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A Study on the Performance and Emission Characteristics of a Diesel Engine Operated with Ternary Higher Alcohol Biofuel Blends
Un estudio sobre las características de rendimiento y emisión de un motor diésel operado con mezclas ternarias de biocombustible de alcohol superior
DOI:
https://doi.org/10.15446/ing.investig.93696Keywords:
diesel engine, higher alcohol biofuel, performance, emissions (en)motor diésel, biocombustible con alto contenido de alcohol, rendimiento, emisiones (es)
This study focused experimentally on the evaluation of a higher alcohol biofuel utilization with diesel fuel in a compression ignition engine. To this effect, two different ternary higher alcohol biofuel blends with different percentages by volume were used, i.e., DA5 (85% diesel + 5% butanol +5% pentanol + 5% hexanol) and DA10 (70% diesel + 10% butanol + 10% pentanol + 10% hexanol). The performance and emission results were compared against reference standard diesel fuel. Experiments revealed the brake power (BP) values of the engine to be reduced due to the lower calorific value of the alcohols. In addition, this phenomenon led to increased levels of brake-specific fuel consumption (BSFC), which resulted in a higher fuel consumption to obtain unit power. Regarding emissions, carbon monoxide (CO) was reduced as a result of the additional oxygen content of alcohols, which triggered the more oxidized CO with oxygen. The results regarding unwanted nitrogen oxides (NOx) emissions were also attractive according to the alcohol utilized. Considerable reductions were obtained with alcohol mixtures when compared to diesel fuel, which can be explained by the reduced combustion temperatures in the cylinder, given the higher latent heat in the evaporation of alcohols.
Este estudio se centró experimentalmente en la evaluación de una mayor utilización de biocombustible de alcohol con combustible diésel en un motor de encendido por compresión. Para ello, se utilizaron dos mezclas ternarias de biocombustible de alcohol superior distintas y con diferentes porcentajes en volumen DA5 (85 % diésel + 5 % butanol + 5 % pentanol + 5 % hexanol) y DA10 (70 % diésel + 10 % butanol + 10 % pentanol + 10 % hexanol). Los resultados de rendimiento y emisiones se compararon con combustible diésel estándar de referencia. Los experimentos revelaron que los valores de la potencia de frenado (BP) del motor se redujeron debido al menor poder calorífico de los alcoholes. Además, este fenómeno llevó a obtener mayores niveles de consumo de combustible específico de frenado (BSFC), lo que resultó en un mayor consumo de combustible para obtener potencia unitaria. Con respecto a las emisiones, el monóxido de carbono (CO) se redujo como resultado del contenido de oxígeno adicional de los alcoholes, lo cual activó el CO más oxidado con oxígeno. Los resultados de la emisión no deseada de óxidos de nitrógeno (NOx) también fueron atractivos según el alcohol utilizado. Se obtuvieron reducciones considerables con las mezclas de alcoholes en comparación con el combustible diésel, lo que puede deberse a temperaturas de combustión reducidas en el cilindro, dado el mayor calor latente en la evaporación de alcoholes.
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