Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/5436
DC FieldValueLanguage
dc.contributor.advisor莊秉潔zh_TW
dc.contributor.advisorBen-Jei Tsuangen_US
dc.contributor.author蔡郅隆zh_TW
dc.contributor.authorTsai, Chih-Lungen_US
dc.date2005zh_TW
dc.date.accessioned2014-06-06T06:34:47Z-
dc.date.available2014-06-06T06:34:47Z-
dc.identifier.urihttp://hdl.handle.net/11455/5436-
dc.description.abstract國內常運用空品、氣象模式及高斯煙流軌跡(如GTx)等模式,並配合氣象資料,來模擬採樣期間,污染物之順軌跡路徑及當時排放源附近地區的氣象場,繪製污染物濃度圖、軌跡模擬圖等以分析污染物變化趨勢,探討形成污染物之來源,分析污染源及區域性累積濃度對周界地區的影響。 許多研究顯示挾帶污染物的氣流在通過建築物時會發生分離流的現象,由於氣流的分離作用,在建築物的下風處形成一個空穴(cavity),其對上風處煙柱的擴散作用將產生干擾抑制現象。因此高濃度污染物會累積在建築物背面的空穴區內。由此可知,建築物的煙流下洗現象(Building downwash)對於模式在模擬污染物擴散及濃度累積方面有舉足輕重的影響。 本研究使用Schulman and Scire之建築物下洗計算方式,將下洗機制程式化加入GTx模式中,觀察其對模式之影響,並對照此參數模組加入前後對模擬結果的差異,探討其相關性,期使GTx模式的模擬有更加準確及合理的結果。本研究預計對於一座焚化爐及一座集塵灰煉鋼廠所排放之戴奧辛(dioxins)做相關之模式模擬。模擬的結果,建築物下洗現象對GTx模式的主要影響在增加排放源鄰近地區的地面污染物濃度。zh_TW
dc.description.abstractIt generally used air quality models, meteorology models and Gaussian Trajectory models such as Gaussian Trajectory transfer-coefficient modeling system (GTx) cooperating with the meteorological data to simulate the trajectory of the pollutants and meteorological phenomena in the neighborhood of the emission source while sampling. In addition, investigated the variations of the pollutants and their origins by drawing pollutant concentration illustrations and simulated trajectory illustrations. Furthermore, analyzed the effects to the neighbor area of the pollution source and the accumulated concentration. Many researches indicated that separated flows occured when airstreams of pollutants passed through buildings. Due to the separated flows, a cavity which interfered and restrained the plume dispersion formed in the lee of the building. Thereby, it lowered the plume height and tended to accumulate a great deal of pollutants in the cavity of the back of the building. Thus it can be seen, building downwash played an important role in modeling the dispersion and concentration of the pollutants. The aim of the study was to investigate the inplementation of building downwash effects for a Gaussian Trajectory model and compare the similarity and dissimilarity of the simulated results. This study was expected to proceed some simulations and analyses to several incinerators and steel-smelting furnaces. The result of the simulations showed that the main influence of the building downwash phenomenon in GTx was to increase the ground-level concentration of pollutants in the neighborhood of the emission source.en_US
dc.description.tableofcontents表目錄 ----------------------------------------------------------------------Ⅰ-1 圖目錄 ---------------------------------------------------------------------Ⅱ-1 第一章 前 言----------------------------------------------------------- 1-1 1.1 研究緣起------------------------------------------------------- 1-1 1.2 研究目的及方法---------------------------------------------- 1-2 1.3 研究預期成果------------------------------------------------- 1-3 第二章 文獻回顧------------------------------------------------------ 2-1 2.1 空氣品質模式之發展---------------------------------------- 2-1 2.2 軌跡模擬原理及應用---------------------------------------- 2-3 2.3 數值模式類型------------------------------------------------- 2-4 2.4 高斯擴散模式------------------------------------------------- 2-6 2.5 軌跡模式之發展與現況------------------------------------- 2-8 2.6 建築物下洗模式---------------------------------------------- 2-10 2.7 戴奧辛於煙道氣中之氣固相分布------------------------- 2-12 第三章 模式的發展與理論------------------------------------------ 3-1 3.1 順規跡模式---------------------------------------------------- 3-1 3.2 逆規跡模式----------------------------------------------- 3-3 3.2.1 模擬相關機制--------------------------------------- 3-3 3.3 高斯煙流理論------------------------------------------- 3-5 3.3.1 質量殘留比例項------------------------------------ 3-6 3.3.2 化學衰退殘留項------------------------------------------ 3-8 3.3.3 濕沉降殘留項--------------------------------------------- 3-8 3.3.4 乾沉降殘留項--------------------------------------------- 3-9 3.3.5 擴散係數--------------------------------------------------- 3-10 3.4 煙流上升作用------------------------------------------------- 3-13 3.4.1 高空風速的修正------------------------------------------ 3-13 3.4.2 煙囪項的下洗作用--------------------------------------- 3-15 3.4.3 煙流上升機制--------------------------------------------- 3-15 3.5 模式應用------------------------------------------------------- 3-23 3.6 建築物煙流下洗作用---------------------------------------- 3-28 3.6.1 煙流上升高度--------------------------------------------- 3-28 3.6.2 修正擴散係數--------------------------------------------- 3-32 3.6.3 OML半經驗法------------------------------------------- 3-37 第四章 研究方法------------------------------------------------------ 4-1 4.1 模式模擬執行流程------------------------------------------- 4-1 4.2 軌跡資料的前處理------------------------------------------- 4-9 4.3 污染源相關資料---------------------------------------------- 4-13 第五章 結果與討論--------------------------------------------------- 5-1 5.1 建築物下洗模組分析---------------------------------------- 5-1 5.2 案例研究------------------------------------------------------- 5-3 5.2.1 順軌跡案例研究(一)台北內湖焚化廠---------------- 5-5 5.2.2 順軌跡案例研究(二)彰化縣台灣鋼聯公司---------- 5-19 5.2.2.1 2005年3月2日~3月5日案例------------------- 5-19 5.2.2.2 2005年4月6日~4月8日案例------------------- 5-34 5.3 逆軌跡案例研究---------------------------------------------- 5-49 5.3.1 全台點源排放量對受體點濃度模擬------------------ 5-49 5.3.2 彰化縣戴奧辛點源排放量對受體點濃度模擬 5-55 5.4模式應用-點源排放量對受體點濃度模擬---------------- 5-72 5.4 模式應用-乾沉降影響探討--------------------------------- 5-80 第六章 結論與建議--------------------------------------------------- 6-1 參考文獻------------------------------------------------------------------ V-1 附錄A 軌跡模式模擬流程圖--------------------------------------- A-1 附錄B 彰化縣境內戴奧辛主要排放源資料及檢測資料------ A-8zh_TW
dc.language.isoen_USzh_TW
dc.publisher環境工程學系zh_TW
dc.subjectGTxen_US
dc.subject高斯煙流軌跡模式zh_TW
dc.subjectBuilding downwashen_US
dc.subjectcavityen_US
dc.subject煙流下洗現象zh_TW
dc.subject空穴zh_TW
dc.title建築物下洗現象對高斯煙流軌跡模式於污染物模擬之影響探討zh_TW
dc.titleInplementation of building downwash effects for a Gaussian trajectory Modelen_US
dc.typeThesis and Dissertationzh_TW
item.fulltextno fulltext-
item.languageiso639-1en_US-
item.openairetypeThesis and Dissertation-
item.cerifentitytypePublications-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.grantfulltextnone-
Appears in Collections:環境工程學系所
Show simple item record
 
TAIR Related Article

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.