A comparative study on NH3/H2 and NH3/CH3OH combustion and emission in an optical SI engine

Fuel, Год журнала: 2024, Номер 369, С. 131731 - 131731

Опубликована: Апрель 26, 2024

Язык: Английский

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Advancements and Challenges of Ammonia as a Sustainable Fuel for the Maritime Industry

Energies, Год журнала: 2024, Номер 17(13), С. 3183 - 3183

Опубликована: Июнь 28, 2024

The maritime industry needs sustainable, low-emission fuels to reduce the environmental impact. Ammonia is one of most promising alternative because it can be produced from renewable energy, such as wind and solar. Furthermore, ammonia combustion does not emit carbon. This review article covers advantages disadvantages using a sustainable marine fuel. We start by discussing regulations concerns shipping sector, which responsible for around 2% 3% global energy-related CO2 emissions. These emissions may increase grows at compound annual growth rate 4.33%. Next, we analyze use fuel in detail, presents several challenges. challenges include high price compared other fossil fuels, low reactivity toxicity ammonia, NOx, N2O resulting incomplete combustion, an inefficient process, NH3 slipping. However, emphasize how overcome these discuss techniques NOx emissions, co-combustion improve reactivity, waste heat recovery strategies, regulatory framework, safety conditions. Finally, address market trends

Язык: Английский

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Combination of G-Equation and Detailed Chemistry: An application to 3D-CFD hydrogen combustion simulations to predict NOx emissions in reciprocating internal combustion engines

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 89, С. 161 - 176

Опубликована: Сен. 26, 2024

Язык: Английский

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Optical study on the auto-ignition and knocking behaviors of ammonia/PODE RCCI mode

Fuel, Год журнала: 2024, Номер 381, С. 133467 - 133467

Опубликована: Окт. 21, 2024

Язык: Английский

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Evaluating Ammonia as a Marine Fuel: Review and Illustration

Environmental Modeling & Assessment, Год журнала: 2025, Номер unknown

Опубликована: Март 15, 2025

Язык: Английский

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Proposal and Validation of 3D-CFD Framework for Ultra-Lean Hydrogen Combustion in ICEs

SAE technical papers on CD-ROM/SAE technical paper series, Год журнала: 2024, Номер unknown

Опубликована: Апрель 9, 2024

<div class="section abstract"><div class="htmlview paragraph">In recent months, the increasing debate within European Union to review ban on internal combustion engines has led pursuit of environmentally neutral solutions for ICEs, as an attempt promote greater economic and social sustainability. Interest in remains strong uphold principle technological neutrality. In this perspective, present paper proposes a numerical methodology 3D-CFD in-cylinder simulations hydrogen-fueled engines. The modelling relies G-equation formulation, along with Damköhler Verhelst turbulent laminar flame speeds, respectively. Numerical are validated pressure traces images chemiluminescent hydrogen flames captured through piston single-cylinder optical spark-ignition engine. To mitigate uncertainties related modeling mixture stratification injection, is port-injected continuously supplied into intake pipe ensure homogeneity. Therefore, main challenge study represented by accurate characterization propagation, which key element validation computational framework. regard, remarkable alignment between experiments achieved terms imaging, evidencing model’s capabilities. carried out at different equivalence ratios, demonstrating reliability framework consistently reproduce results without need case-by-case adjustments.</div></div>

Язык: Английский

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Pressure oscillation mechanisms and heat transfer characteristics of non-auto-ignition knock induced by Thermo-Pressure Excitation in turbulent jet ignition engines

Applied Thermal Engineering, Год журнала: 2025, Номер 269, С. 126047 - 126047

Опубликована: Фев. 24, 2025

Язык: Английский

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3D-CFD Simulations of H2 ICEs: A Preliminary Evaluation of a Laminar Flame Speed Correction for Thermo-Diffusive Instability

SAE technical papers on CD-ROM/SAE technical paper series, Год журнала: 2025, Номер 1

Опубликована: Апрель 18, 2025

<div class="section abstract"><div class="htmlview paragraph">In recent years, climate change and geopolitical instability have intensified the focus on sustainable power generation. This shift seeks alternatives that balance environmental impact, cost-effectiveness, practicality. Specifically, in transportation generation, electric motors face challenges against internal combustion engines due to high cost mass of batteries required for energy storage. makes solutions less favorable these sectors. Conversely, engines, when properly fueled, offer cost-effectiveness a quasi-environmentally-neutral option. To address challenges, researchers explored e-fuels derived from renewable sources as carbon-neutral supply engines. Among these, hydrogen is particularly promising. In hydrogen-powered 3D-CFD (Computational Fluid Dynamics) in-cylinder models are crucial. Once validated, can speed up design process. A key challenge simulating H2 accurately representing flame thermo-diffusive instabilities lean mixtures, which vital peak engine efficiency. Accurate representation process under conditions thus mandatory models. study represents preliminary effort incorporate into framework. An extensively validated numerical framework was modified include instability-induced acceleration propagation speed. The outcomes were analyzed compared with results obtained without correction term. Although improvements limited certain operating conditions, underscored importance considering influence turbulence instability.</div></div>

Язык: Английский

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Turbulent combustion modeling for internal combustion engine CFD: A review

Progress in Energy and Combustion Science, Год журнала: 2024, Номер 106, С. 101200 - 101200

Опубликована: Ноя. 6, 2024

Язык: Английский

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Numerical investigation of catalytic effect of platinum porous media on the combustion characteristics of hydrogen/ammonia blend

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 98, С. 1155 - 1173

Опубликована: Дек. 14, 2024

Язык: Английский

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