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標題: 含水丁醇對柴油引擎性能與污染減量評估
Engine Performance And Emission Reduction For Diesel Engine Running With Butanol/Diesel Blends
作者: 亞拉
IRIA, Oumarou
關鍵字: 柴油引擎;Diesel engine;燃油消耗率;氮氧化物;微碳粒子;黑煙;正丁醇;異丁醇;BSFC;NOx;PM;Smoke Opacity;n-Butanol.
出版社: 機械工程學系所
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Pollutants emission reduction of internal combustion engines requires the use of innovative approaches, including alternative and renewable fuel technologies. Butanol contains oxygen molecules. It can be defined as renewable, sustainable and alternative fuel for internal combustion engines especially Diesel engines. Nitrogen oxide and smoke are crucial components emitted by the diesel engines. Previous studies have shown that using alcohol blends such as methanol and ethanol may reduce HC, PM, CO, NOx. The decrease in NOx is possible for its low peak cylinder temperature compared to pure diesel because alcohol has lower heating value. In our study, the effect of butanol on engine power, BSFC, BTE, fuel consumption and pollutants emissions and the corresponding effect factors are surveyed and analyzed in detail. The aim of this paper was to establish comparison in engine performance and evaluate the pollutants emission reduction such as NOx and smoke opacity for a direct injection diesel engine running with blends of n-butanol to diesel. A blend of n-Butanol with regular diesel fuel at the ratios of 10% and 20% was used as fuel to run the diesel engine in this study. A four stroke, Inline six cylinders direct injection diesel engine was used in this study. Dynamometer engine testing was conducted at four running conditions that correspond to the mode 1, mode 2, mode 7, and mode 11 of the EU 13 mode testing protocol. Exhaust pollutants emission were analyzed. These results showed clearly that the rate of emission of NOx decreases when blend of butanol is used, in comparison with the use of diesel fuel, also with increasing of n-butanol ratio in the fuel blend. Opacity is reduced substantially up to 43% at full-load with butanol up to 20% in the blending, probably due to the oxygen molecules containing in the n-butanol. Oxygen molecules content can improve the combustion quality and make it more complete. Nitrogen oxide was reduced by 22% at full load condition when n-butanol blend was used, due to the lower heating value of butanol; it is known that higher NOx emissions are closely related to the higher combustion flame temperature. The black smoke was reduced even more at all the conditions tested in this study. The exhaust gas pollutants emissions were sorely influenced by the n-butanol content of the blend.
其他識別: U0005-1007201316040100
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