Combustion characteristics and NOX emissions of biogas fuels with various CO2 contents in a micro co-generation spark-ignition engine
Combustion characteristics and NOX emissions of biogas fuels with various CO2 contents in a micro co-generation spark-ignition engine
复制标题
不同CO2含量沼气燃料在微型热电联产火花点火发动机中的燃烧特性及NOX排放
DOI：
10.1016/j.apenergy.2016.08.152
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发表时间：
2016
期刊：
影响因子：
11.2
通讯作者：
Eiji Tomita
中科院分区：
文献类型：
--
作者：
Yungjin Kim;Nobuyuki Kawahara;Kazuya Tsuboi;Eiji Tomita
沼气是一种可再生的内燃机替代燃料，与传统燃料相比有几个优点，包括成本更低，有害排放水平更低。特别是，它表现出二氧化碳(CO2)的中性再循环循环，而二氧化碳是全球变暖的主要原因之一。在这项研究中，我们使用微型热电联产发动机系统对不同组成的沼气燃料进行了研究。改变甲烷和二氧化碳的比例和发动机负荷，控制进气和燃料的流量来改变当量比。结果表明，在发动机负荷一定的情况下，随着CO2含量的增加，着火延迟期和燃烧周期延长，燃烧速度降低。随着CO2含量的增加，燃料消耗略有增加；然而，采用稀薄燃烧策略可以提高热效率，从而降低氮氧化物(NOX)排放，此外，使用具有化学计量空燃比的沼气在减少NOX排放方面是有效的，并且可以在较高负荷下改善燃油经济性。
Biogas is a renewable alternative fuel for internal combustion engines that has several advantages over conventional fuels, including lower costs and reduced levels of harmful emissions. In particular, it exhibits a neutral recirculation loop for carbon dioxide (CO2), which is one of the main causes of global warming. In this study, we investigated biogas fuels with various compositions using a micro co-generation engine system. The ratio of methane to CO2and engine load were varied, and the intake air and fuel flow rates were controlled to change the equivalence ratio. The results show that for a given engine load, the ignition delay and combustion period increased with CO2content, and the combustion speed decreased. The fuel consumption increased slightly with CO2content; however, the thermal efficiency improved using a lean burn strategy, resulting in lower nitrogen oxide (NOX) emission, and moreover, the use of biogas with the stoichiometric air–fuel ratio appears effective in reducing NOXemissions and can improve the fuel economy at higher loads.