Performance and combustion analysis of hydrogen-fuelled C.I. engine with EGR

Yadav, Vinod Singh; Sharma, Dilip; Soni, Shyam Lal

doi:10.1016/j.ijhydene.2015.01.162

Cited by 43 publications

(9 citation statements)

References 6 publications

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“…Thus, to further raise the burning speed and obtain stronger squish flow in the Wankel engine, hydrogen enrichment seems to offer improvements [17,29,30]. Hydrogen is characterized by having the highest mass energy density of any fuel (120.1 MJ/kg vs. 26.9 MJ/kg of ethanol) and the highest stoichiometric air/fuel ratio (34.3 vs. 9 of ethanol), so, hydrogen addition could potentially reduce the specific fuel consumption of the ethanol engine [29,31]. Moreover, hydrogen has a wider flammable mixture range and low ignition energy, a high diffusion rate and a significantly faster laminar burning velocity [17,30,32].…”

Section: Introductionmentioning

confidence: 99%

An experimental study of a hydrogen-enriched ethanol fueled Wankel rotary engine at ultra lean and full load conditions

Amrouche

Erickson

Varnhagen

et al. 2016

Energy Conversion and Management

117

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Section: Introductionmentioning

confidence: 99%

An experimental study of a hydrogen-enriched ethanol fueled Wankel rotary engine at ultra lean and full load conditions

Amrouche

Erickson

Varnhagen

et al. 2016

Energy Conversion and Management

117

View full text Add to dashboard Cite

“…Efforts have been under way since the 1980s to apply hydrogen to various types of internal combustion engines. [1][2][3][4][5][6][7][8][9][10][11][12] In addition, numerous studies have been conducted on applying a direct-injection system to hydrogen engines in order to improve power output and eliminate backfiring under high-load operating condition. [13][14][15][16][17][18][19] In recent years, numerical analysis of hydrogen combustion and research and development work aimed at applying hydrogen to large vehicles such as trucks and buses have been actively carried out.…”

Section: Introductionmentioning

confidence: 99%

Effect of modified combustion chamber configuration and enhanced squish flow on improving thermal efficiency in jet-plume-controlled direct-injection near-zero emission hydrogen engines

Oikawa

Mogi

Horiguchi

et al. 2022

International Journal of Engine Research

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In direct injection hydrogen engines, the Plume Ignition and Combustion Concept (PCC) developed by the authors has been applied to improve thermal efficiency and reduce NOx emissions under high-load operation. The PCC combustion method burns an optimized hydrogen jet plume that is ignited immediately upon completion of injection in the latter half of the compression stroke. In addition to optimizing the hydrogen jet configuration, this basic combustion concept was applied to burn a lean mixture and supercharging was used to recover the decline in power output due to combustion of a diluted mixture. As a result, a near-zero emission engine has been achieved that simultaneously provides high thermal efficiency, high power output and low NOx emissions at a single-digit ppm level. Various techniques have been applied to improve thermal efficiency further and achieve much lower NOx emissions close to a zero-emission target. These included the adoption of a re-entrant combustion chamber to reduce unburned hydrogen emissions, enhanced squish flow to promote better mixing of air and the hydrogen jet injected into the combustion chamber, and a narrower nozzle hole diameter to promote entrainment of air into the hydrogen jet. In this study, the effect of each of these measures was made clear experimentally and by analysis. This paper presents the results obtained.

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“…Controlling NOx emissions from hydrogen-fueled engines can be achieved by means of LTC technology using delayed ignition angles, lean burns, and EGR. Controlling the hydrogen injection amount and the EGR system increases the specific heat capacity of the gas in the cylinder and slows down the combustion rate, which in turn reduces the combustion temperature and, thus, the NOx emissions [14,15]. In addition, if the EGR post-gas mixture reaches a stoichiometric ratio, a three-way catalytic converter could be used to reduce the NOx emissions.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Investigation on De-NOx Technology and Abnormal Combustion Control for a Hydrogen Engine with EGR System

et al. 2020

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The combustion emissions of the hydrogen-fueled engines are very clean, but the problems of abnormal combustion and high NOx emissions limit their applications. Nowadays hydrogen engines use exhaust gas recirculation (EGR) technology to control the intensity of premixed combustion and reduce the NOx emissions. This study aims at improving the abnormal combustion and decreasing the NOx emissions of the hydrogen engine by applying a three-dimensional (3D) computational fluid dynamics (CFD) model of a single-cylinder hydrogen-fueled engine equipped with an EGR system. The results indicated that peak in-cylinder pressure continuously increased with the increase of the ignition advance angle and was closer to the top dead center (TDC). In addition, the mixture was burned violently near the theoretical air–fuel ratio, and the combustion duration was shortened. Moreover, the NOx emissions, the average pressure, and the in-cylinder temperature decreased as the EGR ratio increased. Furthermore, increasing the EGR ratio led to an increase in the combustion duration and a decrease in the peak heat release rate. EGR system could delay the spontaneous combustion reaction of the end-gas and reduce the probability of knocking. The pressure rise rate was controlled and the in-cylinder hot spots were reduced by the EGR system, which could suppress the occurrence of the pre-ignition in the hydrogen engine.

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Performance and combustion analysis of hydrogen-fuelled C.I. engine with EGR

Cited by 43 publications

References 6 publications

An experimental study of a hydrogen-enriched ethanol fueled Wankel rotary engine at ultra lean and full load conditions

An experimental study of a hydrogen-enriched ethanol fueled Wankel rotary engine at ultra lean and full load conditions

Effect of modified combustion chamber configuration and enhanced squish flow on improving thermal efficiency in jet-plume-controlled direct-injection near-zero emission hydrogen engines

A Numerical Investigation on De-NOx Technology and Abnormal Combustion Control for a Hydrogen Engine with EGR System

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