在今日能源使用要求上的節能、減排驅使下,車用柴油引擎燃料的發展,將不得不面臨著前所未有的考驗,已是必然之趨勢。過去曾廣泛利用水乳化柴油燃料,在柴油引擎的高溫燃燒下,讓其產生微爆的現象,用以減低柴油引擎廢氣排放中Smoke和NOx的濃度值,又近年來使用奈米氧化鋁粉末添加在車用柴油燃料中,則是用以提升柴油引擎的燃燒效率、增加引擎性能和減低廢氣排放。故本研究在高密度的乳化超級柴油中,添加不同比例的奈米氧化鋁粉末為實驗燃料,經實驗結果證明,在高密度的乳化超級柴油中,添加奈米氧化鋁粉末的比例越高,則其BSFC值以及Smoke、NOx、HC等的濃度值和EGT值也越低,而BMEP值也越高。另比較完全不添加奈米氧化鋁粉末的高密度乳化柴油時,則其BSFC值以及Smoke、NOx、HC等的濃度值和EGT值分別低約4.25%、11.72%、14.11%、21.64%和1.10%,而BMEP值高約1.79%。故由此證明,高密度乳化柴油中添加高比例的奈米氧化鋁粉末則對柴油引擎性能、燃料消耗率和廢氣排放的改善是有顯著效果的。
Today, diesel engine vehicles will have to face unprecedented challenges on energy saving, exhaust emission reduction and become an inevitable trend. Emulsified fuels were using in diesel engine can produce the phenomenon of micro-explosion to reduce Smoke and concentration of NOx emissions. In recent years, using nano alumina powder added in diesel vehicle fuel can improve the combustion efficiency of diesel engines, increase engine performance and reduce exhaust emissions. In this study, add different proportions of nano alumina powder into high density emulsion fuel. The experimental results show that add higher proportion of nano alumina powder can reduce BSFC value, Smoke emission, NOX emission, HC emission and EGT value, and produce higher BMEP value. Compare to the pure high density emulsion fuel, using nano alumina powder into high density emulsion fuel can reduce BSFC value 4.25%, Smoke emission decreased by 11.72%, NOX emission decreased by 14.11%, HC emission decreased by 21.64%, EGT value decreased by 1.10%. Thus, using nano alumina powder into high density emulsion fuel can significantly improve diesel engine performance, fuel consumption and exhaust emissions.