Hybrid emission and combustion modeling of hydrogen fueled engines

Shahpouri, Saeid; Gordon, David C.; Hayduk, Christopher; Rezaei, Reza; Koch, Charles Robert; Shahbakhti, Mahdi

doi:10.1016/j.ijhydene.2023.03.153

Cited by 8 publications

(6 citation statements)

References 65 publications

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“…The reduction in the emission of nitrogen oxides can be attributed to the reduction in the amount of oxygen available per cycle, along with the increase in the dose of hydrogen, noting that the lambda is reduced from 1.987 for the classic fuel to the value 1.561 for XE=0.25 and to the value 1.493 for XE =0.3. Similar results of nitrogen oxides reduction were obtained by other researchers [1][2][3]9].…”

Section: Resultssupporting

confidence: 90%

“…In correlation with the pressure variation, figure 1, the angle of maximum temperature appears closer to TDC once hydrogen quantity increase, closer with 10 degrees for XE=0.25 and with 11 degrees for XE=0.30 which may represent the increase of isocore combustion share. Similar results and tendency variations for in-cylinder temperature were obtained by other researchers [1,4,5,8,9,12] The speed of soot oxidation speed increase with 35.4% for XE=0.25 and with 36.5% for XE=0.30, versus XE=0. Due to hydrogen higher burning speed, the presence of hydrogen in the air-fuel mixture accelerate the soot oxidation, figure 6.…”

Section: Resultssupporting

confidence: 89%

“…The level of the soot starts to decrease at H2 use, in conditions that hydrogen provides lower soot quantities which are faster oxidation by the hydrogen-diesel fuel flames. Soot reduction was achieved also by others researchers [1,9]. Combustion of the air-hydrogen mixture leads to the rise of the HRR, pressure and temperature of the in-cylinder gases which increase the peak of the NO formation speed, but in condition of a lower NO quantities due to reduction of the classic fuel amount that which burn into the rapid stage of combustion once with the decrease of the diesel cyclic dose at the XE increase.…”

Section: Resultsmentioning

confidence: 82%

“…1303 (2024) 012016 IOP Publishing doi:10.1088/1757-899X/1303/1/012016 2 Some researchers use hydrogen as fuel for engines, good perspectives results being shown. Shahpouri [1] develops o study based on a simulation with one-dimensional model used for hydrogen fuelling to predict the level of the pollutant gases to an ICE. Shahpouri observes the increase of the incylinder temperature, which may affect the NOx level in the exhaust gases, which may require a special tune for amelioration of the NOx and soot emissions level.…”

Section: Introductionmentioning

confidence: 99%

“…In general, at hydrogen fuelling, the NOx emission level is higher, depending on fuels cyclic quantities, but emission levels for soot, PM, CO, unburn HC and CO2 are decreased by hydrogen. The thermal efficiency is increased [1]. Anticaglia [2] develops a one dimensional CFD model to study the possibilities to increase of the brake thermal efficiency and to decrease the NOx emission level at internal combustion engines fuelled by hydrogen.…”

Section: Introductionmentioning

confidence: 99%

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Aspects of combustion in diesel engine at hydrogen use-a theoretical approach

Cernat,

Negurescu,

Pana

et al. 2024

IOP Conf. Ser.: Mater. Sci. Eng.

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The use of alternative fuel may be a viable solution in order to ameliorate the engine performance especially in terms of pollutant emissions. Among the alternative fuels that can be use to fuel internal combustion engines hydrogen can be a viable alternative fuel especially due to the advantage of reducing the carbon emission at its use as alternative fuel even for partial substitution of classic fuel. Hydrogen has good combustion properties like higher Lower Heating Value, large inflammability limits, higher combustion speed, which may has a benefic influence on combustion process. The use of hydrogen to diesel engine bring few important issues that must be solved in order to assure the normal engine operation, starting with the fuelling system and engine with the control of the combustion process. The paper presents some results obtained during the theoretical modeling of the in-cylinder process at a diesel engine fuelled with classic fuel and hydrogen. The diesel fuel is energetically substituted by hydrogen in percent’s of 25% and 30%. The influences of hydrogen use on in-cylinder maximum pressure, maximum pressure rise rate, heat release rate, combustion temperature, indicated thermal efficiency and nitrogen oxides and smoke emission levels are shown and analyzed.

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Section: Resultssupporting

confidence: 90%