrastructure, electricity usage and the increase of indoor temperatures. A solution may be to retrofit existing buildings, with implementing a vegetated layer to roofs and walls, this may enhance building performance, reduce consumption and improve indoor comfort. Cities with tall buildings may be more adequate to implement a green-wall as it have more area to make impact. This paper examines the energy reduction advantages of adding greenery on buildings in the hot arid climate of Egypt by considering three typical types of residential buildings in the city of Cairo as a case study. Designbuilder software was selected to stimulate the buildings chosen in this research. The results shows that an extensive soil thickness of 15cm performs better in the arid climates. electricity consumption for the base case is 52 kWh/m2 annually when used a traditional external envelop and dropped to 43 kWh/m2 when a vegetated layer added to the whole building (roof & wall), annual electricity consumption reduced by 17% to 25% per annum when added a vegetated layer. In addition to enhancing the indoor thermal comfort by 3 PMV values and indoor air temperature by 5°C.