Various effects of reformer gas enrichment on natural-gas, iso-octane and normal-heptane HCCI combustion using artificial inert species method

Reyhanian, Masoud; Hosseini, Vahid

doi:10.1016/j.enconman.2017.12.074

Cited by 21 publications

(3 citation statements)

References 52 publications

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“…Bahlouli et al presented an optimized chemical kinetic mechanism for an n -heptane–NG blend used in a homogeneous charge compression ignition (HCCI) engine. Similarly, in order to solve the problem of HCCI engine combustion timing control, Reyhanian and Hosseini published a comprehensive chemical reaction mechanism for a natural gas, n -heptane, and iso-octane blend. The developed model was validated for mentioned fuels at various percentages of syngas using a single-cylinder engine, and the results showed that increasing the syngas fraction in the fuel mixture advanced the combustion time of natural gas fuel, retarded the combustion of n -heptane, and had little effect on iso-octane combustion.…”

Section: Comprehensive Mechanisms Employed For Natural Gas Enginesmentioning

confidence: 99%

Development of Natural Gas Chemical Kinetic Mechanisms and Application in Engines: A Review

Wei

et al. 2021

ACS Omega

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In this paper, the brief development of chemical kinetic modeling of natural gas is discussed, with emphasis on the development of chemical kinetic mechanisms describing fuel oxidation. The addition of ethane and/or propane to natural gas not only decreases the ignition delay times but also increases flame speeds. Thus, the mixture of methane, ethane, and propane rather than bare methane obtains more accurate predictions for the combustion and emission characteristics of natural gas. This paper also evaluates different comprehensive mechanisms employed for natural gas engines and pointed out their advantages and disadvantages, giving guidance for the selection of mechanisms during the development of natural gas engines.

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Section: Comprehensive Mechanisms Employed For Natural Gas Enginesmentioning

confidence: 99%

Development of Natural Gas Chemical Kinetic Mechanisms and Application in Engines: A Review

Wei

et al. 2021

ACS Omega

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“…The thermal, chemical and dilution effects of H 2 can be calculated similar to CO. Artificial inert species method is previously used for calculation of different effects of various additives [28,[32][33][34].…”

Section: Different Effects Of Rg On Availability Termsmentioning

confidence: 99%

Investigation on the effect of reformer gas on availability terms and waste heat recovery from exhaust gases of an HCCI engine considering radiation heat transfer

Neshat

Asghari

2019

J Braz. Soc. Mech. Sci. Eng.

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The main purpose of the current study is to investigate the different effects of reformer gas on different availability terms and the capacity of waste heat recovery from a homogeneous charge compression ignition engine. A validated multizone model is utilized for HCCI engine simulation. Mass transfer and conductive heat transfer are considered between zones, and convection and radiation are considered between near-wall zone and combustion chamber walls. Four different percentages of reformer gas (0-30%) are added to main fuel, and its effects on the different availability terms are discussed. Thermomechanical availability, chemical availability, availability of work, availability loss due to convection heat transfer, availability loss due to radiation heat transfer and irreversibility are calculated. Thermal, dilution and chemical effects of reformer gas are computed separately. The results indicated that by reformer gas addition to main fuel, inlet chemical availability and availability of work reduce. Heat loss availability reduces by reformer gas addition. Irreversibility decreases by reformer gas addition and second law efficiency increases slightly. The total utilization efficiency of HCCI engines increases by reformer gas addition. The results showed that the dilution effect of RG on availability terms is more significant than its chemical and thermal effects. The dilution effect reduces both engine-produced work and second law efficiency.

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“…The analysis based on the second law of thermodynamics is found to be also beneficial in controlling the irreversibility and heat transfer losses of the engine. By studying the effect of syngas addition on isooctane and n -heptane fuels in HCCI engines, Reyhanian and Hosseini 25 constructed a corresponding chemical kinetic model and found that the addition of syngas has a more significant chemical effect on n -heptane than on isooctane. Recent study came from Khan et al 26 They investigated the effect of H 2 , CO, and syngas addition on Haltermann gasoline.…”

Section: Introductionmentioning

confidence: 99%

Effects of Syngas Addition on Combustion Characteristics of Gasoline Surrogate Fuel

2023

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Syngas has the potential to become an alternative fuel for internal combustion engines. In this work, a detailed mechanism containing 1389 species and 5942 reactions was developed to examine the combustion of syngas/gasoline blends. The influence of syngas addition on the ignition delay time (IDT) and laminar flame speed of gasoline fuel was studied. Two influencing factors were considered: the mixing ratio of syngas and the H 2 /CO ratio in syngas. The changes in heat release, free radical concentrations, and emissions were also studied. Syngas can boost the system's reaction activity and promote ignition in the hightemperature area over 1000 K. However, the diluting effect is visible at low temperatures below 1000 K, leading to an IDT lag. The effect of the H 2 /CO ratio on the IDT was not as pronounced as expected. The addition of syngas can inhibit the knock combustion of the engine to a certain extent, but it will also lead to a violent exothermic process and a decrease in the total release of heat. Syngas addition increases the concentration of small molecule radicals and promotes the laminar flame speed. At higher temperatures and pressure levels, the trend of syngas/gasoline laminar flame speed is more dependent on changes in OH radical concentrations. The addition of syngas favors the promotion of complete combustion and the reduction of HC emissions but also results in an additional increase in CO. Combustion at lower temperatures has lower CO and HC emissions.

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Various effects of reformer gas enrichment on natural-gas, iso-octane and normal-heptane HCCI combustion using artificial inert species method

Cited by 21 publications

References 52 publications

Development of Natural Gas Chemical Kinetic Mechanisms and Application in Engines: A Review

Development of Natural Gas Chemical Kinetic Mechanisms and Application in Engines: A Review

Investigation on the effect of reformer gas on availability terms and waste heat recovery from exhaust gases of an HCCI engine considering radiation heat transfer

Effects of Syngas Addition on Combustion Characteristics of Gasoline Surrogate Fuel

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