全球暖化意識的抬頭,石化能源的需求卻與日俱增,石化燃料燃燒後排放大量廢氣污染物以及造成溫室效應,對人體健康與氣候的變遷是影響甚鉅的,故降低排放汙染的思維下,新能源的開發和新技術的研發是勢在必行的。而本研究所使用的是利用在3%的水乳化柴油中,將奈米級氧化鋁粉以50 ppm、100 ppm與150 ppm添加於工作流體中,利用奈米氧化鋁粉流體在燃燒過程中,受布朗運動影響,奈米粒子碰撞增加熱傳特性,提高燃燒效率,降低廢氣排放量,又因水乳化柴油在高溫下,使得奈米級油包水乳化燃燒的微爆現象產生二次霧化,與空氣充分混合進而達到完全燃燒特性,也可大幅降低空氣污染。實驗結果無論在BSFC、Smoke濃度值、HC濃度值、NOx濃度值和EGT值均較不加任何奈米鋁粉的水乳化柴油低,故由實驗證明,在水乳化柴油中添加適當比例的奈米氧化鋁粉對柴油引擎廢氣的排放減低有顯著的效果。
The rise of global warming awareness, fossil energy demand is growing, a lot of fossil fuel combustion emissions of pollutants and greenhouse emissions on human health and the impact of climate change is very huge, and therefore reduce emissions pollution of thinking, a new energy development and new technology research and development is imperative. And used in this study is the use of 3 % water emulsion diesel fuel, the nano Al2o3 powder to 50 ppm, 100 ppm and 150 ppm in the working fluid is added, the use of nano-alumina powder in the fluid in the combustion process, by Brownian motion effects, Nano-particle collisions increase the heat transfer characteristics, improve combustion efficiency and reduce emissions, because water emulsified diesel oil at high temperatures, making Nanoscale oil emulsion combustion microburst phenomenon secondary atomization, and air mixing and thus achieve complete combustion characteristics, but also can significantly reduce air pollution. The results in terms of BSFC, Smoke concentration values, HC concentration, NOx concentration value and EGT values than those without any Nano-aluminum water emulsified diesel is low, so the experiment proved that the water emulsified diesel adding an appropriate proportion of nano Al2o3 powder on reducing diesel engine emissions have a significant effect.