Development and Experiments of Plasma High Temperature Oxygen-free Fuel Reformer
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摘要: 设计开发了新型的高温无氧燃料重整装置及试验系统，该高温无氧重整利用发动机废气加热及等离子辅助加热的方式来实现，装置结构设计简单紧凑且无须催化剂的介入。等离子加热易于控制、传热面积小易于保温绝热，可减少能量损失。将正庚烷的重整产物引入发动机中成功实现了RM-HCCI（Reformed molecule homogeneous charge compression ignition，RM-HCCI）燃烧，将RM-HCCI和汽油均质压燃（Gasoline HCCI，G-HCCI）燃烧进行对比研究。研究表明，重整后的小分子燃料可延迟着火，传热损失率和排气损失率更低，可以获得更高的指示热效率。Abstract: A new high-temperature oxygen-free fuel reformer and testing system was designed and developed. The fuel reforming under high temperature and oxygen-free condition was realized by means of the engine exhaust gas heating and plasma heating assistance. The structure design of high temperature oxygen-free reformer was made simple and compact without catalyst. The plasma heating was easy to be controlled, small heat transfer area had easy insulation which could reduce energy loss. N-heptane was used as fuel to be reformed and Reformed molecule HCCI (RM-HCCI) combustion was successfully achieved by injecting the reformed fuel into the engine. The comparison between RM-HCCI and Gasoline HCCI (G-HCCI) combustion were carried out. The results showed that the reformed fuel delayed the ignition, resulting in lower heat transfer losses and exhaust losses, leading eventually to higher indicated thermal efficiency.
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Key words:
- plasma /
- fuel reformer /
- design /
- experiments /
- HCCI combustion /
- indicated thermal efficiency
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表 1 试验控制参数
参数名称 工况1 工况2 工况3 燃烧方式 RM-HCCI G-HCCI G-HCCI 进气压力/bar 1.8 1.8 1.8 进气温度/℃ 62 60 60 当量比 0.275 0.275 0.28 EGR/% 0 0 15 IMEPg/bar 7.5 7.4 7.5 指示热效率/% 53.56 51.23 51.19 RI/(MW·m-2) 3.8 5.6 4.4 Nox/ppm 6.50 7.00 7.00 
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