Methane Emissions Evaluation on Natural Gas/Diesel Dual-Fuel Engine during Scavenging Process

Felayati, Frengki Mohamad; Semin, Semin; Cahyono, Beny

doi:10.1088/1755-1315/698/1/012036

Cited by 3 publications

(4 citation statements)

References 12 publications

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“…Besides, the data shows that there are other factors that affect the natural gas mass trapped in the combustion chamber due to non-linear curves made. It is possibly due to the part of natural gas fuel being trapped in the intake port as described by Felayati et al [19]. Thus, the PES slightly decreased at a very long injection duration.…”

Section: Effect Of Injection Strategies On Low Loadmentioning

confidence: 84%

“…Advancing the injection timing means the longer time natural gas has to enter the combustion chamber. Thus, the natural gas/air mixed more homogeneously with advancing injection timing [19]. It caused the natural gas concentration to lower with advancing the injection timing.…”

Section: Effect Of Injection Strategies On High Loadmentioning

confidence: 99%

“…It means that advancing the injection timing of natural gas prolongs the natural gas/air mixture duration in the intake port [21]. The well-mixed natural gas/air leads to lower mixture stratification thus decreasing the combustion quality [19]. As a result, the ITE decreases as advancing the natural gas injection timing.…”

Section: Figure 2 Effect Of Injection Timing and Duration On Pes And ...mentioning

confidence: 99%

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Study on Natural Gas/Diesel Dual-fuel Engine Energy Ratio: Effect of Natural Gas Injection Parameters

Felayati

Dwisetiono

Prasutiyon

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Natural gas has been a promising demand for several years in Indonesia as a fuel for a diesel engine by converted into a natural gas/diesel dual-fuel engine. However, determining the energy ratio of the diesel and natural gas fuel is important due to the engine performance and emissions which affect the engine safety operation. This study presents the method to determine the natural gas and diesel fuel energy ratio on intake port natural gas injection mode through experiment. A direct injection diesel engine is converted to a natural gas/diesel dual-fuel engine by injecting natural gas into the intake port. The diesel injection parameters are unmodified for the experiment; besides the natural gas injection variations are studied to determine the energy ratio. Moreover, the engine is tested for low to high load conditions. However, natural gas injection duration, pressure, and injection timing variation affect the fuel energy ratio and indicated thermal efficiency (ITE). At low load, the optimum fuel energy ratio and ITE are achieved at a long injection duration (10 ms) and with advanced injection timing. Moreover, at high load, the optimum fuel energy ratio and ITE is achieved at high natural gas injection duration (12 ms), high injection pressure (3 bar), and advancing the injection timing.

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Section: Effect Of Injection Strategies On Low Loadmentioning

confidence: 84%

Section: Effect Of Injection Strategies On High Loadmentioning

confidence: 99%

Section: Figure 2 Effect Of Injection Timing and Duration On Pes And ...mentioning

confidence: 99%

See 1 more Smart Citation

Study on Natural Gas/Diesel Dual-fuel Engine Energy Ratio: Effect of Natural Gas Injection Parameters

Felayati

Dwisetiono

Prasutiyon

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…The benefits of using LNG can only be felt after 100 years of use, and even then, only 15% when compared to MGO. Moreover, Felayati et al 80) mentioned that detecting methane emissions in the exhaust port reveals that these emissions decrease during the scavenging process. The fraction of methane emissions during scavenging is significantly smaller compared to the overall concentration of total HC emissions in the experimental results.…”

Section: Environmental Problem Of High Methane Slipmentioning

confidence: 99%

Critical Overview and Challenge of Representative LNG-Fuelled Ships on Potential GHG Emission Reduction

Dian Purnama Sari,

Tuswan,

Muttaqie

et al. 2023

Evergreen

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International cargo transportation is largely dominated by shipping, and it is a crucial aspect. To minimize the negative impact on the environment, ships are expected to abide by strict regulations concerning greenhouse gas emissions. Many shipping companies are turning to Liquefied Natural Gas (LNG) as a primary alternative fuel to reduce these emissions. This is because LNG has been found to have cleaner emissions than traditional fossil fuels. There have been several studies conducted to explore ways to implement LNG as a ship fuel effectively, but there is a lack of research on the specific reduction of greenhouse gas (GHG) emissions from using LNG. This report provides a comprehensive analysis of the current state of LNG-powered ship development, including current applications, initiatives by the International Maritime Organization, existing challenges, and potential measures for reducing GHG emissions. According to measurements compared to conventional ship fuel, NOx, SOx, and PM10 emission factors have a high potential for GHG emission reduction. The global fleet of LNG-powered vessels is expected to expand in the future. The LNG-fuelled ship mainly operates in the emission control area. The essential concerns for future research should be involved regarding the environmental issue of significant methane slip, geopolitical impact, and risk of LNG bunkering.

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Performance and carbon emissions of a diesel/oxy-hydrogen dual-fuel engine with oxy-hydrogen injection variation under low and medium load conditions

Felayati,

Prasutiyon,

Janah

et al. 2024

Int. J. Renew. Energy Dev.

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Reducing carbon emissions such as carbon dioxide (CO2) and carbon monoxide (CO) from diesel engines struggled with engine performance challenges and fossil fuel limitations. Besides, huge transportation such as ships hardly replaced diesel engines due to the higher thermal efficiency and low operation cost. Oxy-hydrogen gas, as a carbon-free gas, could potentially improve diesel engine performance and carbon emissions. Most of the studies tried to identify the effect of oxy-hydrogen induction into diesel engine combustion on performance and emissions. However, this study evaluated oxy-hydrogen injector sizes to the diesel engine performance and carbon emissions at several loads and several engine speed conditions. Overall, the result showed that the oxy-hydrogen gas injection into the diesel engine’s intake port improved the performance and carbon emissions compared to the single diesel fuel as a baseline. High engine performance with low carbon emissions could be achieved at low and medium engine load conditions with high engine speeds. Moreover, smaller oxy-hydrogen injector sizes were suitable for the medium engine load and vice versa, to improve the performance and carbon emissions. At low load, the engine performance improvement of engine torque, specific fuel consumption, and thermal efficiency were 1800 to 2200 rpm. Moreover, the CO2 and CO emissions reductions were also suitable with 2200 rpm with a bigger oxy-hydrogen gas injector (6 mm). Furthermore, at medium load, the engine performance improved at 1400 rpm but the CO2 and CO emissions were lower at 2200 rpm with a small oxy-hydrogen gas injector (4 mm). The engine operation at 2200 rpm with a 4 mm injector also improved the engine performance regarding carbon emissions reduction. However, injecting oxy-hydrogen gas into diesel engines had the potential to enhance the engine performance and reduce carbon emissions, moving closer to achieving zero emissions

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Methane Emissions Evaluation on Natural Gas/Diesel Dual-Fuel Engine during Scavenging Process

Cited by 3 publications

References 12 publications

Study on Natural Gas/Diesel Dual-fuel Engine Energy Ratio: Effect of Natural Gas Injection Parameters

Study on Natural Gas/Diesel Dual-fuel Engine Energy Ratio: Effect of Natural Gas Injection Parameters

Critical Overview and Challenge of Representative LNG-Fuelled Ships on Potential GHG Emission Reduction

Performance and carbon emissions of a diesel/oxy-hydrogen dual-fuel engine with oxy-hydrogen injection variation under low and medium load conditions

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