Future probabilistic hot summer years for overheating risk assessments

Future probabilistic hot summer years for overheating risk assessments
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过热风险评估的未来概率炎热夏季

DOI:
10.1016/j.buildenv.2016.05.028
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发表时间:
2016
影响因子:
7.4
通讯作者:
Liu C
Liu C
中科院分区:
工程技术1区
文献类型:
--
作者:
Liu C

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正如 2003 年巴黎热浪所显示的那样,建筑物内的高温可能导致数千人死亡。这使得过热风险的评估成为一项至关重要的工作。不幸的是,当前创建用于评估过热的示例天气时间序列的方法基于单一天气变量,因此仅基于一种不适或死亡的驱动因素。在本研究中,提出了两种用于开发当前和未来天气文件的替代方法:一种(pHSY-1)基于加权冷却度小时(WCDH),另一种(pHSY-2)基于生理等效温度(PET)。为 14 个地点生成了 pHSY-1 和 pHSY-2 文件。然后将它们与现有的概率未来设计夏季年 (pDSY) 和概率未来测试参考年进行比较。结果发现,pHSY-1 和 pHSY-2 都比 pDSY 更稳健。建议pHSY-1可用于评估过热的严重程度和发生情况,而pHSY-2可用于评估热不适或热应激。研究结果还凸显了使用不同指标来比较过热年份的一个重要局限性。如果天气年是通过单个环境变量的排名创建的,为了确保建筑物的结果评估一致,应使用类似的单一指标(例如,>28°C 的小时数或 WCDH),但如果天气年是基于多个环境变量,则应使用复合指标(例如 PET 或 Fanger 的 PMV)。这对于热舒适分析天气文件的适用性具有重要意义。
As the 2003 Paris heatwave showed, elevated temperatures in buildings can cause thousands of deaths. This makes the assessment of overheating risk a critical exercise. Unfortunately current methods of creating example weather time series for the assessment of overheating are based on a single weather variable, and hence on only one driver of discomfort or mortality. In this study, two alternative approaches for the development of current and future weather files are presented: one (pHSY-1) is based on Weighted Cooling Degree Hours (WCDH), the other (pHSY-2) is based on Physiologically Equivalent Temperature (PET). pHSY-1 and pHSY-2 files were produced for fourteen locations. These were then compared with the existing probabilistic future Design Summer Year (pDSY) and the probabilistic future Test Reference Year. It was found that both pHSY-1 and pHSY-2 are more robust than the pDSY. It is suggested that pHSY-1 could be used for assessing the severity and occurrence of overheating, while pHSY-2 could be used for evaluating thermal discomfort or heat stress. The results also highlight an important limitation in using different metrics to compare overheating years. If the weather year is created by a ranking of a single environmental variable, to ensure consistent results assessment of the building should be with a similar single metric (e.g. hours >28 °C or WCDH), if however the weather year is based upon several environmental variables then a composite metric (e.g. PET or Fanger’s PMV) should be used. This has important implications for the suitability of weather files for thermal comfort analysis.
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