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首页> 外文期刊>Journal of Energy Engineering >Comparative Evaluation of Ethanol, n-Butanol, and Diethyl Ether Effects as Biofuel Supplements on Combustion Characteristics, Cyclic Variations, and Emissions Balance in Light-Duty Diesel Engine
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Comparative Evaluation of Ethanol, n-Butanol, and Diethyl Ether Effects as Biofuel Supplements on Combustion Characteristics, Cyclic Variations, and Emissions Balance in Light-Duty Diesel Engine

机译：乙醇，正丁醇和二乙醚作为生物燃料补充剂对轻型柴油机燃烧特性，循环变化和排放平衡的影响的比较评估

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This work evaluates experimentally on a comparative basis the effects of using three customary biofuels on the cyclic variability (irregularity) of combustion and emissions balance in a single-cylinder, light-duty, direct-injection diesel engine run at three loads. Blends of fossil diesel with up to 15% (by volume) ethanol and 24% n-butanol or diethyl ether (DEE) are investigated. Related experimental study including heat release diagrams reported by the authors for these blends in the same engine disclosed the differentiation in performance and emissions of these biofuel blends from running the engine with neat fossil diesel. Given that low ignition quality fuels, as the present biofuels, mainly at high blending ratios may give rise to unstable engine functioning and hence detrimental performance, this work examines on a comparative basis the strength of combustion cycle-to-cycle variations as revealed in the measured cylinder pressure diagrams. The latter are analyzed with respect to maximum pressures, maximum rates of pressure rise, mean effective pressures (indicated), and ignition delays, by using statistical tools for mean values and coefficients of variation. Apart from the examination and interpretation of the engine stability results, this study also explores the balance of all four regulated exhaust emissions, namely the defeat of the smoke-nitrogen oxides trade-off and the interesting carbon monoxide-unburned hydrocarbons adverse coupling (trade-off) realized when alcohols or diethyl ether are used in the blends. (C) 2016 American Society of Civil Engineers.
机译：这项工作在比较的基础上通过实验评估了使用三种常规生物燃料对单缸，轻型，直喷式柴油发动机在三种负载下运行时燃烧循环变化（不规则性）和排放平衡的影响。研究了化石柴油与15％（按体积计）乙醇和24％正丁醇或乙醚（DEE）的混合物。相关实验研究包括作者报告的同一发动机内这些混合物的放热图，揭示了这些生物燃料混合物在使用纯净的化石柴油运行时在性能和排放方面的差异。鉴于低点火质量的燃料（作为当前的生物燃料，主要是在高混合比下）可能会导致发动机功能不稳定，从而损害性能，这项工作在比较的基础上研究了燃烧循环之间变化的强度。实测气缸压力图。通过使用平均值和变异系数的统计工具，就最大压力，最大压力上升率，平均有效压力（指示）和点火延迟进行了分析。除了检查和解释发动机稳定性结果外，本研究还探索了所有四种调节的废气排放之间的平衡，即消除了烟气中的氮氧化物权衡和令人感兴趣的一氧化碳-未燃烧碳氢化合物的不利耦合（贸易-当在混合物中使用酒精或乙醚时。 （C）2016年美国土木工程师学会。

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