Mechanical engineering advantages of a dual fuel diesel engine powered by diesel and aqueous ammonia blends

Al‐Dawody, Mohamed F.; Al-Obaidi, Wisam; Aboud, Emad D.; Abdulwahid, Mohammed A.; Al‐Farhany, Khaled; Jamshed, Wasim; Eid, Mohamed R.; Raizah, Zehba; Iqbal, Amjad

doi:10.1016/j.fuel.2023.128398

Cited by 27 publications

(7 citation statements)

References 31 publications

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“…The conservation of energy, governed by Eq. ( 5), indicates that the net sum of the rate of displacement work, heat transfer rate, and enthalpy flux is equal to the change of energy within the system [1] .…”

Section: Diesel Rk Modelmentioning

confidence: 99%

“…The evolution of the spray is addressed in the context of the Diesel RK model and illustrated in Fig. (1), where the position and velocity of an elementary fuel mass (EFM) are related during small time intervals, moving from the injector to the spray tip [9] .…”

Section: Spray Evolutionmentioning

confidence: 99%

“…The calculation of heat release is divided into four distinct phases, each with specific physical and chemical characteristics governing the combustion rate [1] . These phases include:…”

Section: Heat Release Calculationmentioning

confidence: 99%

“…In this context, the Scania engine was chosen as the central point of analysis, a 6-cylinder engine with a power of 505.8CV, operating with commercial diesel oil. Data about this engine are detailed in Table (1). This specific choice of the engine establishes a robust and representative foundation for the proposed analyses.…”

Section: Engine Data and Simulationmentioning

confidence: 99%

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Optimizing Performance and Sustainability: A Comprehensive Analysis of an Internal Combustion Engine Powered by Tire and Biomass Pyrolysis Oil

Prudente,

Leal,

Santana

2023

Preprint

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The effective management of waste tires poses a critical and urgent challenge in today's environmental landscape. These discarded tires endure an astonishing degradation period of approximately 600 years, emphasizing the need to urgently adopt techniques that expedite this process in an environmentally responsible manner to protect our planet. Tackling this issue involves exploring the conversion of waste tires into diesel fuel, a promising solution to mitigate the problem. Achieving sustainable progress requires a keen focus on the energy and exergy efficiency of systems, crucial aspects in this endeavor. Therefore, this study is dedicated to a comprehensive and sustainable assessment that compares conventional petroleum-derived diesel (diesel oil) with pyrolytic oils derived from rubber waste, inoperable tires, and Eucalyptus urograndis wood. These oils are intended for use in compression ignition internal combustion engines. The methodological framework of this work involves an in-depth exploration encompassing energy, exergy, and environmental analyses in a steady-state context. Using the Diesel RK software, combustion is simulated with fuel specifications sourced from established literature. The investigation is conducted within a Scania diesel stationary engine under varying scenarios. First, blends of tire pyrolysis oil (TPO) and diesel are examined, specifically in proportions of 10% TPO and 90% diesel, followed by 20% TPO and 80% diesel. Second, mixtures of Eucalyptus urograndis pyrolytic bio-oil (EPO) at ratios of 10% EPO and 90% diesel, as well as 20% EPO and 80% diesel, are considered. Lastly, the study examines the performance of conventional commercial diesel fuel. Through meticulous analysis, discernible outcomes emerge, revealing the energy and exergy performance characteristics. Notably, the parameters studied indicate a notable resemblance between diesel and TPO10 across all cases, with TPO10 emerging as the frontrunner in these analyses, closely followed by TPO20. Moreover, the study incorporates a sustainability perspective, highlighting opportunities for improvement, ecological metrics, and the emission profile of pollutants.

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Section: Diesel Rk Modelmentioning

confidence: 99%

Section: Spray Evolutionmentioning

confidence: 99%

“…The calculation of heat release is divided into four distinct phases, each with specific physical and chemical characteristics governing the combustion rate [1] . These phases include:…”

Section: Heat Release Calculationmentioning

confidence: 99%

Section: Engine Data and Simulationmentioning

confidence: 99%

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Optimizing Performance and Sustainability: A Comprehensive Analysis of an Internal Combustion Engine Powered by Tire and Biomass Pyrolysis Oil

Prudente,

Leal,

Santana

2023

Preprint

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“…The authors found that the best compromise between reducing all emissions can be achieved by replacing diesel with 35.9% ammonia, despite the production of N 2 O. To optimize the energy yield from ammonia, Chen et al [16] investigated the application of aqueous ammonia in a dual-fuel engine. Three percentages of ammonia supplementation were studied, showing a reduction in combustion pressure and heat release, but also a significant reduction in NO x (up to 61.75%) and soot (up to 51.04%) emissions due to the replacement of diesel by a carbon-free fuel, despite a reduction in engine performance.…”

Section: Introductionmentioning

confidence: 99%

Computational Investigation of the Influence of Combustion Chamber Characteristics on a Heavy-Duty Ammonia Diesel Dual Fuel Engine

Sehili,

Loubar,

Tarabet

et al. 2024

Energies

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In response to increasingly stringent emissions regulations and the depletion of conventional fuel sources, integrating carbon-free fuels into the transport sector has become imperative. While hydrogen (H2) presents significant technical challenges, ammonia (NH3) could present a better alternative offering ease of transport, storage, and distribution, with both ecological and economic advantages. However, ammonia substitution leads to high emissions of unburned NH3, particularly at high loads. Combustion chamber retrofitting has proven to be an effective approach to remedy this problem. In order to overcome the problems associated with the difficult combustion of ammonia in engines, this study aims to investigate the effect of the piston bowl shape of an ammonia/diesel dual fuel engine on the combustion process. The primary objective is to determine the optimal configuration that offers superior engine performance under high load conditions and with high ammonia rates. In this study, a multi-objective optimization approach is used to control the creation of geometries and the swirl rate under the CONVERGETM 3.1 code. To maximize indicated thermal efficiency and demonstrate the influence of hydrogen enrichment on ammonia combustion in ammonia/diesel dual fuel engines, a synergistic approach incorporating hydrogen enrichment of the primary fuel was implemented. Notably, the optimum configuration, featuring an 85% energy contribution from ammonia, outperforms others in terms of combustion efficiency and pollutant reduction. It achieves over 43% reduction in unburned NH3 emissions and a substantial 31% improvement in indicated thermal efficiency.

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The effect of biogas and dimethyl ether on the thermal characteristics of a dual‐fuel diesel engine: A numerical study

Al‐Dawody,

Imtiaz,

Katbar

et al. 2023

Biofuels Bioprod Bioref

Self Cite

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This investigation used the Diesel‐RK simulation program to carry out a numerical analysis of the effects that dual‐fuel mixes have on the combustion, performance, and emissions of a dual‐fuel diesel engine. It applied the multizone combustion model, and the controlling equations were solved for each individual combustion region. The engine characteristics were examined under the following scenario: it was initially powered by single‐fuel regular diesel (DF), then it switched to dual‐fuel use with 20% biogas, and then it was changed again with the use of 30% dimethyl ether (DME). On this basis, the mentioned biogas and DME ratios were used. The results showed that combustion pressure for the operation of 30% DME and 20% biogas was reduced by 2.45% and 9.57%, respectively, with respect to diesel fuel alone. The Sauter mean diameter (SMD) of the droplets was reduced by 12.6% for 30% DME and 16.2% for 20% biogas. Heat release and brake thermal efficacy (BTE) were reduced slightly with the use of biogas or DME in comparison with DF. The brake‐specific fuel consumption (BSFC) increased by 15.27% and 8.34%, with 30% DME and 20% biogas respectively due to the difference in the energy content of the tested fuels. Nitrogen oxide emissions decreased by 2% and 28% for the operation of 30% DME and 20% biogas, respectively. The summary emission equation (SE), which describes the combination of NOx and PM emissions, decreased by 4.23% and 5.40% with 30% DME and 20% biogas respectively. Based on the results, this paper recommends the use of 20% biogas with diesel rather than 30% DME. The current findings matched well with other scientists' results.

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Mechanical engineering advantages of a dual fuel diesel engine powered by diesel and aqueous ammonia blends

Cited by 27 publications

References 31 publications

Optimizing Performance and Sustainability: A Comprehensive Analysis of an Internal Combustion Engine Powered by Tire and Biomass Pyrolysis Oil

Optimizing Performance and Sustainability: A Comprehensive Analysis of an Internal Combustion Engine Powered by Tire and Biomass Pyrolysis Oil

Computational Investigation of the Influence of Combustion Chamber Characteristics on a Heavy-Duty Ammonia Diesel Dual Fuel Engine

The effect of biogas and dimethyl ether on the thermal characteristics of a dual‐fuel diesel engine: A numerical study

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