Effect of different volume fractions of ammonia on the combustion and emission characteristics of the hydrogen-fueled engine

被引:79
作者
Xin, Gu [1 ]
Ji, Changwei [1 ]
Wang, Shuofeng [1 ]
Meng, Hao [1 ]
Chang, Ke [1 ]
Yang, Jinxin [1 ]
机构
[1] Beijing Univ Technol, Coll Energy & Power Engn, Beijing Lab New Energy Vehicles & Key Lab Reg Air, Beijing 100124, Peoples R China
基金
中国国家自然科学基金;
关键词
Ignition timing; Combustion; NOx emissions; ICE; H-2; NH3; dual-fuel; SPARK-IGNITION ENGINE; NOX EMISSION; PERFORMANCE; POWER; EGR; REDUCTION; PRESSURE; DILUTION; STABILITY; MIXTURES;
D O I
10.1016/j.ijhydene.2022.03.103
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Hydrogen internal combustion engines (ICE) will play an important role in reducing carbon emissions, but low power density and abnormal combustion problems are the main obstacles restricting the promotion of hydrogen ICE. Ammonia is a low-reactivity renewable fuel. The purpose of this study is to study the effect of different ammonia-added volume fractions on hydrogen ICE. In this experimental study, the combustion and emission characteristics of an engine fueled by a hydrogen/ammonia mixture were evaluated at part-load operating conditions. The experiment was carried out on a modified engine, the engine speed was 1300 rpm, the absolute pressure of the manifold was 61 kPa, and the volume fraction of ammonia added was 5.2%, 7.96%, and 10.68%, respectively. The test results show that the addition of ammonia changes the combustion characteristics of hydrogen. As the volume fraction of ammonia added increases, the flame development period and flame propagation period are both prolonged, and the peak heat release rate decreases. The addition of ammonia increases the power of the engine and reduces the indicated thermal efficiency. At the ignition timing of the maximum braking torque, as the volume fraction of ammonia added increases, the indicated mean effective pressure and indicated thermal efficiency increase. Adding ammonia volume fraction has little effect on Nitrogen oxides (NOx) emissions, and NOx emissions gradually increase with the delay of ignition timing. (c) 2022 Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC.
引用
收藏
页码:16297 / 16308
页数:12
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