Aspects of an experimental study of hydrogen use at automotive diesel engine

Cernat, Alexandru; Pană, Constantin; Negurescu, Niculae; Nutu, C.; Fuiorescu, Dinu; Lăzăroiu, Gheorghe

doi:10.1016/j.heliyon.2023.e13889

Cited by 8 publications

(5 citation statements)

References 19 publications

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“…The maximum Pmax for the operating condition with 15% hydrogen energy share was 8.87 MPa, which was 0.85 MPa higher than the pure diesel operation. This trend is consistent with the findings of Cernat et al [67]. The in-cylinder pressure variation curve and the HRR variation curve reflect the nature of the in-cylinder combustion process of the dual-fuel engine.…”

Section: In-cylinder Pressuresupporting

confidence: 92%

Evaluation of Hydrogen Addition on Combustion and Emission Characteristics of Dual-Fuel Diesel Engines with Different Compression Ratios

Wang,

Li,

et al. 2023

Processes

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In this paper, a computational fluid dynamics (CFD) model was established and verified on the basis of experimental results, and then the effect of hydrogenation addition on combustion and emission characteristics of a diesel–hydrogen dual-fuel engine fueled with hydrogenation addition (0%, 5%, and 10%) under different hydrogenation energy shares (HESs) and compression ratios (CRs) were investigated using CONVERGE3.0 software. And, this work assumed that the hydrogen and air were premixed uniformly. The correctness of the simulation model was verified by experimental data. The values of HES are in the range of 0%, 5%, 10%, and 15%. And, the values of CR are in the range of 14, 16, 18, and 20. The results of this study showed that the addition of hydrogen to diesel fuel has a significant effect on the combustion characteristics and the emission characteristics of diesel engines. When the HES was 15%, the in-cylinder pressure increased by 10.54%. The in-cylinder temperature increased by 15.11%. When the CR was 20, the in-cylinder pressure and the in-cylinder temperature increased by 66.10% and 13.09%, respectively. In all cases, HC, CO, CO2, and soot emissions decreased as the HES increased. But, NOx emission increased.

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Section: In-cylinder Pressuresupporting

confidence: 92%

Evaluation of Hydrogen Addition on Combustion and Emission Characteristics of Dual-Fuel Diesel Engines with Different Compression Ratios

Wang,

Li,

et al. 2023

Processes

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“…The rate of heat release was determined based on equation (1), and the cumulative heat released was determined based on equation ( 2) also taking into account the Wiebeeq. model (3).…”

Section: Analysis Of Heat Releasementioning

confidence: 99%

“…In work conducted by Cernat et al [3], it was found that the the values of maximum pressure rise rate start to increase for hydrogen addition, in correlation with the increase of fuel amount burned into the premixed stage, without exceed the normal values domain with assure the normal and reliable engine operation.…”

Section: Introductionmentioning

confidence: 97%

Numerical investigation on the effects of fueling the Turbulent Jet Ignition gas engine with methane and hydrogen

Pielecha,

Szwajca,

Skobiej

2023

Rail Vehicles/Pojazdy Szynowe

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The modern solution of two-stage combustion, namely the Turbulent Jet Ignition (TJI), enables the combustion of ultra-lean mixtures. Thanks to this solution, it became possible to reduce fuel consumption and, at the same time, to increase the combustion process indicators (including the overall combustion system efficiency). The article presents the results of numerical tests of a heavy-duty engine equipped with the TJI system running on gas fuels. The AVL BOOST software was used to analyze the effects of different fuel injection rates into the pre-chamber and various ignition timing angles, while maintaining a constant global excess air ratio. Increasing the proportion of hydrogen in the pre-chamber resulted in its reduction in the main chamber (the fuel dose was kept constant with different excess air coefficients in each of the chambers). The maximum combustion pressure values in both chambers were investigated. Changes in the amount of heat released and its release rate were determined. As a result of the simulations, different ignition and combustion conditions were presented for the tested fuels. Based on this, maps of fuel dose to prechamber vs. ignition advance angle were drawn up, showing selected thermodynamic indicators of the combustion process.

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“…A. Cernat [28] and his colleagues conducted experiments on the combustion of hydrogen in diesel engines and found that the maximum pressure rise rate was increased after the addition of hydrogen, and NOx and smoke were also reduced. Nurullah Gültekin [29] and his team conducted experiments on a single-cylinder hydrogen-diesel dual-fuel engine.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations of the Hydrogen Injectors on the Combustion Characteristics and Performance of a Hydrogen Internal Combustion Engine

Huang,

Luo,

Sun

et al. 2024

Sustainability

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Hydrogen is regarded as an ideal zero-carbon fuel for an internal combustion engine. However, the low mass flow rate of the hydrogen injector and the low volume heat value of the hydrogen strongly restrict the enhancement of the hydrogen engine performance. This experimental study compared the effects of single-injectors and double-injectors on the engine performance, combustion pressure, heat release rate, and the coefficient of variation (CoVIMEP) based on a single-cylinder 0.5 L port fuel injection hydrogen engine. The results indicated that the number of hydrogen injectors significantly influences the engine performance. The maximum brake power is improved from 4.3 kW to 6.12 kW when adding the injector. The test demonstrates that the utilization of the double-injector leads to a reduction in hydrogen obstruction in the intake manifold, consequently minimizing the pumping losses. The pump mean effective pressure decreased from −0.049 MPa in the single-injector condition to −0.029 MPa in the double-injector condition with the medium loads. Furthermore, the double-injector exhibits excellent performance in reducing the coefficient of variation. The maximum CoVIMEP decreased from 2.18% in the single-injector configuration to 1.92% in the double-injector configuration. This result provides new insights for optimizing hydrogen engine injector design and optimizing the combustion process.

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Aspects of an experimental study of hydrogen use at automotive diesel engine

Cited by 8 publications

References 19 publications

Evaluation of Hydrogen Addition on Combustion and Emission Characteristics of Dual-Fuel Diesel Engines with Different Compression Ratios

Evaluation of Hydrogen Addition on Combustion and Emission Characteristics of Dual-Fuel Diesel Engines with Different Compression Ratios

Numerical investigation on the effects of fueling the Turbulent Jet Ignition gas engine with methane and hydrogen

Experimental Investigations of the Hydrogen Injectors on the Combustion Characteristics and Performance of a Hydrogen Internal Combustion Engine

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