Reactivity-Controlled Compression Ignition Combustion Using Alcohols

Singh, Akhilendra Pratap; Sharma, Nikhil; Satsangi, Dev Prakash; Kumar, Vikram; Ágarwal, Avinash Kumar

doi:10.1007/978-981-13-3275-3_2

Cited by 8 publications

(4 citation statements)

References 40 publications

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“…Ignition delay, defined as the time interval between the start of fuel injection and the start of combustion [6,7,25,26], can be determined by several methods: flame position, first and second pressure derivative, apparent heat released or logarithmic pressure-volume curve (log P-log V) [27,28]. In this work, ignition delay was determined by the logarithmic curve method.…”

Section: Methodsmentioning

confidence: 99%

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Reactivity-controlled compression ignition (RCCI) with double direct injection of diesel and hydrous ethanol

Teixeira

Braga

Sánchez

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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Oil is still a relevant component in the global energy matrix. However, price fluctuations, irregular production and possible shortage of oil are factors that negatively affect the world economy. Moreover, it is universal unanimity that the exploitation of oil and its derivatives causes setbacks to the environment and diminishes the population life quality. Therefore, there are studies to find natural energy sources to replace petroleum products to reduce the harmful effects caused by fossil fuels. In this work, sugarcane ethanol, widely used to supply passenger cars in Brazil, was the fuel chosen as a possible candidate for diesel replacement, even partially. To conduct the study, a reactive charge compression ignition engine fueled with diesel and ethanol was used to compare two directed injection modes: ethanol and diesel (ED) strategy (ethanol and diesel injected before top dead center (TDC)) and diesel and ethanol (DE) strategy (diesel injected before TDC and ethanol injected after TDC). In all tests in which ethanol was injected, increased ignition delay was observed. The highest efficiency was achieved using the ED injection strategy, but detonations and pressure peaks appeared. Test results also show that, using DE injection strategy, it was possible to increase the amount of ethanol injected, since no pressure peaks nor detonations appeared; however, it presented lower efficiency compared to the ED injection strategy.

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Section: Methodsmentioning

confidence: 99%

“…The higher the CN of a fuel, the greater its reactivity [5]. RCCI technology has been applied in several studies to find an alternative fuel for diesel, such as compressed natural gas (CNG), gasoline and ethanol [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Reactivity-controlled compression ignition (RCCI) with double direct injection of diesel and hydrous ethanol

Teixeira

Braga

Sánchez

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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show abstract

“…Unfortunately, alcohol blending with mineral diesel cannot eliminate NOx–PM trade-off issue of the conventional diesel combustion. 11 Therefore, it becomes necessary to explore new, advanced combustion concepts such as low temperature combustion (LTC) that can be applied to all segments of IC engines without NOx–PM trade-off, and has potential to be fuelled by alternative fuels. 12…”

Section: Introductionmentioning

confidence: 99%

“…Very limited experimental studies are available in the open literature, in which detailed PM emission characteristics of RCCI combustion have been reported. 11,12,19,30 In this study, RCCI combustion investigations were carried out using methanol as the LRF and mineral diesel as the HRF. Previous studies exhibited that the amount of LRF depends on the engine load; therefore, this study aims to explore the maximum limit of energy replacement of HRF using LRF at varying engine loads.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations of mineral diesel/methanol-fueled reactivity controlled compression ignition engine operated at variable engine loads and premixed ratios

Singh

Sharma

Kumar

et al. 2020

International Journal of Engine Research

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Global warming and stringent emission norms have become the major concerns for the road transport sector globally, which has motivated researchers to explore advanced combustion technologies. Reactivity controlled compression ignition combustion technology has shown great potential to resolve these issues and deliver high brake thermal efficiency and emit ultra-low emissions of oxides of nitrogen and particulate simultaneously. In this experimental study, baseline compression ignition combustion mode and reactivity controlled compression ignition combustion mode experiments were performed in a single-cylinder research engine using mineral diesel as high-reactivity fuel and methanol as low-reactivity fuel. All experiments were carried out at constant engine speed at four engine loads (brake mean effective pressure: 1–4 bar). For efficient combustion and lower emissions, four premixed ratios ( rp = 0, 0.25, 0.50, and 0.75) were tested to assess optimized premixed ratio at different engine loads. In these experiments, primary and secondary fuel injection parameters were maintained identical. Combustion results showed that reactivity controlled compression ignition combustion was more stable compared to compression ignition combustion and resulted in lesser knocking. Reactivity controlled compression ignition combustion delivered higher brake thermal efficiency and lower exhaust gas temperature and oxides of nitrogen emissions, especially at maximum engine loads. Addition of methanol as secondary fuel reduced particulate emissions. Particulate analyses depicted that reactivity controlled compression ignition combustion mode emitted significantly lower accumulation mode particles; however, emission of nucleation mode particles was slightly higher. A significant reduction in particulate mass emitted from reactivity controlled compression ignition combustion was another important finding of this study. Particulate number–mass distributions showed that increasing the premixed ratio of methanol led to a dominant reduction in particulate number concentration compared to particulate mass. Analysis for critical performance and emission characteristics suggested that optimization of the premixed ratio of methanol at each engine load should be done in order to achieve the best results in reactivity controlled compression ignition combustion mode.

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Efficiency Improvement of Internal Combustion Engines Over Time

Baweja

Kumar

2021

Energy, Environment, and Sustainability

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Reactivity-Controlled Compression Ignition Combustion Using Alcohols

Cited by 8 publications

References 40 publications

Reactivity-controlled compression ignition (RCCI) with double direct injection of diesel and hydrous ethanol

Reactivity-controlled compression ignition (RCCI) with double direct injection of diesel and hydrous ethanol

Experimental investigations of mineral diesel/methanol-fueled reactivity controlled compression ignition engine operated at variable engine loads and premixed ratios

Efficiency Improvement of Internal Combustion Engines Over Time

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