Effect of supercharger system on power enhancement of hydrogen-fueled spark-ignition engine under low-load condition

• Published in: International journal of hydrogen energy Vol. 46; no. 9; pp. 6928 - 6936
• Main Authors: Nguyen, Ducduy, Choi, Young, Park, Cheolwoong, Kim, Yongrae, Lee, Jeongwoo
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 03.02.2021
• Subjects: Combustion stability; Hydrogen-fueled internal combustion engine; NOx emission; Spark ignition; Supercharger; Thermal efficiency; Supercharger; Spark ignition; NOx emission; Thermal efficiency; Combustion stability; Hydrogen-fueled internal combustion engine
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2020.11.144

Hydrogen energy has received much attention in recent years due to its reliability and non-carbon products. However, it has been found that the backfire phenomenon plays a major part in limiting power and torque in the hydrogen internal combustion engine (H2ICE). Much research in recent years has considered turbocharger as a useful method to improve the power of H2ICE. Although the result of boosting a system with turbocharger became enhanced when compared to the natural aspiration system. Unfortunately, there were unsolved problems in exhaust backpressure and pumping losses that hindering the practical utilisation of H2ICE. This paper investigated the experiment of 2.4 L supercharged port fuel injection engine at 2000 rpm. Air excess ratio (lambda) was varied from stoichiometric to 2.8 by adjusting the boosting amount in supercharger, and throttling of the air. The hydrogen injection amount were maintained the same with turbocharger condition; spark advance timing was set at maximum brake torque. It was observed that by boosting engine with supercharger, the lower pumping loss and higher indicated mean pressure had been obtained when compared to turbocharger boosted engine under low-load condition. However, some additional power required for supercharging that lowers output of the engine. •Potential of using supercharger to increase the power output of a hydrogen engine.•Engine can be operated under very lean condition without abnormal combustion.•NOx emission of the supercharger engine was lower than the turbocharger one.•Hydrogen engine has the stable combustion ability even in very lean mixtures.