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  • 學位論文

街廓量體變化對都市氣候縮流及渠化效應被動應用之研究

The Passive Utilization of venturi effect and channel effect on Urban Wind Field

指導教授 : 黃志弘

摘要


都市流場流佈狀態,深受都市街廓量體的配置與建築造型影響,大尺度層級探討都市流場、氣候因子、邊界條件狀態的分析,到小尺度(微氣候尺度)中的街廓排列與建築量體對環境流場的影響,透過連續尺度思考,整合都市、建築及環境規劃設計探討,因應高都市化對環境所造成的衝擊。都市發展形態、人文活動與氣象因子影響下,導致都市環境惡化,近年來懸浮微粒(PM10)是造成都市環境污染物主要來源,造成空氣污染物擴散不易,研究主要探討都市地區(住宅區、工業區)的汙染擴散模式,探討近地表風場、流場(速度場、濃度場)擴散現象、壓力分布情形, 並在夏季盛行風下,藉由建築量體改變與法定空地、綠地配置退縮,是否能夠加速將都市污染物迅速帶離,進而改善都市環境品質。 研究藉由計算流體力學模擬軟體((Computational Fluid Dynamics,簡稱CFD))模擬探討都市污染擴散模式,藉由設計、分析、整合、風險評估、氣象、檢監測結果、模擬等科學性數據作為研究主軸,建立鑑定污染來源應變分析機制,未來透過都市計畫與都市設計管制,有效控管改善都市流場的運作模式,降低都市空氣污染對週遭學校、住宅區、醫院之影響,提高對環境永續經營發展。 研究結論如下: 一、夏季西南季風下改變街廓建築量體造型,加速縮流效應、渠化效應的影響。 二、都市法定空地、綠地的配置、對於縮流效應、渠化效應的有顯著影響。 三、都市污染物濃度受縮流效應、渠化效應影響並降低街道峽谷效應對污染物沉積的影響與都市熱島效應。

並列摘要


Urban wind field was affected by urban street blocks and building structure. Study the urban wind flow from large scale to small-scale (Microclimate scale) investigate the urban basic flow field like boundary conditions, street blocks arrangement and building style flow phenomena. Study through the variable scale investigations urban, architecture and environmental planning and design. Prevent urbanization impact on the environment. From many factor like urban development pattern , human activity and meteorological lead to deterioration of urban environment. Suspended particles(PM10)have already become air pollution index of urban air quality and it is also dangerous pollutant for human health. The air pollution was not easy to Spread. To know about urban wind field and concentration field we change building structure and statutory vacant land、green land to add to venturi effect and channel effect. In the summer monsoon effect, it can took away air pollution accelerate and improve urban environmental. The research using software called Computational Fluid Dynamics (CFD) to study industrial areas air pollutants emission. The key technology gained from this project will be a much more powerful tool for air pollutants emission and diffusion prevention. It can be further applied to any other air pollutants in various industrial areas for urban planning investigation procedure. In future use the urban planning and urban design to control urban wind filed,reduce the environmental impact in order to improve the quality of urban environment and the realization of sustainable urban development. The results of study show: 1. In the summer southwest monsoon, change of street blocks and building structures shape, speed up the venturi effect and channel effect 2. Urban open space and green space configuration can add the venturi effect and channel effect in street block . 3. The venturi effect and channel effect was affected of street canyon and urban heat island effect that on air pollutant concentration and temperature have a significant improvement.

參考文獻


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被引用紀錄


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〔碩士論文,國立臺北科技大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0006-1607201210381300

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