Effects of natural gas, ethanol, and methanol enrichment on the performance of in-cylinder thermochemical fuel reforming (TFR) spark-ignition natural gas engine
Effects of natural gas, ethanol, and methanol enrichment on the performance of in-cylinder thermochemical fuel reforming (TFR) spark-ignition natural gas engine
复制标题
天然气、乙醇和甲醇浓缩对缸内热化学燃料重整（TFR）火花点火天然气发动机性能的影响
DOI：
10.1016/j.applthermaleng.2019.113913
复制
发表时间：
2019
影响因子：
6.4
通讯作者：
Zhu Lei
中科院分区：
文献类型：
--
作者：
Shao Yu;Sun Qian;Li Ang;He Zhuoyao;Xu Zhen;Qian Yong;Lu Xingcai;Huang Zhen;Zhu Lei
缸内热化学燃料重整（TFR）过程涉及以富当量比运行一个气缸，产生氢气和一氧化碳，并全部由进气歧管再吸入。 TFR 模式可以优化热效率和排放。然而，以天然气作为单一浓缩燃料时，仍存在重整缸与普通缸的指示平均有效压力(IMEP)差异、燃烧不稳定等局限性。为了克服这些问题并进一步提高发动机性能，应该找到一种更合适的浓缩燃料来代替天然气来帮助重整过程。本文研究了甲烷、甲醇和乙醇对重整缸的富集。结果表明，甲醇不仅保持了热效率，进一步降低了发动机排放，而且提供了最好的发动机性能稳定性，其次是乙醇和甲烷。此外，采用甲醇浓缩功能的发动机可以在重整缸内较宽的浓当量比下保持稳定运行。
In-cylinder thermochemical fuel reforming (TFR) process, which involves running one cylinder with a rich equivalent ratio, generates hydrogen and carbon monoxide to be all rebreathed by the intake manifold. Both the thermal efficiency and the emissions can be optimized by the TFR mode. However, when natural gas is used as the single enrichment fuel, there are still some limitations such as the indicated mean effective pressure (IMEP) discrepancy between the reforming cylinder and normal cylinders, combustion instability. To overcome these and further improve the engine performance, a more suitable enrichment fuel, instead of natural gas, should be identified to help the reforming process. In this paper, methane, methanol, and ethanol are studied to enrich the reforming cylinder. The results show that methanol not only maintains the thermal efficiency and further reduces the engine-out emissions, but also provides the best engine performance stabilization, followed by ethanol and methane. In addition, engines functioning with methanol enrichment can maintain stable operation on a wide range of rich equivalent ratios in the reforming cylinder.