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  • 學位論文

不同乳化生質柴油中之高密度奈米Al2O3對柴油引擎性能之研究

The study on the performance of different emulsified biodiesel with high density Al2O3 nanoparticle using in diesel Engine

指導教授 : 林百福
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摘要


為了提升引擎性能及降低車輛排放汙染,生質柴油和水乳化燃料的研究日益被重視,但生質柴油的使用會使NOX排放上升,使用水乳化燃料則會使BSFC及HC排放上升。為了解決上述問題,遂有研究者利用奈米Al2O3的高熱傳率及高化學活性,添加於燃料中改善燃料的燃燒特性,提升燃料性能。故本研究使用3 %、5 %和8 %等三種不同水分比例的乳化生質柴油,以及在以上三種乳化生質柴油中添加150 ppm奈米Al2O3作為燃料添加劑,製成奈米Al2O3乳化生質柴油,使用於單缸柴油引擎進行實驗。實驗結果顯示,在乳化生質柴油中的水分比例愈高,可以降低引擎Smoke排放、NOX排放及EGT值,甚至提升最大BMEP值,不過對BSFC和HC排放值則會隨著水比例上升而升高。在本研究中也證實添加奈米Al2O3可以使BSFC和HC排放下降之外,其他引擎性能和廢氣排放也有所改善,因此將奈米Al2O3添加在乳化生質柴油以降低廢氣排放及BSFC,減低對環境的傷害。

並列摘要


In order to improve engine performance and reduce pollutant emissions from vehicles, the research of biodiesel and water-emulsified fuel has been taken seriously; however, using biodiesel would make nitrogen oxides (NOX) emission arise, and using water-emulsified fuel would increase brake specific fuel consumption(BSFC) and hydrocarbon(HC) emissions. To solve the problems above, some researchers take advantage of nano-Al2O3 itself has high thermal conductivity and chemical activity, adding nano-Al2O3 in fuel attempt to improve combustion characteristic and fuel characteristic. Hence, three difference percentage of water (3 %, 5 % and 8 %) on volume basis were emulsified with biodiesel proportionality. In addition, 150ppm of Nano-Al2O3 blended with emulsified fuel to produce Nano-Al2O3 emulsified fuel, and do engine performance test and emission test in a single cylinder diesel engine. The results indicate that the smoke, NOX emission and exhaust gas temperature (EGT) decrease as the water percentage in the emulsion increases, but HC emission and BSFC increase as the water concentration increases. Moreover, the study not only prove that nano-Al2O3 additive emulsified biodiesel has reduces HC emission and BSFC but also has improvement on performance and NOX and smoke emission. Therefore, nano-Al2O3 additive in emulsified biodiesel is able to reduces exhaust emission, BSFC, and damage of environment.

參考文獻


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