Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/91298
標題: Investigation on the relationship among particulate matter concentration, opacity and smoke number of diesel engine
柴油引擎懸浮微粒濃度、不透光率和汙染度的相關性探討
作者: 黃健寧
Chien-Ning Huang
關鍵字: Dilution channel
EGR
PM
Diesel engine
Opacity
Smoke number
稀釋道
廢氣再循環
懸浮微粒
柴油引擎
不透光率
汙染度
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摘要: Pollutions from diesel engines are globally awared currently. The World Health Organization (WHO) has officially classified diesel engine emissions as one carcinogen. Many countries have promoted more stringent emission regulations on diesel vehicle in order to protect public health. Particulate matter will be generated when the diesel engine incomplete combustion. PM2.5 will lead to respiratory disease. Found the relationship among of particulate matter concentration, opacity and smoke number of diesel engine can simplify emission testing program. ST-100, MA-200A and dilution channel used in this study. The smoke number changed by different engine speed, loading and exhaust gas recirculation. Investigation on the relationship among of particulate matter concentration, opacity and smoke number of diesel engine,and set up the formula for translation. The humidity level, human error and sampling time have an influence on particulate matter. Use the opacity translation another value is not accurate. The smoke number will be higher when the EGR system is used. For smoke number about 50%,the relationship formula is not reliable for translation value.
近期柴油車汙染排放問題越來越受到關注,尤其是在 2012 年六 月十二日世界衛生組織 (WHO) 正式把柴油引擎廢氣歸列為致癌物 後,世界各國為保障民眾的健康紛紛的推動制定更嚴格的標準,柴油 引擎氣缸內燃燒不完全會產生碳微粒,其中粒徑 2.5μm 以下的碳微 粒即所謂的 PM2.5,易導致人體呼吸道病變。未來 104 年將改為不透 光率做為測試方式,因此若能將粒狀汙染物、不透光率以及汙染度之 間建立相關性,將可簡化柴油車的程序,方便判斷測試引擎是否符合 汙染排放的法規。 本研究以 ST-100 煙度計、MA-200A 光學式煙度計以及稀釋道對 汙染度、不透光率以及微粒質量濃度進行量測,並使用 Hino W06E 一期排放標準之引擎在動力計測試檯架上,藉由改變轉速及負載以及 加入 EGR 系統來控制煙度變化,探討微粒濃度、不透光率以及汙染 度之間的相關性 並建立換算式 可在適用條件下來換算其它量測值,,。 在微粒質量濃度的量測上,量測結果容易受人為及濕度等因素的 影響,PM2.5 的採樣結果較為準確,此外,採樣時間對於量測結果也 有影響。使用不透光率進行換算時,不透光率的變動幅度較大,換算 值僅能作於參考。高煙度是由 EGR 系統來產生的,在高煙度狀態時 量測值與換算值偏差會越來越高,因此在換算式的使用條件上,高煙 度的時候較不適合使用。
URI: http://hdl.handle.net/11455/91298
文章公開時間: 2018-07-16
Appears in Collections:機械工程學系所

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