臺灣博碩士論文加值系統

本研究主要是使用不同比例之乙醇-汽油混合燃料（E0、E3、E6、E9），在不同負載下，探討能源效率以及廢氣排放。試利用內燃發電機、發電機負載系統、Electrical Low-Pressure Impactor (ELPI)、BE-1000A氣體分析儀、廢棄再循環系統等，建立排放採樣系統。以95鉛汽油、E3、E6、E9酒精汽油為燃料進行採樣，並以內燃機之熱效率表示能源效率。分析不同操作條件對於內燃發電機排放特徵及能源效率之影響。
研究結果顯示引擎排放微粒濃度隨著負載的增加而增加，而隨著酒精含量增加而降低。CO排放濃度減量效果最好的在使用E6酒精汽油時高負載減量87.42％。E3平均CO排放濃度減量42.47％，E6平均CO排放濃度減量85.59％，E9平均CO排放濃度減量82.92％。HC排放濃度減量效果最好的在使用E3酒精汽油時低負載減量98.62％。E3平均HC排放濃度減量78.70％，E6均HC排放濃度減量97.50％，E9平均HC排放濃度減量89.46％。NOx排放濃度減量效果最好的在使用E6與E9酒精汽油時無負載減量89.01％。E3平均NOx排放濃度減量35.10％，E6均NOx排放濃度減量85.58％，E9平均NOx排放濃度減量76.84％。由氣態污染物減量來看，E6酒精汽油的減量效果最好。內燃發電機引擎之熱效率，隨著酒精添加含量增加，熱效率增加；隨著負載增加，熱效率也增加。

This study is focused on fuel energy efficiency and pollution analysis of different ratios of ethanol-gasoline blended fuels (E0, E3, E6, E9) under different loadinds. In this thesis, the measurement system consisted of a Internal Combustion engine generator, generator loading system, Electrical Low-Pressure Impactor (ELPI), BE-1000A gas analyzer and exhaust gas recirculation system. Different fuels, 95 unleaded gasoline and different ratios of ethanol-gasoline blended fuels (E0, E3, E6, E9) were used to study their effects on the exhaust gas emission and expressed with thermal efficiency of the Internal Combustion engine generator energy efficiency.
The results suggested that particle number concentration increased as the loading of generator increased. However, it decreased as the ratio of ethanol-gasoline blended fuels increased. The result is the best which using E6 to reduce the CO emissions by 87.42% on high loading. The average of CO concentration reducing by using E3 is 42.47%, E6 is 85.59% and E9 is 82.92%.The result is the best which using E3 to reduce the HC emissions by 98.62% on low loading. The result is the best which using E3 and E9 to reduce the NOx emissions by 89.01% on no loading. The average of NOx concentration reducing by using E3 is 35.10%, E6 is 85.58% and E9 is 76.84%.To reducing exhaust gas,the result is the best by using E6. The thermal efficiency of Internal Combustion engine generator increased as the ratio of ethanol-gasoline blended fuels increased and decreased as the loading of generator increased.

摘要 i
ABSTRACT ii
誌 謝 iii
目 錄 iv
表 目 錄 vi
圖 目 錄 vii
第一章 緒論 1
1.1 研究背景 1
1.2 研究目的 4
第二章 文獻回顧 5
2.1 汽油引擎 5
2.1.1汽油引擎之運轉特性 5
2.1.2四行程循環引擎 5
2.1.3汽油引擎之排放污染物特徵 6
2.2 內燃發電機 8
2.2.1內燃發電機運作原理 8
2.2.2交流電頻率以60Hz為標準之緣由 10
2.3 酒精汽油之特性與研究緣由 11
2.3.1 酒精汽油 11
2.3.2 酒精汽油對引擎性能之影響 12
2.3.3 酒精汽油對廢氣排放之影響 13
第三章 研究方法與設備 15
3.1 研究架構與流程 15
3.2 實驗操作變因 17
3.3 實驗系統 19
3.4 微粒採樣系統 22
Electrical Low-Pressure Impactor 22
3.5 氣態污染物採樣系統 27
3.6 廢氣再循環系統 29
3.7 引擎性能測試 30
第四章 結果與討論 31
4.1 酒精汽油對排放微粒之影響 31
4.2 酒精汽油對排放氣態污染物之影響 34
4.2.1 酒精汽油對CO排放濃度之影響 34
4.2.2 酒精汽油對HC排放濃度之影響 37
4.2.3 酒精汽油對NOx排放濃度之影響 40
4.3 酒精汽油對能源效率之影響 43
4.4 廢氣再循環對引擎排放特性與引擎性能之影響 47
4.4.1 廢氣再循環對引擎排放微粒與氣態污染物之影響 47
4.4.2 廢氣再循環對引擎熱效率之影響 52
第五章 結論與建議 53
5.1 結論 53
5.2 建議 55
參考文獻 56

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