氨-生物燃料双燃料发动机的燃烧与排放特性

doi:10.19562/j.chinasae.qcgc.2024.04.008

Abstract

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

Kaiyuan Cai,Wei Wang,Ziqing Zhao,Xiao Ma,Yunliang Qi,Li Li,Zhi Wang. Combustion and Emission Characteristics of an Ammonia-Biofuel Dual-Fuel Engine[J].Automotive Engineering, 2024, 46(4): 626-633.

Figures/Tables 11

References 45

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参数	数值
排量/L	1.85
缸径/mm	123
冲程/mm	156
连杆长度/mm	228
压缩比	17.3

参数	生物柴油	汽油	乙醇^［34］
密度/（kg·L^-1）	0.872	0.743	0.790
十六烷值	60.9
辛烷值		92.0	108.0
碳质量分数/%	74.36	86.56	52.18
氢质量分数/%	13.26	13.01	13.04
氧质量分数/%	12.38	0.04	34.78
运动黏度（20 ℃）/（mm²·s^-1）	4.42	0.70^［35］	1.60^［36］
汽化潜热/（ kJ·kg^-1）	300^［37］	290^［38］	854^［38］
低热值/（MJ·kg^-1）	38.29	42.84	26.95

参数	柴油	BG70	BG50E20	氨^［40］
十六烷值	56.5	23.3	19.5
研究法辛烷值				130.0
碳质量分数/%	86.45	80.44	74.22	0.00
氢质量分数/%	13.49	12.85	12.94	17.65
氧质量分数/%	0.05	6.71	12.84	0.00
氮质量分数/%	0	0	0	82.35
运动黏度（20 ℃）/ （mm²·s^-1）	4.22^［36］	1.31	1.79
汽化潜热/ （kJ·kg^-1）	230^［38］	293	406
低热值/（MJ·kg^-1）	42.68	41.32	38.16	18.80

参数	数值
转速/（r·min^-1）	1 200
IMEP/MPa	0.8
氨能量替代率/%	0~28
进气道喷射脉宽/（°CA）	变化
进气道喷射时刻/（°CA ATDC）	-360
进气道喷射压力/MPa	0.4
直喷第1次喷射脉宽/（°CA）	0.3
直喷第1次喷射时刻/（°CA ATDC）	-15.5
直喷第2次喷射脉宽/（°CA）	变化
直喷第2次喷射时刻/（°CA ATDC）	0
高压共轨压力/MPa	100

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

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