The effect of hydrogen on the thermal efficiency and combustion process of the low compression ratio CI engine

Yılmaz, İlker Turgut

doi:10.1016/j.applthermaleng.2021.117381

Cited by 33 publications

(5 citation statements)

References 40 publications

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“…The introduction of hydrogen in WPO blends results in a noteworthy reduction in BSFC, particularly with WPO10+4H₂ at 25°CA bTDC, showing 10.5% and 8.1% lower BSFC, respectively, at full load. Hydrogen enrichment enhances combustion efficiency, reducing fuel consumption, while WPO blends exhibit higher BSFC due to increased viscosity and reduced heating value compared to diesel [12].…”

Section: Resultsmentioning

confidence: 99%

Influence of Fuel Injection Timing and Hydrogen Enrichment on Waste Plastic Oil: Performance, Combustion, and Emissions Analysis

Anand,

Debbarma

2024

DDF

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The escalating global demand for fossil fuels, coupled with geopolitical uncertainties, underscores the imperative for alternative fuels in internal combustion engines. Simultaneously, the pressing issue of plastic waste disposal necessitates sustainable solutions. This research delves into the impact of hydrogen enrichment on a CRDI-diesel engine using diesel and waste plastic oil, varying fuel injection timing (23, 25, and 27) °CA bTDC at 400 bar fuel injection pressure. The addition of hydrogen at 4 lpm improves Brake Thermal Efficiency (BTE) and lowers Brake Specific Fuel Consumption (BSFC), resulting in reduced hydrocarbons (HC) and carbon monoxide (CO) emissions, though Exhaust Gas Temperature (EGT) and NOx emissions increase. The WPO10+4H2 blend at 25 °CA bTDC demonstrates an 8.7% BTE increase, a 10.5% BSFC reduction at full load, and substantial decreases in HC and CO emissions compared to diesel. Despite these advantages, NOx emissions increase by 8% compared to pure diesel. Hydrogen integration in CRDI engines enhances performance and addresses sustainability, while waste plastic oil in diesel engines repurposes plastic waste, reduces fossil fuel dependency, and supports a circular economy with energy recovery.

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Section: Resultsmentioning

confidence: 99%

Influence of Fuel Injection Timing and Hydrogen Enrichment on Waste Plastic Oil: Performance, Combustion, and Emissions Analysis

Anand,

Debbarma

2024

DDF

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“…In both studies, a maximum reduction of 43% in NO x emissions was achieved. Similarly to WI, CR reduction resulted in a decrease in the maximum temperature within the combustion chamber, ultimately leading to a reduction in NO x emissions [97,99,102,[106][107][108][109][110].…”

Section: Effect Of Compression Rate Reductionmentioning

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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“…The induction of hydrogen to the intake manifold of the CI engine operating on karanja oil and rice bran biodiesel boosted brake thermal efficiency, 18,19 and also, it is observed that raising the intake manifold hydrogen produced enhanced brake thermal efficiency 20,21 whereas it is found lower thermal efficiency in premixed combustion because hydrogen depletes oxygen reserves and makes diffusion combustion problematic. 22 Biofuel has oxygen, which enhances performance, but its lower heating value causes a fast temperature decrease during combustion, which distorts the heat release rate (HRR) curve. Hydrogen induction in the intake manifold raises BTE for all mixes.…”

Section: Brake Thermal Efficiencymentioning

confidence: 99%

Hydrogen influence on kapok methyl ester blended with DEE as an alternate fuel in CI engine

Udayakumar

Kasiraman

2023

Proceedings of the Institution of Mechanical Engineers, Part E:

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Kapok oil methyl ester (KOME) is used as a pilot fuel, while hydrogen and diethyl ether (DEE) are used as secondary fuels to improve the performance, emissions and combustion of a direct injection compression ignition engine. With a compression ignition engine, a slight modification to the system enables hydrogen gas through the intake manifold. A flow metre limits the quantity of energy the hydrogen may produce off, and two flame arresters prevent backfires in the fuel line. At full load and maximum hydrogen energy sharing, KOME + 20%DEE obtained a brake thermal efficiency of 30.31%, which is 14% higher than without hydrogen enrichment and about 8% higher than diesel's value (0% hydrogen energy share). The main problem with previous research is that hydrogen with a high heating value makes greater amounts of nitric oxide. Diethyl ether, on the other hand, has fixed this major problem, and the absence of carbon in hydrogen fuel lowers CO, HC and smoke emissions.

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The effect of hydrogen on the thermal efficiency and combustion process of the low compression ratio CI engine

Cited by 33 publications

References 40 publications

Influence of Fuel Injection Timing and Hydrogen Enrichment on Waste Plastic Oil: Performance, Combustion, and Emissions Analysis

Influence of Fuel Injection Timing and Hydrogen Enrichment on Waste Plastic Oil: Performance, Combustion, and Emissions Analysis

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

Hydrogen influence on kapok methyl ester blended with DEE as an alternate fuel in CI engine

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