Combustion characteristics of biomethane–diesel dual-fueled CI engine with exhaust gas recirculation

Gaikwad, Machindra S.; Jadhav, Keshav M.; Kolekar, Avinash H.; Chitragar, Parashuram R.

doi:10.1080/17597269.2018.1479136

Cited by 10 publications

(7 citation statements)

References 58 publications

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“…It is critical to include AMR to capture important flow features without requiring unrealistically large cell counts. As mentioned before, nowadays, natural gas can be produced from various biomass feedstocks [15,16]; moreover, the process of converting biogas into biomethane can be industrialized [45]. Whether it is biomethane or natural gas from fossil energy, its main component is methane [15,16,45,46].…”

Section: Numerical Simulation Modelmentioning

confidence: 99%

“…In addition, the high-octane value and antiknock properties permit a high compress ratio, therefore achieving high thermal efficiency [13,14]. Moreover and more importantly, nowadays, natural gas can be produced from various biomass feedstocks [15,16], thus increasing its eco-friendly merits, with this gas called bio-methane, bio-compressed natural gas (CNG), or "green gas". Previous studies showed that natural gas engines could reduce NOx emissions by approximately 50-80% while producing almost zero soot emissions [17].…”

Section: Introductionmentioning

confidence: 99%

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An Investigation of the Influence of Gas Injection Rate Shape on High-Pressure Direct-Injection Natural Gas Marine Engines

Wang

Li³

et al. 2019

Energies

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High-pressure direct-injection (HPDI) natural gas marine engines are widely used because of their higher thermal efficiency and lower emissions. The effects of different injection rate shapes on the combustion and emission characteristics were studied to explore the appropriate gas injection rate shapes for a low-speed HPDI natural gas marine engine. A single-cylinder model was established and the CFD model was validated against experimental data from the literature; then, the combustion and emission characteristics of five different injection rate shapes were analyzed. The results showed that the peak values of in-cylinder pressure and heat release rate profiles of the triangle shape were highest due to the highest maximum injection rate, which occurred in a phase close to the top dead center. The shorter combustion duration of the triangle shape led to higher indicated mean effective pressure (IMEP) and NOx emissions compared with other shapes. The higher initial injection rates of the rectangle and slope shapes had a negative effect on the ignition delay periods of pilot fuel, which resulted in lower in-cylinder temperature and NOx emissions. However, due to the lower in-cylinder temperature, the engine power output was also lower. Otherwise, soot, unburned hydrocarbon (UHC), and CO emissions and indicated specific fuel consumption (ISFC) increased for both rectangle and slope shapes. The trapezoid and wedge shapes achieved a good balance between fuel consumption and emissions.

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Section: Numerical Simulation Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Investigation of the Influence of Gas Injection Rate Shape on High-Pressure Direct-Injection Natural Gas Marine Engines

Wang

Li³

et al. 2019

Energies

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“…Biogas that has been improved by removing hydrogen sulfide, moisture, and carbon dioxide is known as biomethane. Because of good combustion characteristics, biomethane can be used in internal combustion engines in order to reduce twin problems of energy crisis and environmental degradation [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…If the biogas is cleaned, it can be treated as biomethane which has better combustion properties as compared to biogas fuel. The calorific value of biogas fuel is within the range of 12-30 MJ/kg [3,11], whereas for biomethane which contains more percentage of methane (CH 4 ) has a lower heating value of about 33.7 MJ/kg [11]. Various technologies available for upgrading biogas to biomethane are absorption, adsorption, cryogenic separation, and membrane separation [6].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Spark Ignition Engine for Different Energy Shares of Biomethane

Jadhav

Gaikwad

Yadav

2021

Lecture Notes in Mechanical Engineering

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This is the alarming time to concentrate on renewable source of energy in the transportation sector. World is facing problem because of energy crisis and the augmented rate of environmental degradation. Biogas is naturally produced from the decomposition of organic matter and it has potential to run internal combustion engines. In this study, experimental investigation is carried out with Biomethanepetrol dual-fuel spark ignition engine. Experimental setup is developed in such a way that the spark ignition engine is working on gas-liquid dual-fuel mode. Experimentation is carried out by varying engine operating parameters like load, and energy shares of biomethane fuel to analyze the performance and emissions of the engine. Biomethane energy shares used are 70, 80, 90 and 100% of total energy developed by the engine. It is observed from experimental results that the engine shows better performance for 70% substitution of biomethane; however, it is lower than 100% petrol operation. It is also observed that maximum power developed by engine decreases as biomethane energy share increases.

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“…Since its key component is methane (more than 90%) it can also be produced synthetically. Moreover and more importantly, nowadays NG quality gas can be produced from various biomass feedstocks [17][18][19][20], hence increasing its eco-friendly merits, with this gas called bio-methane or biocompressed natural gas (CNG) or 'green gas'.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Air Oxygen Enrichment Effects on Combustion and Emissions of Natural Gas/Diesel Dual-Fuel Engines at Various Loads and Pilot Fuel Quantities

Papagiannakis

Rakopoulos

2018

Energies

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The use of natural gas (NG) as supplement of the normal diesel fuel in compression ignition (CI) environments (Natural Gas/Diesel Dual-Fuel, NG/DDF), seems to present an answer towards reducing soot or particulate matter (PM) and nitrogen oxides (NOx) emissions in existing and future diesel engine vehicles. The benefits for the environment can be even higher, as recently NG quality gas can be produced from biomass (bio-methane or bio-CNG or ‘green gas’). However, this engine type where the main fuel is the gaseous one and the diesel liquid fuel constitutes the ignition source (pilot), experiences higher specific energy consumption (SEC), carbon monoxide (CO), and unburned hydrocarbons (HC) emissions compared to the conventional (normal) diesel one, with these adverse effects becoming more apparent under partial load operation conditions. Apart from using bio-fuels as pilot fuel, it is anticipated that air oxygen enrichment—addition of oxygen in the intake air—can mitigate (at least partly) the associated negative results, by accelerating the burning rate and reducing the ignition delay. Therefore, the present work strives to investigate the effects of various degrees of oxygen enrichment on the combustion, performance, and emissions of such a NG/DDF engine, operated under various loads and pilot (diesel fuel) quantities. The study is carried out by using an in-house, comprehensive, computational model, which is a two-zone (phenomenological) one. The accuracy of the modeling results are tested by using related experimental data from the literature, acquired in an experimental investigation conducted on a naturally aspirated, light-duty, NG/DDF engine. The computational study is extended to include various pilot fuel quantities, attempting to identify the influence of the examined parameters and witness advantages and disadvantages. The study results demonstrate that the air oxygen enrichment reduces the specific energy consumption and CO emissions, by accelerating the burning rate and reducing the ignition delay (as revealed by the cylinder pressure and rate of heat release diagrams), without impairing seriously the soot and NO emissions. The conclusions of the specific investigation are much useful, particularly if wished to identify the optimum combination of the parameters under examination for improving the overall performance of existing CI engines functioning under natural gas/diesel fuel operating mode.

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Combustion characteristics of biomethane–diesel dual-fueled CI engine with exhaust gas recirculation

Cited by 10 publications

References 58 publications

An Investigation of the Influence of Gas Injection Rate Shape on High-Pressure Direct-Injection Natural Gas Marine Engines

An Investigation of the Influence of Gas Injection Rate Shape on High-Pressure Direct-Injection Natural Gas Marine Engines

Performance Analysis of Spark Ignition Engine for Different Energy Shares of Biomethane

Evaluation of the Air Oxygen Enrichment Effects on Combustion and Emissions of Natural Gas/Diesel Dual-Fuel Engines at Various Loads and Pilot Fuel Quantities

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