氨-生物燃料双燃料发动机的燃烧与排放特性  

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

作　　者：蔡开源 王巍[1] 赵自庆 马骁[1] 齐运亮[1] 李莉 王志[1] Cai Kaiyuan;Wang Wei;Zhao Ziqing;Ma Xiao;Qi Yuniang;Li Li;Wang Zhi(School of Vehicle and Mobility,Tsinghua University,Beijing 100084;Department of Mechanical Engineering,Xi’an Jiaotong University City College,Xi’an 710018)

机构地区：[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

出　　处：《汽车工程》2024年第4期626-633,681,共9页Automotive Engineering

基　　金：国家自然科学基金(T2241003);陕西省自然科学基础研究计划(2022JM-297)资助。

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1200 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(NOx)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NOx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NOx排放减少接近50%,BG50E20的NOx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。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-neutrali‐ty’.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 1200 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 ammo‐nia leads to a 1%~2%decreasing of the indicated efficiency and doubles the CO emission.The NOx emissions of die‐sel and BG70 are reduced by nearly 50%,while the reduction of BG50E20 is about 30%.Also,ammonia shows sig‐nificant 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%.

关 键 词：氨 生物柴油 乙醇 燃烧 排放 

分 类 号：U464[机械工程—车辆工程]