Effect of hydrogen addition using on-board alkaline electrolyser on SI engine emissions and combustion

Karagöz, Yasin; Balcı, Özgün; Orak, Emre; Habib, Mostafa S.

doi:10.1016/j.ijhydene.2018.04.235

Cited by 20 publications

(7 citation statements)

References 19 publications

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“…At engine speed of 1500 rpm CO concentration decreased by 0.707 %, 3000 rpm by 0.301 %, 4500 rpm by 0.483 %, and at 6000 rpm by 0.852 % comparing when engine works with biogas. Emission reductions are due to the fact that hydrogen is carbon-free fuel and reduces fuel mixture C/H ratio, furthermore H 2 have high flame rate, increases in-cylinder temperature and combustion efficiency [18], [19].…”

Section: Resultsmentioning

confidence: 99%

Simulation of spark ignition engine performance working on biogas hydrogen mixture

2018

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Numerical simulations of Nissan Qashqai HR16DE engine with increased compression ratio from 10,7:1 to 13,5:1 was carried out using AVL BOOST software. Modelled engine work cycles while engine works with biogas (BG) and hydrogen (H2) mixtures. For biogas used mixture of 35 % carbon dioxide (CO2) and 65 % methane (CH4). Three mixtures of biogas with added 5 %, 10 % and 15 % H2 was made. The simulation of engine work cycles was performed at fully opened throttle and changing engine crankshaft rotation speeds: ne1 = 1500, ne2 = 3000, ne3 = 4500, ne4 = 6000 rpm. Simulation results demonstrated what adding hydrogen to biogas increase in-cylinder temperature and nitrogen oxides (NOx) concentration because of higher mixtures lower heating values (LHV) and better combustion process. Other emissions of carbon monoxide (CO) and hydrocarbons (HC) decreased while adding hydrogen due to the fact that hydrogen is carbon-free fuel.

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Section: Resultsmentioning

confidence: 99%

Simulation of spark ignition engine performance working on biogas hydrogen mixture

2018

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“…Finally, the electrolyzer efficiency is introduced by eq. ( 8) to evaluate the overall performance [25].…”

Section: Electrolyzermentioning

confidence: 99%

Experimental and economic assessment of alkaline electrolyzer for dual-fuel operation in low-displacement diesel engines

Maestre-Cambronel

Hernández

Forero

2021

DYNA

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This investigation evaluated the integration of an alkaline electrolyzer for dual-fuel operation in an experimental test bench of a diesel engine from a techno-economic viewpoint. The characterization of the electrolyzer operation indicated that higher electrolyte (KOH) concentrations (30 – 40% w/w) improve the overall performance since less voltage is required for electrolysis, thus featuring higher efficiencies (50 – 60%) and hydrogen production (4 – 6 LPM). The economic analysis demonstrated that hydrogen cost remains competitive (4.3 - 5.6 USD/kg), and it is greatly dependent on the electrolyte concentration. Additionally, the operation of the engine with hydrogen injection at 20 LPM and a palm biodiesel blend reduced the fuel consumption rate between 10 – 31% depending on the load rate when compared to pure diesel. In contrast, dual-fuel operation generated a minor reduction in fuel conversion efficiency (< 5%), which reflects on the power output. Overall, this technology stands as a promising avenue to improve the fuel utilization ratio.

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“…Based on (19), the stability of the AC microgrid system is analysed with parameters in Table 3, and the results are shown in Fig. 7.…”

Section: Stability Analysis Of the Coordination Control Strategy In Tmentioning

confidence: 99%

“…Furthermore, hydrogen can reduce the environmental pollution by replacing the traditional fossil fuels, and has been applied in the aspects such as fuel cell, rocket fuel, hydrogen irrigation, hydrogen metallurgy, hydrogen treatment, and so on. The current electrolysis equipment mainly contains the high-temperature solid oxide electrolyser and the alkaline electrolyser [17][18][19][20]. The strict hightemperature environment could avail the energy conversion efficiency in the former situation, but it will hamper the wide application in practical.…”

Section: Introductionmentioning

confidence: 99%

Decentralised coordination control strategy of the PV generator, storage battery and hydrogen production unit in islanded AC microgrid

Zhang

Wei

2020

IET Renewable Power Generation

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The fluctuation and intermittence of the distributed renewable energy sources (RESs) limit the connection to the main grid and cause large-scale power curtailment. This issue can be addressed by the application of a hydrogen production unit (HPU), which is compatible with the disadvantages of RESs and can achieve large-capacity and long-term absorption of the electric energy. A decentralised coordination control strategy among the generation, storage and HPU are proposed in the photovoltaic (PV) dominated islanded AC microgrid. Firstly, the energy conversion efficiency from electric energy to hydrogen energy of HPU is derived, based on which the efficiency adaptive control is proposed to regulate its power consumption by adjusting the efficiency reference according to the bus frequency. Secondly, the state of charge and the instantaneous power of the storage are considered in the control strategy, which can avoid the storage being overused or damaged. Thirdly, the control strategy of the PV generator is designed to adaptively regulate its output power from maximum power point tracking mode to the reference power point mode seamlessly. Finally, the stability of the whole control strategy is analysed and the control effectiveness is verified based on the RTLAB experiment platform.

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Effect of hydrogen addition using on-board alkaline electrolyser on SI engine emissions and combustion

Cited by 20 publications

References 19 publications

Simulation of spark ignition engine performance working on biogas hydrogen mixture

Simulation of spark ignition engine performance working on biogas hydrogen mixture

Experimental and economic assessment of alkaline electrolyzer for dual-fuel operation in low-displacement diesel engines

Decentralised coordination control strategy of the PV generator, storage battery and hydrogen production unit in islanded AC microgrid

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