都市風場中建蔽率改變對街谷中空氣污染擴散影響之探討

董子維

doi:10.6841/NTUT.2011.00593

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都市風場中建蔽率改變對街谷中空氣污染擴散影響之探討

The Effect of Building Coverage Ratio Variation in Urban Wind Field of Air Pollution Dispersion in Street Canyon

董子維 , Masters　　Advisor：黃志弘　　

繁體中文 DOI： 10.6841/NTUT.2011.00593

建蔽率；開發強度；街道峽谷；空氣污染；計算流體動力學； building coverage ratio ； development intensity ； street canyon ； air pollution ； CFD

Abstract │ Reference (53) │ Times Cited (1)

Abstract 〈TOP〉

Parallel Abstract 〈TOP〉

Urban wind field has a dramatic effect on the climate. Lately, urban air pollution has become far worse as more high-rises dot the city skyline. Not to mention the population concentration induced increased traffic flow and the negative effects brought on by the street canyon model. However, the effects of urban development and building massing regulations on urban micro-climate are still getting little attention. 
This study uses Computational Fluid Dynamics (CFD) simulations to describe flow fields and pollutant distribution (NO2). Also, the study focuses on the coverage ratio and development intensity as well as their correlation with different street canyon and urban fabric to understand the accumulation and distribution of pollutants in a wind field. In addition, the study has found that when a street canyon is exposed to traffic pollutants, the coverage ratio and development intensity would change the wind velocity, concentration, pollution accumulation as well as stack height. Moreover, pollution concentration is higher on the leeward side than on the windward side of the street. On top of that, decreased coverage ratio and development intensity cannot improve the average pollution concentration level.
The coverage ratio and development intensity have insignificant effect on the dispersion of pollution concentration. On account of that, to improve the urban climate, thus creating an eco-city, needs us to draw solutions such as aligning streets with the prevailing wind, seeking for a better ventilation strategy, and lower the local effect of pollutants.

Reference ( 53 ) 〈TOP〉

[15] 黃志弘、蔡豐懋、蘇彥豪，「建築物量體造形改變對周邊懸浮微粒分佈之影響」，中華民國建築學會建築學報，第五十八期，2006，第95-112頁。
連結：
[16] 鄭啟明、羅元隆，「風力規範之標準地況分類與紊流邊界層特性研究」，中華民國建築學會建築學報，第八期，2009，第103~120 頁。
連結：
[17] 陳姿汶、謝伸裕，「都市空氣污染環璄中居住與運動探討」，輔仁大學體育學刊，建築學報第68期增刊，2009，第278-288頁。
連結：
[22] 邱英浩、吳孟芳、譚政泓，「不同街谷形式對都市風場之影響」，建築與規劃學報，第九卷，第二期，2008，第141-166 頁。
連結：
[26] Blocken B, Carmeliet J, Stathopoulos "CFD evaluation of wind speed conditions in passages between paralle buildings – effect of wall-function roughness modifications for the atmospheric boundary layer flow" Technometrics, vol. 95, no. 9, 2007, pp. 941-962.
連結：

Times Cited (1) 〈TOP〉

陳怡君(2012)。建築量體配置對都市開放空間風環境影響之研究—以台北市社子島規劃為例。臺北科技大學建築與都市設計研究所學位論文。2012。1-115。

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