汽车工程 ›› 2024, Vol. 46 ›› Issue (4): 626-633.doi: 10.19562/j.chinasae.qcgc.2024.04.008

• • 上一篇    

氨-生物燃料双燃料发动机的燃烧与排放特性

蔡开源1,王巍1,赵自庆1,马骁1,齐运亮1,李莉2(),王志1   

  1. 1.清华大学车辆与运载学院,北京 100084
    2.西安交通大学城市学院机械工程系,西安 710018
  • 收稿日期:2023-09-20 修回日期:2023-10-19 出版日期:2024-04-25 发布日期:2024-04-24
  • 通讯作者: 李莉 E-mail:liull76@163.com
  • 基金资助:
    国家自然科学基金(T2241003);陕西省自然科学基础研究计划(2022JM-297)

Combustion and Emission Characteristics of an Ammonia-Biofuel Dual-Fuel Engine

Kaiyuan Cai1,Wei Wang1,Ziqing Zhao1,Xiao Ma1,Yunliang Qi1,Li Li2(),Zhi Wang1   

  1. 1.School of Vehicle and Mobility,Tsinghua University,Beijing  100084
    2.Department of Mechanical Engineering,Xi’an Jiaotong University City College,Xi’an  710018
  • Received:2023-09-20 Revised:2023-10-19 Online:2024-04-25 Published:2024-04-24
  • Contact: Li Li E-mail:liull76@163.com

摘要:

针对双碳目标,应用低碳/零碳燃料是实现内燃机高效清洁燃烧的有效途径。本研究基于一个双燃料柴油机台架开展,缸内直喷燃料分别选用柴油、生物柴油/汽油混合燃料(BG70)和生物柴油/汽油/乙醇混合燃料(BG50E20);氨为进气道喷射,能量替代率为0~28%。试验工况为1 200 r/min、0.8 MPa指示平均有效压力(IMEP)。对比分析了不同燃料的一氧化碳(CO)、总碳氢(THC)、氮氧化物(NO x )排放以及颗粒物粒径分布。结果表明:单燃料模式下,BG70和BG50E20的指示热效率高于柴油。BG70的CO排放相比柴油降低30%,但THC和NO x 排放在3种燃料中最高。BG70和BG50E20的总颗粒物数量(TPN)排放低于柴油。相比各燃料单燃料模式的燃烧与排放性能,添加氨后的3种燃料的指示热效率降低1%~2%; CO排放增加约1倍;柴油和BG70的NO x 排放减少接近50%,BG50E20的NO x 排放减少约30%。另外,氨的加入对BG70和BG50E20的TPN有显著影响,当氨能量替代率从0增长至28%时,BG70的TPN排放增加20倍。

关键词: 氨, 生物柴油, 乙醇, 燃烧, 排放

Abstract:

The application of low-carbon/zero carbon fuels is an effective way to achieve high efficiency and clean combustion of internal combustion engines in response to the goal of ‘carbon-peak and carbon- neutrality’. The study is based on a dual-fuel diesel engine bench. Diesel, blends of biodiesel and gasoline (BG70) and blends of biodiesel, gasoline and ethanol (BG50E20) are chosen as the direct injection fuels. Ammonia is injected into the intake port and the ammonia energy replacement (AER) is 0~28%. The engine speed is 1 200 r/min and the indicated mean effective pressure (IMEP) is 0.8 MPa. The CO, THC, NOx and particle number distributions are compared and analyzed. The results shows that the BG70 and BG50E20 show higher indicated efficiency than that of diesel under single-fuel mode. BG70 reduces CO emission by 30% compared to diesel. However, the THC and NOx emissions are the highest. The total particle number (TPN) emissions of BG70 and BG50E20 are lower than that of diesel. Compared to the combustion and emission characteristics of each fuel under single-fuel mode, adding ammonia leads to a 1%~2% decreasing of the indicated efficiency and doubles the CO emission. The NOx emissions of diesel and BG70 are reduced by nearly 50%, while the reduction of BG50E20 is about 30%. Also, ammonia shows significant effect on the TPN emissions of BG70 and BG50E20. The TPN emission of BG70 increases by 20 times when the AER grows from 0 to 28%.

Key words: ammonia, biodiesel, ethanol, combustion, emission