Frontiers of Architectural Research Pub Date : 2021-02-19 , DOI: 10.1016/j.foar.2021.01.006 Fabio Fantozzi , Carlo Bibbiani , Caterina Gargari , Roberto Rugani , Giacomo Salvadori
Green roofs represent a growing technology that is spreading increasingly and rapidly throughout the building sector. The latest national and international regulations are promoting their application for refurbishments and new buildings to increase the energy efficiency of the building stock. In recent years, vegetative coverings have been studied to demonstrate their multiple benefits, such as the reduction of the urban heat island phenomenon and the increase in the albedo of cities. On the contrary, this study aims to verify the actual benefit of applying a green roof on a sloped cover compared with installing a highly insulated tiled roof. The EnergyPlus tool has been used to perform dynamic analyses, which has allowed to understand the behavior of two different stratigraphies in accordance with weather conditions, rain, and irrigation profiles. Results have shown that the installation of a green roof cannot always be considered the best solution for reducing building energy consumption, especially if compared with a classic highly insulated clay tile roof. In terms of summer air conditioning, the maximum saving is 0.72 kWh/m2. The presence of water in the soil has also been proven a crucial factor.
中文翻译:
在地中海气候下,绿色屋顶真的能显着节约能源吗?基于不同案例研究的批判性评估
绿色屋顶代表了一种不断发展的技术,它在整个建筑领域越来越迅速地传播。最新的国家和国际法规正在推动它们在翻新和新建建筑中的应用,以提高建筑群的能源效率。近年来,人们对植被覆盖进行了研究,以证明其具有多重效益,例如减少城市热岛现象和增加城市反照率。相反,本研究旨在验证与安装高度绝缘的瓦片屋顶相比,在倾斜覆盖物上应用绿色屋顶的实际好处。EnergyPlus 工具已被用于执行动态分析,它允许根据天气条件、降雨和灌溉剖面了解两个不同地层的行为。结果表明,安装绿色屋顶并不总是被认为是降低建筑能耗的最佳解决方案,尤其是与经典的高绝缘粘土瓦屋顶相比。夏季空调方面,最大节电0.72千瓦时/米2 . 土壤中水的存在也已被证明是一个关键因素。