Investigation of the effect of hydrogen enrichment on the performance, emission, and combustion characteristics of a diesel engine

R. Vasanthakumar, M. Loganathan, S. Chockalingam, M. Vikneswaran, S. Venkatramanan
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Abstract

With an aim to partially replace conventional diesel fuel, this work investigated the impact of injecting hydrogen into an intake manifold of a diesel engine on its performance. Due to the benefits of hydrogen fuel, such as its high calorific value and flame velocity, it can be used in a dual-fuel mode of operation with diesel. The experiment was carried out for various engine loads with engine speed maintained constant at 1500. By using a digital volume flow metre, hydrogen was injected at three different volume flow rates, namely 3, 6, and 9 lpm. Engine combustion, emission, and performance parameters were evaluated for different hydrogen flow rates and compared to sole diesel. The result revealed that the brake thermal efficiency of the engine increased, whereas the brake-specific fuel consumption decreased due to hydrogen enrichment. The hydrocarbon and carbon monoxide emissions were lower in dual fuel mode when compared to sole diesel operation under all load situations. On the other hand, Oxides of Nitrogen (NOx) emission increased with hydrogen flow rate and resulted in higher NOx than diesel. Furthermore, hydrogen enrichment increased the values of the peak heat release rate and cylinder pressure by a significant margin from the corresponding values given by diesel fuel. Among the evaluated H2 flow rates, 9 lpm is found to be the best, demonstrating enhanced engine characteristics Due to the benefits of hydrogen fuel, such as its high calorific value and flame velocity, it can be used in a dual fuel mode of operation with diesel. The experiment was carried out for various engine loads with engine speed maintained constant at 1500. By using a digital volume flow metre, hydrogen was injected at three different volume flow rates, namely 3, 6, and 9 lpm. Engine combustion, emission, and performance parameters were evaluated for different hydrogen flow rates and compared to sole diesel. The result revealed that brake thermal efficiency of the engine increased, whereas the brake specific fuel consumption decreased due to hydrogen enrichment. The hydrocarbon and carbon monoxide emissions were lower in dual fuel mode when compared to sole diesel operation under all load situations. Among the evaluated H2 flow rates, 9 lpm is found to be the best, demonstrated enhanced engine characteristics.
富氢对柴油机性能、排放和燃烧特性影响的研究
为了部分替代传统柴油燃料,本工作研究了向柴油发动机进气歧管注入氢气对其性能的影响。由于氢燃料的优点,例如其高热值和火焰速度,它可以与柴油在双燃料模式下使用。在发动机转速恒定为1500的条件下,对不同的发动机负荷进行了试验。通过使用数字体积流量计,氢气以三种不同的体积流量注入,即3、6和9 lpm。发动机的燃烧、排放和性能参数在不同的氢气流速下进行了评估,并与单一柴油发动机进行了比较。结果表明,由于富氢,发动机的制动热效率提高,而制动油耗降低。在所有负荷情况下,双燃料模式下的碳氢化合物和一氧化碳排放量都低于单柴油模式。另一方面,随着氢气流量的增加,氮氧化物(NOx)排放量增加,导致NOx排放量高于柴油。此外,氢气的富集使峰值放热速率和气缸压力的值比柴油的相应值有显著的提高。在评估的H2流量中,9 lpm被认为是最好的,证明了增强的发动机特性。由于氢燃料的优点,如高热值和火焰速度,它可以与柴油一起使用双燃料模式。在发动机转速恒定为1500的条件下,对不同的发动机负荷进行了试验。通过使用数字体积流量计,氢气以三种不同的体积流量注入,即3、6和9 lpm。发动机的燃烧、排放和性能参数在不同的氢气流速下进行了评估,并与单一柴油发动机进行了比较。结果表明,由于富氢,发动机的制动热效率提高,而制动比油耗降低。在所有负荷情况下,双燃料模式下的碳氢化合物和一氧化碳排放量都低于单柴油模式。在评价的H2流量中,9 lpm是最好的,表现出发动机性能的增强。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Current Materials Science
Current Materials Science Materials Science-Materials Science (all)
CiteScore
0.80
自引率
0.00%
发文量
38
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