Investigation of typical residential block typologies and their impact on pedestrian-level microclimate in summers in Nanjing,China

• 作者: Mingjie Zhang Wei You Qin Qin Dandan Peng Youpei Hu Zhi Gao Riccardo Buccolieri
• 来源期刊: 建筑学研究前沿（英文版）
• 年，卷（期）: 2022,（4）
• 所属期刊栏目: INDEX
• 页码范围: 278-296
• 页数: 19页
• 语种: 英文

摘要

The morphology of urban residential blocks in China,which is strictly affected by regulations,can potentially improve or deteriorate microclimates.This paper first proposes a framework for identifying typical residential block typologies using Nanjing as an example.A thorough investigation,consisting of 114 samples,was conducted,and 18 typical residential block typologies were summarized.Second,3D non-isothermal numerical simulations were performed on the hottest days of summer using the ENVI-met.The effect of morphological indices on the microclimate at the pedestrian level was explored using statistical methods and a novel graphic method named m-SpaceMate.The results revealed a strong correlation be-tween the urban heat island intensity(UHII),mean radiation temperature,and universal ther-mal climate index(UTCI)and floor area ratio(FAR),as well as between wind velocity(U)and building coverage ratio(BCR).A significant increase in FAR(by approximately 1.0)can result in a low UTCI that was driven by MRT and shading conditions.Six-floor blocks,with FAR between 1.8 and 2.1,had a better overall thermal environment(except for lower U)than that of 11-floor blocks.When considering a similar BCR,blocks with slab-type buildings tended to have a U that was higher by approximately 30％.