Effect of Hydrogen Fumigation in a Dual Fueled Heavy Duty Engine
Effect of Hydrogen Fumigation in a Dual Fueled Heavy Duty Engine
复制标题
氢熏蒸对双燃料重型发动机的影响
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
M. Heikal
中科院分区：
文献类型：
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作者：
R. Morgan;P. Atkins;A. Atkins;Christopher Lenartowicz;M. Heikal
由于担心道路运输排放对气候的影响，人们越来越关注如何减少该行业的二氧化碳排放。这在商用车领域尤其值得关注，因为由于车辆的占空比，发动机小型化和电气化的好处有限。在本文中，我们给出了一个实验程序的结果，以研究重型发动机双燃料对氢和柴油的影响。氢是一种潜在的零碳燃料，如果由可再生能源制造，但也可以通过部分液体燃料的蒸汽重整在车辆上制造。这为通过吸热蒸汽重整工艺回收排气系统余热开辟了一条新的途径，提高了系统的整体效率。为了使这些概念可行，双燃料燃烧系统必须既热效率高，又不会增加氮氧化物等有毒物质的排放。该测试项目研究了在有废气再循环（EGR）和没有废气再循环（EGR）的情况下向发动机进气系统喷射氢气的影响。基准发动机经过校准，通过各种后处理策略达到欧VI氮氧化物排放。研究了增加氢气量取代柴油的影响。结果与本文提出的氢柴油燃烧过程的概念模型进行了比较。
Concerns over the impact of road transport emissions on the climate have led to increased focus on how CO2 emissions could be reduced from the sector. This is of particular concern in the commercial vehicle sector, where engine downsizing and electrification have limited benefit due to the vehicle duty cycle. In this paper, we present results from an experimental program to investigate the impact of dual fueling a heavy duty engine on hydrogen and diesel. Hydrogen is potentially a zero carbon fuel, if manufactured from renewable energy but could also be manufactured on the vehicle through steam reformation of part of the liquid fuel. This opens a novel pathway for the recovery of waste heat from the exhaust system through the endothermic steam reformation process, improving the overall system efficiency. For these concepts to be viable, it is essential the dual fueled combustion system is both thermally efficient, and does not increase toxic emissions such as NOx. The test program reported studied the impact of hydrogen injection into the engine intake system with and without Exhaust Gas Recirculation (EGR). The baseline engine was calibrated to achieve Euro VI NOx emissions with various aftertreatment strategies. The impact of displacing diesel with increased quantities of hydrogen was studied. The results are compared with a conceptual model of the hydrogen – diesel combustion process presented in the paper.