Study on the combustion characteristics of a high compression ratio HCCI engine fueled with natural gas

Wang, Zhongshu; Du, Guizhi; Li, Zhijie; Wang, Xiaoyan; Wang, Dan

doi:10.1016/j.fuel.2019.115701

Cited by 35 publications

(13 citation statements)

References 39 publications

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“…In addition, the compression ratio is a low‐cost method to increase TDC temperatures and pressures, compared to increased inlet conditions that required an additional energy input. Thus, a realistically high compression ratio of 22:1 was chosen, similar to recent HCCI engine investigations, [ 49,50 ] and was not varied. In the present work, an effective compression ratio is assumed as the single‐zone model does not consider uncertainties due to crevices, blow‐by, or cold cylinder walls.…”

Section: Modelingmentioning

confidence: 99%

Pyrolysis of Methane and Ethane in a Compression–Expansion Process as a New Concept for Chemical Energy Storage: A Kinetic and Exergetic Investigation

Rudolph

Atakan

2021

Energy Tech

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The production of chemical energy carriers utilizing electrical energy from renewable sources is essential for the future energy system. A motored piston engine may be used as a reactor to convert mechanical to chemical energy by the pyrolysis of methane and ethane; this is analyzed here. The piston engine is modeled as a compression–expansion cycle with detailed chemical kinetics. The main products are hydrogen and high‐energy hydrocarbons such as acetylene, ethylene, and benzene. To reach the required high temperatures for conversion after compression, the educt is diluted with argon. The influence of the operating conditions (temperature, pressure, dilution) on the product gas composition, the stored exergy, and the ratio of exergy gain to work input (efficiency) is investigated. A conversion of >80% is predicted for an argon dilution of 93 mol% at inlet temperatures of 573 K (methane) and 473 K (ethane), respectively. A storage power of 7.5 kW (methane) and 6 kW (ethane) for a 400 ccm four‐stroke single‐cylinder is predicted with an efficiency of 75% (methane) and 70% (ethane), respectively. Conditions are identified, where high yields of the target species are achieved, and soot formation can be avoided.

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Section: Modelingmentioning

confidence: 99%

Pyrolysis of Methane and Ethane in a Compression–Expansion Process as a New Concept for Chemical Energy Storage: A Kinetic and Exergetic Investigation

Rudolph

Atakan

2021

Energy Tech

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“…At the same time, locally rich mixture areas occurs due to the heteregoneous mixture in the combustion chamber and HC and smoke generate. Homogenous charge compression ignition (HCCI) engines have high efficiency due to high compressions ratio and a shorter combustion duration and ultra low NOx emissions owing to low combustion temperatures [2][3][4][5][6]. Furthermore, HCCI engines have less soot and particulate matter than SI and diesel engines because lean and homogenous air/fuel mixture is taken into the cylinder [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Combustion, performance and emission caracteristics of a HCCI engine fuelled with n-butanol/n-heptane blends

Aydoğan

Calam

2020

International Journal of Automotive Engineering and Technologies

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Published by Editorial Board Members of IJAET © This article is distributed by Turk Journal Park System under the CC 4.0 terms and conditions.Homegeneous charge compression ignition (HCCI) combustion can achieve very low NOx and soot emissions but knocking and misfiring restrict the operating range of this kind of engines. In this work, n-butanol which has low reactivity and high volatility blended with n-heptane that choosen as reference fuel in this study with various rates (25 vol% and 50 vol%). The experiments performed at various engine speeds (800-1800) and lambda (λ=1.6-2.95) at full load and 60 o C inlet air temperature. the parameters such as in-cylinder pressure, heat release rate, CA10, ringing intensity, thermal efficiency, brake torque, power output, specific fuel consumption, and HC and CO emissions were determined. The results showed that both in-cylinder pressure and heat release rate decreased with increasing lambda. Increasing amount of n-butanol in the charge mixture resulted a decrease both in-cylinder pressure and heat release rate. nbutanol also provided retarded combustion phasing and increased CA10. Ringing intensity decreased with increasing both lambda and n-butanol content in the mixture. Thermal efficiency increased with n-butanol. HC and CO emissions increased with increasing lambda. HC and CO emissions increased with increasing amount of n-butanol in the charge mixture. Operating range of HCCI engine was expanded with n-butanol in both knocking and misfiring zones.

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Section: Introductionmentioning

confidence: 99%

“…Alternative fuels also provide solutions to an array of environmental and economic problems. Alternative fuels, including biofuels and gaseous fuels such as methanol, natural gas (NG), and hydrogen, show potential to reduce emissions and fuel consumption and therefore have been studied and widely used. − Besides, alternative fuels can reduce dependence on imported oil and enhance national energy security. , Among alternative gaseous fuels, NG is regarded as the most promising for ICE because of its clean combustion, competitive pricing, varied sources, and large reserves. , …”

Section: Introductionmentioning

confidence: 99%

“…1−3 Besides, alternative fuels can reduce dependence on imported oil and enhance national energy security. 4,5 Among alternative gaseous fuels, NG is regarded as the most promising for ICE because of its clean combustion, competitive pricing, varied sources, and large reserves. 6,7 NG can be burned in spark ignition (SI) engines as a homogeneous NG−air mixture, taking advantage of the excellent knock-resisting properties of methane without utilizing a complex fuel injection system.…”

Section: Introductionmentioning

confidence: 99%

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Study on the Effects of EGR and Spark Timing on the Combustion, Performance, and Emissions of a Stoichiometric Natural Gas Engine

et al. 2020

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This paper involved conducting an experimental investigation on the effects of exhaust gas recirculation (EGR) and spark timing on the combustion, performance, and emission characteristics of a China-VI heavy-duty, natural gas engine fueled with high-methane content. The results showed that increasing the EGR rate extends the spark timing range and slows the combustion. This then increases ignition delay, prolongs combustion duration, and decreases heat release rate. Peak in-cylinder pressure (PCP) and indicated thermal efficiency (ITE) initially increase because of higher boost pressure with increasing EGR rate. However, as EGR rate increases further, PCP and ITE begin to decrease because of the deviation of combustion phasing. Lower in-cylinder temperature caused by higher EGR rate may cause nitrogen oxide (NOx) emissions to reduce significantly, while total hydrocarbon (THC) and carbon monoxide (CO) emissions increase, and THC emissions could increase exponentially at high EGR rates. In-cylinder pressure, temperature, and heat release rate increase with early spark timing, but the rate of increase is reduced at higher engine speeds. Early spark timing causes THC and CO emissions to increase at part-load conditions, whereas there is little change at full-load conditions. NOx emissions also increase with early spark timing because of the higher in-cylinder temperature.

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Study on the combustion characteristics of a high compression ratio HCCI engine fueled with natural gas

Cited by 35 publications

References 39 publications

Pyrolysis of Methane and Ethane in a Compression–Expansion Process as a New Concept for Chemical Energy Storage: A Kinetic and Exergetic Investigation

Pyrolysis of Methane and Ethane in a Compression–Expansion Process as a New Concept for Chemical Energy Storage: A Kinetic and Exergetic Investigation

Combustion, performance and emission caracteristics of a HCCI engine fuelled with n-butanol/n-heptane blends

Study on the Effects of EGR and Spark Timing on the Combustion, Performance, and Emissions of a Stoichiometric Natural Gas Engine

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