Effect of hydrogen peroxide addition to methane fueled homogeneous charge compression ignition engines through numerical simulations

Hammond, Zachary M.; Mack, J. Hunter; Dibble, Robert W.

doi:10.1177/1468087414564230

Cited by 12 publications

(8 citation statements)

References 33 publications

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“…While a detailed estimate of the thermal efficiency is not the aim of this study, it is generally accepted that zero-dimensional modelling as that used in this study yields reasonable accuracy in estimating ignition. 28 Practical diesel engine break efficiency including frictional losses is currently around 53%. Practical applications of HCCI combustion do not exist for large marine diesel engines due to problems related to reliably controlling ignition and limiting heat release and pressure rise rates.…”

Section: Homogeneous Charge Compression Ignition Cycle Resultsmentioning

confidence: 99%

Aqueous solution of ammonia as marine fuel

Schönborn

2020

Proceedings of the Institution of Mechanical Engineers, Part M:

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The ignition of ammonia in aqueous solution was simulated in a two-stroke compression ignition engine model. Zero-dimensional chemical kinetic calculations were used to estimate the ignition timing of fuel air mixtures in homogeneous charge compression ignition and diesel combustion modes. The fuel consisted of a 25% m/m aqueous solution of ammonia and pure ammonia for comparison. Ignition was studied by varying the geometric compression ratio of the engine. To ignite ammonia in aqueous solution a minimum compression ratio of 25 was necessary under homogeneous charge compression ignition combustion conditions, whereas under diesel combustion conditions a minimum compression ratio of 27 was required. Ammonia containing ammonium nitrite or hydrogen were two potential ammonia derivatives that were shown to enhance aqueous ammonia ignition in the simulations, and allowed ignition to take place at a compression ratio of 24 for diesel combustion. When comparing the ignition of aqueous ammonia solution to pure ammonia, the minimum compression ratio necessary to ignite pure ammonia was approximately 24.8 and that for aqueous ammonia 26.7 in diesel combustion. This led to the conclusion that aqueous ammonia is not prohibitively more difficult to ignite than pure ammonia. Ammonia containing ammonium nitrite or hydrogen were found to be potential pilot fuels.

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Section: Homogeneous Charge Compression Ignition Cycle Resultsmentioning

confidence: 99%

Aqueous solution of ammonia as marine fuel

Schönborn

2020

Proceedings of the Institution of Mechanical Engineers, Part M:

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“…The main purpose of the single-zone model is to discriminate between differences in ignition delay. It is known that while single-zone reaction models are suitable for ignition studies, 15 they underestimate heat transfer and overestimate combustion heat release and engine efficiency. Another result of using a single-zone model is that cylinder pressure is simulated to rise very sharply.…”

Section: Resultsmentioning

confidence: 99%

Autoignition Control of Fuel and Air Mixtures Using Photochemical Isomerization

Schönborn

2018

Energy Fuels

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Autoignition control of fuel and air mixtures via photochemical isomerization was simulated using chemical kinetic calculations for the ignition of 1,3-cyclohexadiene diluted in n-pentane. The calculations showed that ignition in a homogeneous charge compression ignition engine may be controlled if the fuel is photochemically isomerized using light irradiation prior to the combustion process. The calculations illustrate how photochemical reactions may be applied to fuels, to control the combustion process in engines. The theoretical energy required to achieve the photochemical conversion, based on the quantum conversion, constitutes 0.3% of the fuel energy, which may be offset by increased engine efficiency resulting from ignition timing control.

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“…Finally, Hammound et al [13] concluded that hydrogen addition with a small fraction to CH4 fueled HCCI engine has a significant effect on the combustion phasing and can be a controlling parameter that maintain low emissions and peak cylinder pressure.…”

Section: Review Of Literaturementioning

confidence: 99%

Influence of hydrogen as a fuel additive on combustion and emissions characteristics of a free piston engine

et al. 2020

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It has been shown that using fuel additives play an important role in enhancing the combustion characteristics in terms of efficiency and emissions. In addition, free piston engines have shown capable in reducing energy losses and presenting more efficient and reliable engines. In this context, the objective of the present work is to investigate the effect of using hydrogen as a fuel additive in natural gas homogeneous charge compression ignition free piston engine. To this aim, two models have been iteratively coupled: the combustion model that is used to calculate the heat release of the combustion and the scavenging model that is employed to determine the in-cylinder mixture state after scavenging in terms of its homogeneity and species mass fractions and to obtain the finial pressure and temperature of the in-cylinder mixture. In the former model, the 0-D approach through Cantera toolkit has been considered due to the fact that homogeneous charge compression ignition combustion is very rapid and the fuel-air mixture is well-homogenous, whereas in the latter model, 3-D-CFD approach through AN-SYS FLUENT software is considered to ensure precise calculations of the species exchange at the end of each engine cycle. The effect of hydrogen as a fuel additive has been quantified in terms of the combustion characteristics (e. g., ignition delay, heat release rate, engine overall efficiency and emissions, etc.). It has been shown that hydrogen addition reduces ignition delay time, decreases the incylinder peak pressure, while allowing the engine to operate with higher mechanical efficiency as it has high heat release rate, increases the NOx emission levels of the engine, but decreases the CO levels

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Effect of hydrogen peroxide addition to methane fueled homogeneous charge compression ignition engines through numerical simulations

Cited by 12 publications

References 33 publications

Aqueous solution of ammonia as marine fuel

Aqueous solution of ammonia as marine fuel

Autoignition Control of Fuel and Air Mixtures Using Photochemical Isomerization

Influence of hydrogen as a fuel additive on combustion and emissions characteristics of a free piston engine

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