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研究生:林育生
研究生(外文):Yu-Sheng Lin
論文名稱:內氣循環與外氣模式對車廂內二氧化碳與懸浮微粒濃度之影響研究
論文名稱(外文):Investigation of effects of recirculation / outdoor air modes on concentrations of CO2 and particulate matter in the cabin
指導教授:張烔堡
指導教授(外文):Chang,Tong-Bou
學位類別:碩士
校院名稱:國立嘉義大學
系所名稱:機械與能源工程學系
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2020
畢業學年度:108
語文別:中文
論文頁數:62
中文關鍵詞:車廂二氧化碳換氣策略空氣清淨機懸浮微粒
外文關鍵詞:cabincarbon dioxideventilation strategyair purifierparticulate matters
相關次數:
  • 被引用被引用:1
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  • 下載下載:26
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車廂內二氧化碳濃度高所引起的頭暈、嗜睡等症狀是造成車禍的原因之一,改善此問題的方法就是使車內外的空氣進行對流,但車外汙染源多,換氣易造成人吸入髒污的空氣;不進行換氣則車內二氧化碳濃度會飆升快速,導致行車安全疑慮,是否要進行換氣便是一個重要的問題。本研究提供了一種汽車空調換氣策略,找出換氣時間與時長使二氧化碳濃度抑制在一定範圍內是本研究探討的重點,本研究選擇車上乘客為1人、2人及5人的情況與市售濾網的過濾效率範圍中的0.2、0.4及0.8進行CFD電腦模擬,將二氧化碳濃度控制在1000 ppm至2000 ppm之間,找出不同人數、不同的過濾效率所需安全換氣時長與時間點,經模擬結果顯示,1人乘車時建議每20至30分鐘可以開啟1分鐘的外氣模式,2人乘車時建議每10至15分鐘可以開啟1分鐘的外氣模式,5人乘車時則建議長開外氣循環。最後在車廂內不同位置裝設空氣清淨機模擬,比較在哪個位置裝設空氣清淨機能最有效的減少車廂內汙染粒子,結果顯示在車中裝設空氣清淨機確實能有效降低汙染粒子的個數,其中裝設在中央扶手位置的幫助最為顯著。本研究讓車廂內的二氧化碳濃度與懸浮微粒在可接受的範圍中,讓駕駛人在行駛過程保持良好的狀態以維持自身行車安全。
Dizziness, drowsiness and other symptoms caused by high carbon dioxide concentration in the vehicle are one of the causes of car accidents. The way to improve the problem is to convect the air inside and outside the vehicle. However, there are many sources of pollution outside the vehicle. Ventilation will cause people to inhale dirty air. Without ventilating, the carbon dioxide concentration in the car will raise rapidly, leading to driving safety doubts. Whether to ventilate or not is an important question. For driving safety, it is necessary to choose ventilation. This study provides a strategy for vehicle air conditioning ventilation. Finding the ventilation time and duration to keep the carbon dioxide concentration within a certain range is the focus of this study. In this study, CFD simulations were run to select the passengers in the vehicle for 1, 2, and 5 people, and 0.2, 0.4, and 0.8 of the filter efficiency range in commercially available filters. Controlling the concentration of carbon dioxide between 1000 ppm and 2000 ppm to find out the duration and time of safe ventilation required for different passengers in the vehicle and different filtration efficiencies. The simulation results show that it is recommended that it can use 100% recirculation every 20 to 30 minutes when only 1 passenger in the vehicle. It is recommended that it can use 100% recirculation every 10 to 15 minutes when 2 passengers in the vehicle. It is recommended that it can keep to use 100% recirculation when 5 passengers in the vehicle. Finally, simulate the installation of air purifiers in different positions in the vehicle. Compare with which position to reduce the particulate matters in the cabin most effectively. The results show that installing an air purifier in the cabin can effectively reduce the number of particulate matters, and the effect of the one setting at the central armrest is the most significant. In this study, the carbon dioxide concentration and particulate matters in the cabin are within an acceptable range. Let the driver keep a good state during driving to protect his own driving safety.
摘要 I
Abstract II
誌謝 IV
目次 V
圖次 VII
表次 IX
符號彙編 X
第一章 緒論 1
1.1、 研究動機與目的 1
1.2、 文獻回顧 2
1.3、 研究目標 4
1.4、 論文架構 4
第二章 基本原理與理論分析 6
2.1、 室內空氣品質 6
2.2、 汙染物種類 10
2.3、 汽車換氣模式(內循環模式與外循環模式) 12
2.4、 濾網材料分析 14
2.5、 潔淨空氣輸送率(CADR值)與空氣清淨機累積淨化量(CCM值) 18
第三章 研究方法 21
3.1、 模擬流程介紹 21
3.2、 模型介紹 23
3.3、 理論方程式 26
3.4、 邊界條件設定 28
3.5、 車用空氣清淨機介紹 30
第四章 結果與討論 32
4.1、 格點測試 32
4.2、 模擬結果與論文實測結果比較與分析 33
4.3、 使用不同乘客數與不同濾網過濾效率之模擬結果 35
4.3.1 乘客數相同 濾網過濾效率不同 39
4.3.2 乘客數不同 濾網過濾效率相同 45
4.4、 不同的空氣清淨機擺放位置 49
第五章 結論 53
5.1、 結論 53
5.2、 未來展望 54
參考文獻 55
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