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首页> 外文期刊>Building and Environment >Quantifying the direct benefits of cool roofs in an urban setting: Reduced cooling energy use and lowered greenhouse gas emissions
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Quantifying the direct benefits of cool roofs in an urban setting: Reduced cooling energy use and lowered greenhouse gas emissions

机译：量化城市环境中凉爽屋顶的直接收益：减少冷却能源的使用并减少温室气体的排放

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Cool roofs, cool pavements, and urban vegetation reduce cooling energy use in buildings, lower local air pollution, and decrease greenhouse gas (CHG) emissions from urban areas. To promote widespread and large-scale implementation of cool roofs to moderate urban heat-island phenomenon, more awareness and understanding of cool roof benefits at the local level is needed. As part of an investigation of strategies to mitigate urban heat-island effects, field data gathered from a monitoring project on cool roofs in India were reviewed. An innovative field-based analytical method was developed to quantify cooling energy savings resulting from the installation of cool roofs on commercial buildings. For buildings monitored in the Metropolitan Hyderabad region, the measured annual energy savings from roof-whitening of previously black roofs ranged from 20 to 22 kWh/m~2 of roof area, corresponding to a cooling energy use reduction of 14-26%. The application of white coatings to uncoated concrete roofs resulted in annual savings of 13-14 kWh/m~2 of roof area, corresponding to cooling energy savings of 10 -19%. The annual direct CO_2 reductions associated with the reduced cooling energy use were estimated to be 11-12 kg CO_2/m~2 of flat roof area. Additional field work on various building types and locations will help to understand magnitudes of regional or global potential in energy savings and GHG emission reductions from applying cool roofs. Knowledge about quantified cool roof benefits at both the local and regional level may promote the formulation of new policies and programs throughout the world.
机译：凉爽的屋顶，凉爽的人行道和城市植被减少了建筑物中的冷却能源使用量，降低了局部空气污染，并减少了城市地区的温室气体（CHG）排放。为了促进凉爽屋顶的广泛和大规模实施以缓和城市热岛现象，需要在地方层面上更多地认识和理解凉爽屋顶的好处。作为对减轻城市热岛效应策略的调查的一部分，对从印度凉爽屋顶监测项目收集的现场数据进行了回顾。开发了一种创新的基于现场的分析方法，以量化因在商业建筑上安装冷屋顶而节省的冷却能源。对于在海得拉巴大都会地区进行监控的建筑物，以前黑屋顶的屋顶变白所测得的年度节能量为20至22 kWh / m〜2屋顶面积，相当于减少了14-26％的冷却能耗。在未涂层的混凝土屋顶上使用白色涂料可每年节省屋顶面积13-14 kWh / m〜2，相当于节省10 -19％的冷却能源。与减少的冷却能源使用相关的年度直接CO_2减少量估计为平屋顶面积11-12 kg CO_2 / m〜2。在各种建筑物类型和位置上进行的其他现场工作将有助于了解区域或全球通过采用凉爽的屋顶在节能和减少温室气体排放方面的潜力。在地方和地区层面上有关量化的冷却屋顶收益的知识可能会促进全世界制定新的政策和计划。

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