Building characteristics as determinants of propensity to high indoor summer temperatures in London dwellings
Building characteristics as determinants of propensity to high indoor summer temperatures in London dwellings
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DOI：
10.1016/j.buildenv.2011.12.003
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发表时间：
2012-09-01
影响因子：
7.4
通讯作者：
Oikonomou, Eleni
中科院分区：
文献类型：
--
作者：
Mavrogianni, Anna;Wilkinson, Paul;Oikonomou, Eleni
由于气候变化和城市热岛现象，预计城市将面临越来越大的过热风险。虽然外部因素，如城市形态和绿化，可能会影响过热风险的时空变化，个别建筑物的特点也可能是重要的。本文介绍的结果EnergyPlus动态热模拟的3456个组合的住宅类型和特征选择代表伦敦国内股票。两个设计夏季年天气文件被用来代表当前和未来的气候：CIBSE 1984-2004和UKCP 09未来天气文件（外部温度的第50百分位数，2050年代，中等排放情景）。住宅类型之间的变化是可观的，但通常住宅类型内的变化更大，这取决于这些因素，如方向，周围的建筑物和绝缘水平。在目前的气候条件下，隔热水平对室内温度有相当大的影响，屋顶隔热和窗户升级的组合改造在最温暖的连续5天建模期间降低了白天起居室的温度，平均为0.76摄氏度（%95C.I。0.63，0.89 ℃）和1.30 ℃（%95C.I. 1.05、1.54摄氏度）的最高温度。另一方面，内部改造的墙壁和地板往往会增加白天客厅的温度，综合影响为0.46摄氏度（%95C.I。0.33，0.60 ℃）和0.71 ℃（%95C.I. 0.47、0.96）最高温度升高。在气候变化的背景下，了解改造后的绝缘特性对于准确识别具有最大过热潜力的住宅至关重要。(C)2011爱思唯尔有限公司保留所有权利。
Cities are expected to experience an increasing risk of overheating due to climate change and the urban heat island phenomenon. Although external factors, such as urban morphology and greening, may influence the spatio-temporal variation of overheating risk, the individual building characteristics are also likely to be important. This paper presents the results of EnergyPlus dynamic thermal simulations of 3456 combinations of dwelling types and characteristics selected to represent the London domestic stock. Two Design Summer Year weather files were used to represent the current and future climate: the CIBSE 1984-2004 and a UKCP09 future weather file (50th percentile of external temperature, 2050s, medium emissions scenario). Appreciable variation between dwelling types but generally greater variation within dwelling type was found depending on such factors as orientation, surrounding buildings and insulation levels. Under the current climate, the insulation levels had considerable impact on indoor temperatures, with combined retrofitting of roof insulation and window upgrades reducing daytime living room temperatures during the warmest continuous 5-day period of modelling by, on average, 0.76 degrees C (%95C.I. 0.63, 0.89 degrees C) for mean temperature and 1.30 degrees C (%95C.I. 1.05, 1.54 degrees C) for maximum temperature. On the other hand, internally retrofitted walls and floors tended to increase daytime living room temperatures, with a combined effect of 0.46 degrees C (%95C.I. 0.33, 0.60 degrees C) increase in mean temperature and 0.71 degrees C (%95C.I. 0.47, 0.96) increase in maximum temperature. Within the context of a changing climate, knowledge of insulation characteristics after retrofitting is crucial for the accurate identification of dwellings with greatest overheating potential. (C) 2011 Elsevier Ltd. All rights reserved.