Combined strategies of void layout and urban planning on air ventilation and pollutant removal in deep canyons

IF 7.6 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Building and Environment Pub Date : 2025-06-10 DOI:10.1016/j.buildenv.2025.113284

An-Shik Yang , Zhengtong Li , Hong-Hsiang Wang , Chih-Yung Wen , Yuan-Lung Lo , Yee-Ting Lee

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Abstract

The perceptiveness and implementation of enhancing city breathability and urban air quality are crucial to attain a more resilient built environment. This study conducts the CFD parametric analysis to evaluate the relations of varied void layouts and urban patterns with ventilation performance for pollution mitigation. To provide the helpful guidelines in the planning and design of street canyons toward more sustainable cities, the indices of ACH and ACH_PFR are thoroughly analyzed to appraise the improvement of urban aeration and control of pollutant dispersal. The placement of 12.5 m × 12.5 m voids at a height of 45 m on upstream buildings can increase the air exchange rate and purging flow rate by 20.4% and 24.5% in comparison to those without voids. The strategy of incorporating concentrated square voids into upstream buildings at medium heights can realize the percentage increases of 51.5% in ACH and 188.1% in ACH_PFR, promoting city breathability and sustainable development in dense urban environments.

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孔洞布局与城市规划对深谷通风与污染物去除的组合策略

提高城市透气性和城市空气质量的洞察力和实施对于获得更具弹性的建筑环境至关重要。本研究通过CFD参数分析，评价不同空隙布局和城市格局与通风性能之间的关系。为了更好地指导城市可持续发展的规划和设计，本文分析了ACH和ACHPFR的指标，以评价城市通风的改善和污染物扩散的控制。上游建筑在45 m高度设置12.5 m × 12.5 m的空腔，与不设置空腔相比，空气交换率和净化流量分别提高20.4%和24.5%。在中高上游建筑中加入集中的广场孔洞策略，可实现ACH和ACHPFR分别提高51.5%和188.1%的百分比，促进密集城市环境下的城市透气性和可持续发展。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Building and Environment 工程技术-工程：环境

CiteScore

12.50

自引率

23.00%

发文量

1130

审稿时长

27 days

期刊介绍： Building and Environment, an international journal, is dedicated to publishing original research papers, comprehensive review articles, editorials, and short communications in the fields of building science, urban physics, and human interaction with the indoor and outdoor built environment. The journal emphasizes innovative technologies and knowledge verified through measurement and analysis. It covers environmental performance across various spatial scales, from cities and communities to buildings and systems, fostering collaborative, multi-disciplinary research with broader significance.