本研究主要目的為模擬報廢汽車拆解廠作業區域環境中多環芳香烴化合物逸散之特徵。
選擇一所在南台灣地區之汽車拆解廠裡，實測二十一種多環芳香烴化合物採樣數據，使用排送風扇設置數量區分為四種模式，並進行軟體模擬。
採用現行業界常見流體力學模擬軟體FLUENT中有限體積法的離散控制方程式，針對拆解廠的背景環境與採樣數據進行模擬。
結果顯示低分子量濃度降低結果皆大於中高分子量濃度，可推估與多環芳香烴化合物蒸氣壓和分子量有關，分子量越小和蒸氣壓越大改善效果越好，各分子量濃度在兩個風扇下至少40%的濃度下降，本研究模擬結果，可提供拆車廠作業環境多環芳香烴化合物(PAHs)汙染物經排風移除及改善之參考。

The main purpose of this study is to simulate the characteristics of polycyclic aromatic hydrocarbon compounds (PAHs) in the discarded vehicle dismantling plants.
This study choose an automobile dismantling plant in southern Taiwan to execute this software simulation where we tested a total of twenty one polycyclic aromatic hydrocarbon compounds (PAHs) according to four models classified by the amount of evacuation fans.
This study choose the Discrete control equations of the Finite volume method from Fluid mechanics simulation software, FLUENT, which is commonly used by current industry to simulate the environment and sample data of the dismantling plant.
The results showed that the results of low molecular weight concentration reduction were all higher than the medium and high molecular weight concentration. Besides, it could be deduced about the Vapor pressure and molecular weight of polycyclic aromatic hydrocarbon compounds (PAHs).
The improved effectiveness of smaller the molecular weight and the higher of the steam pressure were better. The concentration of each molecular weight in the two fans at least 40% of the concentration dropped. This simulation result can provide an improvement reference of the removal of PAHs for automobile dismantling plant under its operating environment .

摘要 II
ABSTRACT III
誌　謝 V
目錄 VI
表目錄 IX
圖目錄 XI
第一章前言 1
1.1研究緣起 1
1.2研究目的 2
第二章文獻回顧 3
2.1通風及溫度條件 3
2.1.1 台灣通風條件 3
2.1.2台灣溫度條件 4
2.2職業工作場所通風要求 5
2.3多環芳香烴PAHs介紹 10
2.3.1 PAHs之形成與來源 10
2.3.2 PAHs之物化特性 11
2.4汽車拆解廠介紹 13
2.4.1廢棄車輛拆解廠拆解處理程序 14
2.4.2拆卸引擎 14
2.4.3回收車殼 14
2.4.4廢棄車輛粉碎分類廠處理程序 14
2.5計算流體力學介紹 15
2.5.1有限體積法介紹 15
2.5.2離散化介紹 16
2.5.3耦合方式介紹 17
2.6統御方程式 18
第三章 研究方法與進行步驟 20
3.1研究工具 20
3.1.1 ANSYS DESIGN MODELER軟體介紹 20
3.1.2 ANSYS MESH軟體介紹 21
3.1.3 ANSYS FLUENT軟體介紹 22
3.2研究方法 24
3.2.1拆車廠空間尺寸測量 25
3.3數值模擬方法 27
3.3.1 DESIGN MODELER模型建立 27
3.3.2 MESH建立網格 27
3.3.3 FLUENT數值分析 28
第四章結果與討論 33
4.1模擬參數之設定 33
4.1.1拆車廠邊界條件設定 33
4.1.2拆車廠PAHs設定 34
4.1.3排送風扇設定 36
4.2較佳疊代次數之探討 38
4.3不同排送風扇數量溫度分布之探討 39
4.4低分子量不同環數PAHs模擬結果 42
4.4.1低分子量二環 43
4.4.2低分子量三環 51
4.5中分子量不同環數PAHs模擬結果 57
4.5.1中分子量四環 57
4.5.2中分子量五環 63
4.6高分子量不同環數PAHs模擬結果 69
4.6.1高分子量六環 69
4.6.2高分子量七環 75
第五章結論 82
參考文獻 83
作者簡介 88

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