Effects of hydrogen enrichment on combustion characteristics of a CI engine

Yılmaz, İlker Turgut; Demir, Abdullah; Gümüş, Metin

doi:10.1016/j.ijhydene.2017.01.214

Cited by 54 publications

(10 citation statements)

References 26 publications

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“…4a, b was that the peak CP was improved at a higher compression ratio and higher load. The reason was due to rapid flame propagation which was on account of higher in-cylinder pressure and temperature at higher compression ratios [12,21]. Further, an increase in the hydrogen flow rate was noticed superior CP irrespective of loads and compression ratios.…”

Section: Cylinder Pressure (Cp)mentioning

confidence: 96%

Comprehensive performance, combustion, emission, and vibration parameters assessment of diesel engine fuelled with a hybrid of niger seed oil biodiesel and hydrogen: response surface methodology approach

et al. 2020

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The present investigation centered on the application of response surface methodology to assess the engine operating parameters namely performance, combustion, emission, and vibration characteristics of variable compression ratio direct injection single-cylinder diesel engine operating with Niger seed oil methyl ester blend and hydrogen in dual fuel mode. Response surface models were developed using the experimental data of input and output variables. The fuel blend, load, compression ratio, and hydrogen flow rate were considered as input responses while the brake thermal efficiency, brake specific fuel consumption, cylinder pressure and net heat release rate, carbon monoxide (CO), unburnt hydrocarbon, Nitrogen oxides (NO x), smoke opacity, and RMS velocity respectively were considered as the output responses. The input conditions altered were: loads of 29.43 N (3 kgf), 58.86 N (6 kgf), 88.29 N (9 kgf), and 117.72 N (12 kgf), compression ratios of 16, 17.5, and 18.5, and the hydrogen flow rates of 5 lpm, 10 lpm, and 15 lpm. The output information of the test was assessed using response surface methodology (RSM) and the polynomial model (second-request) was created. The experimental values were in good match with RSM predicted values and maintained an R 2 value of more than 0.95 for all the test run combinations. Further, all the test points sustained comparatively within the 10% maximum deviation. Keywords Brake thermal efficiency • Compression ratio • Smoke opacity • Hydrogen • Cylinder pressure Abbreviations CR Compression ratio FB Fuel blend HFR Hydrogen flow rate (lpm) BTE Brake thermal efficiency (%) BSFC Brake specific fuel consumption (kg/kWhr) NSOME Niger seed oil methyl ester B20 20% NSOME in diesel CO Carbon monoxide (%) UHC Unburnt hydrocarbon (ppm) NOx Nitrogen oxides (ppm) CI Compression ignition ASTM American standards for testing materials ADC Analog to digital converter lpm Liter per minute CP Cylinder pressure (bar) NHRR Net heat release rate (J/deg.) q Net heat release rate (J/deg.) q Heat Heat transfer rate combustion chamber wall (J/deg.) V Volume change with crank angle (m 3 /deg.) p Pressure change with crank angle (bar/deg.)

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Section: Cylinder Pressure (Cp)mentioning

confidence: 96%

Comprehensive performance, combustion, emission, and vibration parameters assessment of diesel engine fuelled with a hybrid of niger seed oil biodiesel and hydrogen: response surface methodology approach

et al. 2020

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“…Similar results were obtained by Lata et al [63] at 10%, 40%, and 80% loads with IDs of 4, 3, and 2 • CA, respectively. Yilmaz et al [46] reported a significant ID when introducing H 2 at 50 Nm (9 • CA with respect to the diesel fuel case). However, this delay was reduced as the engine load increased (by 3 • CA at 75 Nm and by a non-negligible amount at 100 Nm).…”

Section: Ignition Delaymentioning

confidence: 99%

“…m diesel fuel will be further reduced, thereby increasing the HES and keeping the previously established engine load. Yilmaz et al [46] conducted tests at three engine loads (50, 75, and 100 Nm) and two hydrogen volumetric flow rates (20 and 40 L/min). At 75 Nm, no H 2 injection resulted in a 0% HES, increasing up to 8.93% and 17.35%, with 20 and 40 L/min, respectively, while keeping constant the initial engine load.…”

Section: Hydrogen As Fuel In Compression Ignition Enginesmentioning

confidence: 99%

A Review of the Use of Hydrogen in Compression Ignition Engines with Dual-Fuel Technology and Techniques for Reducing NOx Emissions

Rueda-Vázquez,

Serrano,

Pinzi

et al. 2024

Sustainability

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The use of compression ignition engines (CIEs) is associated with increased greenhouse gas emissions. It is therefore necessary to research sustainable solutions and reduce the negative environmental impact of these engines. A widely studied alternative is the use of H2 in dual-fuel mode. This review has been developed to include the most recent studies on the subject to collect and compare their main conclusions on performance and emissions. Moreover, this study includes most relevant emission control strategies that have not been extensively analyzed in other reviews on the subject. The main conclusion drawn from the literature is the negative effect of the addition of H2 on NOx. This is due to the increase in temperature during combustion, which increases NOx formation, as the thermal mechanism predominates. Therefore, to reduce these emissions, three strategies have been studied, namely exhaust gas recirculation (EGR), water injection (WI), and compression ratio (CR) reduction. The effect of these techniques on NOx reduction, together with their effect on other analyzed performance parameters, have been deeply analyzed. The studies reviewed in this work indicate that hydrogen is an alternative fuel for CIEs when used in conjunction with techniques that have proven to be effective in reducing NOx.

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“…Table 4 shows a comparison of gasoline, diesel and hydrogen in some items [1,69,77,79]. Since hydrogen does not include any carbon content as gasoline and diesel fuels do, hydrogen powered engines do not give main ICE emissions such as Carbon Monoxide (CO) or Hydrocarbon (HC) [80][81]. Referring to Table 4, hydrogen has a high auto-ignition temperature when compared to gasoline and diesel fuels.…”

Section: Internal Combustion Engine Vehiclesmentioning

confidence: 99%

Sıvı hidrojenli taşıtlar için yardımcı bir klima sistemi

Uğurlu

2019

International Journal of Advances in Engineering and Pure Sciences

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Current Vehicle Air Conditioning (VAC) systems, which are operated by compressors driven by Internal Combustion Engines (ICEs) or batteries, increase the fuel consumption and emissions depending on the thermal load of the vehicle passenger cabin. Since decreasing the thermal load of the vehicle will decrease the fuel consumption and emissions, studies in this area is very important from the economic and environmental aspects. In this study, an Auxiliary Air Conditioning (AAC) system for Internal Combustion Engine Vehicles (ICEVs) or Fuel Cell Vehicles (FCVs) that store Liquid Hydrogen (LH 2) as a powering source has been proposed to make contribution to the works in this significant area. ICEVs were evaluated as Gasoline Equivalent Hydrogen Internal Combustion Engine Vehicles (GEHICEVs) and Diesel Equivalent Hydrogen Internal Combustion Engine Vehicles (DEHICEVs) considering their average fuel consumption rates according to the New European Driving Cycle (NEDC). According to the analyses, approximate hydrogen consumption values have been found that reach 0.7 g/s for GEHICEVs, 1.6 g/s for DEHICEVs, and 0.6 g/s for FCVs with maximum cooling rates of 326 W, 704 W, and 250 W, respectively.

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Effects of hydrogen enrichment on combustion characteristics of a CI engine

Cited by 54 publications

References 26 publications

Comprehensive performance, combustion, emission, and vibration parameters assessment of diesel engine fuelled with a hybrid of niger seed oil biodiesel and hydrogen: response surface methodology approach

Comprehensive performance, combustion, emission, and vibration parameters assessment of diesel engine fuelled with a hybrid of niger seed oil biodiesel and hydrogen: response surface methodology approach

A Review of the Use of Hydrogen in Compression Ignition Engines with Dual-Fuel Technology and Techniques for Reducing NOx Emissions

Sıvı hidrojenli taşıtlar için yardımcı bir klima sistemi

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