郑颖生 史源 任超 吴恩融

Zheng Yingsheng, Shi Yuan, Ren Chao, NG Edward

关键词：高密度区域；通风；高温高湿夏季；形态优化；量化评估；流体动力学模拟

Keywords：High-density Areas; Ventilation; Hot and Humid Summer; Morphological Optimization; Quantitative Evaluation; CFD Simulation

摘要：

??高速的城市化进程，改变了城市的地表材质和空间结构，引发城市气候的改变。我国众多城市呈现升温趋势，夏季高温问题尤为严峻。研究证实，促进区域通风是改善亚热带高温高湿夏季条件下人体舒适度的最有效方法之一。基于改善城市夏季气候条件并保障城市环境健康的目的，本文选取香港新界大埔墟地区为例，探讨如何通过促进夏季通风，改善区域微气候条件，为亚热带高密度城市的可持续规划以及区域城市更新提供思路参考。首先，根据建筑平均高度及覆盖率，在大埔墟地区研究范围内划分多层高密度区、高层中密度区，以及开阔区三个区域类型，进行行人层高度的风环境分析；然后，基于上述分析，探讨如何通过城市用地置换、街区形态及建筑形态改造等策略改善区域通风条件，以达到缓解夏季高温的目的；最后，选取城市更新前后的经济技术指标、天空视域因子（SVF: Sky View Factor）以及行人层高度的风速（通过流体动力学模拟获得）三种类型参量进行量化比较，验证在高密度建设的前提下，通过优化城市形态达到改善区域夏季通风的可行性。??

Abstract：

??The process of urbanization has changed the surface properties and spatial structures of urban areas, and accordingly, induced urban climate change. A warming trend has been observed in many cities of China, associated with severe heat events in summer. Previous studies have found that improving air ventilation in one of the most effective methods to enhance thermal comfort under the hot and humid summer of subtropical cities. Aiming at improving urban microclimate and enhancing human thermal comfort, this paper develops urban regeneration strategies based on the case study of Tai Po Market in Hong Kong. Firstly, the three zones of Tai Po Market: compact mid-rise zone, open high-rise zone and sparsely built zone are defined and analyzed in the aspects of urban morphology and microclimate. Secondly, land use change, traffic reorganization and building transformation are recommended for solving the existing air ventilation problems in Tai Po Market. Finally, Economic and technical indexes, Sky View Factor, and wind speed at pedestrian level (based on computational fluid dynamics simulation results) are compared to verify the possibility of wind environment improvement through urban morphology optimization under the same density.

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??郑颖生（通信作者），香港中文大学建筑学院，博士研究生。zhengyingsheng@gmail.com

史源，香港中文大学建筑学院，博士研究生。shiyuan.arch.cuhk@gmail.com

任超，香港中文大学建筑学院，助理教授，香港中文大学环境、能源及可持续发展研究研究员。renchao@cuhk.edu.hk

吴恩融，香港中文大学建筑学院，教授，香港中文大学环境、能源及可持续发展研究所管理委员会委员、研究员。edwardng@cuhk.edu.hk

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• ??[1] Intergovernmental Panel on Climate Change. Climate Change 2013: The

  Physical Science Basis[R/OL]. [2013-11]. http://www.climatechange2013.

  org/images/report/WG1AR5_ALL_FINAL.pdf.

  [2] 杜春丽. 我国城市气候变化特征及水汽图像的分析[D]. 南京: 南京信

  息工程大学, 2008.

  [3] 付雪婷, 薛静, 王青, 等. 城市热岛效应与健康[J]. 国外医学: 医学地

  理分册, 2004, 25(1): 43-45.

  [4] Tan J, Zheng Y, Tang X, et al. The Urban Heat Island and Its Impact on

  Heat Waves and Human Health in Shanghai[J]. International Journal of

  Biometeorology, 2010, 54(1): 75-84.

  [5] Goggins W B, Chan E Y Y, Ng E, et al. Effect Modification of the

  Association Between Short-term Meteorological Factors and Mortality by

  Urban Heat Islands in Hong Kong[J]. PloS one, 2012, 7(6): e38551.

  [6] HKSAR. Hong Kong Planning Standards and Guidelines[EB/OL]. [2014-

  02]. http://www.pland.gov.hk/pland_en/tech_doc/hkpsg/.

  [7] 任超, 吴恩融. 城市环境气候图——可持续城市规划辅助信息系统工

  具[M]. 北京: 中国建筑工业出版社, 2012.

  [8] 任超, 吴恩融, Katzschner Lutz, 等. 城市环境气候图的发展及其应用

  现状[J]. 应用气象学报, 2012, 23(5): 593-603.

  [9] HKSAR. Building Design to Foster a Quality and Sustainable Built

  Environment[EB/OL]. [2011-01]. http://www.bd.gov.hk/english/

  documents/pnap/APP/APP151.pdf.

  [10] HKSAR. Sustainable Building Design Guidelines[EB/OL]. [2011-01].

  http://www.bd.gov.hk/english/documents/pnap/APP/APP152.pdf.

  [11] Ng E, Yuan C, Chen L, et al. Improving the Wind Environment in High-density

  Cities by Understanding Urban Morphology and Surface Roughness: A Study

  in Hong Kong[J]. Landscape and Urban Planning, 2011, 101(1): 59-74.

  [12] Landsberg H E. The Urban Climate[M]. Academic Press, 1981.

  [13] Gago E J, Roldan J, Pacheco-Torres R, et al. The City and Urban Heat

  Islands: A Review of Strategies to Mitigate Adverse Effects [J]. Renewable

  and Sustainable Energy Reviews, 2013, 25: 749-758.

  [14] Ng E. Air Ventilation Assessment System for High Density Planning and

  Design[C] // Proceedings of PLEA International Conference, 2006.

  [15] H?ppe P. The Physiological Equivalent Temperature: A Universal Index

  for the Biometeorological Assessment of the Thermal Environment[J].

  International Journal of Biometeorology, 1999, 43(2): 71-75.

  [16] Stathopoulos T, Wu H, Zacharias J. Outdoor Human Comfort in an Urban

  Climate[J]. Building and Environment, 2004, 39(3): 297-305.

  [17] Cheng V, Ng E, Chan C, et al. Outdoor Thermal Comfort Study in a

  Sub-tropical Climate: A Longitudinal Study Based in Hong Kong[J].

  International Journal of Biometeorology, 2012, 56(1): 43-56.

  [18] Ng E, Cheng V. Urban Human Thermal Comfort in Hot and Humid Hong

  Kong[J]. Energy and Buildings, 2012, 55(10): 51-65.

  [19] Cheng V, Ng E. Thermal Comfort in Urban Open Spaces for Hong Kong[J].

  Architectural Science Review, 2006, 49(3): 236-242.

  [20] Ng, E. Designing High-Density Cities: For Social and Environmental

  Sustainability[M]. Routledge, 2009.

  [21] HKSAR. Hong Kong 2006 Population Census - Key Statistics[R/OL].

  [2007-02]. http://www.statistics.gov.hk/pub/B11200372006XXXXB0100.

  pdf.

  [22] 袁超. 缓解高密度城市热岛效应规划方法的探讨——以香港城市为例[J].

  建筑学报, 2010(1): 120-123.

  [23] Chen L, Ng E, An X, et al. Sky View Factor Analysis of Street Canyons

  and Its Implications for Daytime Intra-urban Air Temperature Differentials

  in High-rise, High-density Urban Areas of Hong Kong: A GIS-based

  Simulation Approach[J]. International Journal of Climatology, 2012, 32(1):

  121-136.

  [24] Svensson M K. Sky View Factor Analysis–Implications for Urban Air

  Temperature Differences[J]. Meteorological Applications, 2004, 11(3):

  201-211.

  [25] 史源, 任超, 吴恩融. 基于室外风环境与热舒适度的城市设计改进策

  略——以北京西单商业街为例[J]. 城市规划学刊, 2012(5): 92-98.

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