Using localised weather files to assess overheating in naturally ventilated offices within London's urban heat island
Using localised weather files to assess overheating in naturally ventilated offices within London's urban heat island
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DOI：
10.1177/0143624411416064
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发表时间：
2012-11
影响因子：
1.7
通讯作者：
C. Demanuele;A. Mavrogianni;M. Davies;M. Kolokotroni;I. Rajapaksha
中科院分区：
文献类型：
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作者：
C. Demanuele;A. Mavrogianni;M. Davies;M. Kolokotroni;I. Rajapaksha
与周围的农村地区相比，城市环境通常经历增加的平均空气温度-这种现象被称为城市热岛（UHI）。城市热岛效应对自然通风建筑舒适性的影响是本文的主要关注点。由于城市热岛效应和气候变化的共同影响，城市建筑物的过热风险可能会在未来加剧。在伦敦的此类建筑物的设计中，通常的当前做法是将使用一个通用天气文件视为足以表示外部温度。然而，这里报告的工作表明，在伦敦内不同地点的标准建筑物的过热性能之间存在相当大的差异。这意味着，例如，由于使用了不适当的通用天气文件，建筑物可能错误地通过或未通过用于证明符合建筑法规的标准。因此，这项工作具有重要的政策意义。实际应用：大伦敦管理局最近与特许建筑服务工程师协会一起为开发商制定了指导方针，通过提供与伦敦三个区域有关的天气文件来解决建筑物过热的风险。虽然这一举措是受欢迎的，但可能更可取的是根据建筑物位置定制的天气文件。当然，这将使这一进程更加复杂，必须考虑到这种办法的可行性。然而，本文中提出的工作表明，应认真考虑将定制的天气数据用于监管目的。
Urban environments typically experience increased average air temperatures compared to surrounding rural areas – a phenomenon referred to as the Urban Heat Island (UHI). The impact of the UHI on comfort in naturally ventilated buildings is the main focus of this article. The overheating risk in urban buildings is likely to be exacerbated in the future as a result of the combined effect of the UHI and climate change. In the design of such buildings in London, the usual current practice is to view the use of one generic weather file as being adequate to represent external temperatures. However, the work reported here demonstrates that there is a considerable difference between the overheating performance of a standard building at different sites within London. This implies, for example, that a building may wrongly pass or fail criteria used to demonstrate compliance with building regulations as a result of an inappropriate generic weather file being used. The work thus has important policy implications. Practical application: The Greater London Authority has recently developed, with the Chartered Institute of Building Services Engineers, guidance for developers to address the risk of overheating in buildings via the provision of weather files for London relating to three zones. While such an initiative is welcomed, it may be that a weather file tailored to the building location would be preferable. Of course, this would add further complexity to the process and a view would have to be taken as the viability of such an approach. The work presented in this article, however, suggests that serious consideration should be given to the use of tailored weather data for regulatory purposes.