Combustion of different reactivity fuel mixture in a dual fuel engine

Tutak, Wojciech; Jamrozik, Arkadiusz; Gnatowska, Renata

doi:10.2298/tsci170606299t

Cited by 11 publications

(7 citation statements)

References 31 publications

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“…This is confirmed by the result of basic research carried out using specialized combustion chambers [15][16][17][18]. The authors of research papers using piston engines came to similar conclusions with basic research [9,11,19]. In the paper of Paul et al, regarding the investigation of blend combustion, authors presented results of investigation of diesel-ethanol combustion process in diesel engine.…”

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confidence: 52%

Comparative Analysis of Combustion Stability of Diesel/Ethanol Utilization by Blend and Dual Fuel

Tutak

Jamrozik

2019

Processes

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The aim of the work is a comparison of two combustion systems of fuels with different reactivity. The first is combustion of the fuel mixture and the second is combustion in a dual-fuel engine. Diesel fuel was burned with pure ethanol. Both methods of co-firing fuels have both advantages and disadvantages. Attention was paid to the combustion stability aspect determined by COV IMEP as well as the probability density function of IMEP. It was analyzed also the spread of the maximum pressure value, the angle of the position of maximum pressure. The influence of ethanol on ignition delay time spread and end of combustion process was evaluated. The experimental investigation was conducted on 1-cylinder air cooled compression ignition engine. The test engine operated with constant rpm equal to 1500 rpm and constant angle of start of diesel fuel injection. The engine was operated with ethanol up to 50% of its energy fraction.Processes 2019, 7, 946 2 of 10 opportunities to use alcohol-based fuels in compression ignition engines. In the works devoted to the combustion of fuels in the form of blends or dual fuel mode, reference is made to operating parameters of engine and emission standards fulfillment. Lee et al. presented results of investigation of a heavy-duty single-cylinder diesel engine with two direct injectors. Engine speed was fixed at 1000 rpm and the load condition varied for an indicated mean effective pressure ranging from 0.2 to 0.8 MPa. The ratio of ethanol to the total input energy was controlled from zero to nearly 50% of the input energy. The NO x and PM emissions decreased with increasing ethanol substitution and the mean size of the PM emissions decreased. For the mid-load condition, the substitution was increased to 63%; however, for low and high loads, higher ethanol fractions could not be used because of insufficient ignition energy at low loads and high values of pressure rise under high loads [7]. Similar results were obtained by other authors; all of them showed that the share of ethanol has a positive effect on soot emissions, while there are different opinions regarding NO x emissions [8][9][10][11]. On the one hand, ethanol reduces the temperature on the compressed load due to the high heat of vaporization. On the other hand, it increases the value of the maximum pressure and, consequently, the combustion temperature, contains additional oxygen in the structure, it promotes the formation of NO x [12][13][14]. Ethanol greatly affects the combustion stage. This is confirmed by the result of basic research carried out using specialized combustion chambers [15][16][17][18]. The authors of research papers using piston engines came to similar conclusions with basic research [9,11,19]. In the paper of Paul et al., regarding the investigation of blend combustion, authors presented results of investigation of diesel-ethanol combustion process in diesel engine. Ethanol percentage was increased from 5% to 20% with intervals of 5%, thus reducing the diesel participation. Paul et al. stated that a blend w...

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confidence: 52%

Comparative Analysis of Combustion Stability of Diesel/Ethanol Utilization by Blend and Dual Fuel

Tutak

Jamrozik

2019

Processes

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“…The single value represents only the general nature of the changes. For a complete view of the variability of these values, the dispersion for the entire analyzed data set should be taken into account [24][25][26]. This is especially important when determining the conventional end of combustion, where this discharge can be very large.…”

Section: Stability Of Combustion Processmentioning

confidence: 99%

The Effect of RME-1-Butanol Blends on Combustion, Performance and Emission of a Direct Injection Diesel Engine

2021

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The main objective of this study was assessment of the performance, emissions and combustion characteristics of a diesel engine using RME–1-butanol blends. In assessing the combustion process, great importance was placed on evaluating the stability of this process. Not only were the typical COVIMEP indicators assessed, but also the non-burnability of the characteristic combustion stages: ignition delay, time of 50% heat release and the end of combustion. The evaluation of the combustion process based on the analysis of heat release. The tests carried out on a 1-cylinder diesel engine operating at a constant load. Research and evaluation of the combustion process of a mixture of RME and 1-butanol carried out for the entire range of shares of both fuels up to 90% of 1-butanol energetic fraction. The participation of butanol in combustion process with RME increased the in-cylinder peak pressure and the heat release rate. With the increase in the share of butanol there was noted a decrease in specific energy consumption and an increase in engine efficiency. The share of butanol improved the combustion stability. There was also an increase in NOx emissions and decrease in CO and soot emissions. The engine can be power by blend up to 80% energy share of butanol.

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“…Such engines allowed to significantly reduce soot emissions from exhaust gas by eliminating the diffusion combustion phase. In other solutions, alcohols were used as complementary fuel to diesel fuel [6][7][8]. Alcohols due to the oxygen content in their structure greatly reduce soot emissions.…”

Section: Introductionmentioning

confidence: 99%

Combustion and Emission Characteristics of a Biodiesel-Hydrogen Dual-Fuel Engine

2020

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The paper presents the results of co-combustion of biodiesel with hydrogen in a compression-ignition internal combustion engine. The tests were carried out on a stationary engine with constant settings. The paper presents the results of the assessment of the combustion process, combustion stability and exhaust emissions in a dual-fuel diesel engine fueled with biodiesel and hydrogen. It was found that it is possible to replace biodiesel with hydrogen to its energetic share of 38%. The share of hydrogen in the co-combustion process causes a change in combustion phases and reducing the duration of combustion. The increase of the engine thermal efficiency was obtained with the increase of the H2 share. A different character of heat release rate was obtained compared to a conventional engine. The reduction in the diffusion combustion phase has contributed to a significant reduction in soot emissions. The maximum 38% of hydrogen energy share acceptable by the engine, resulted in a more than 25-times reduction in soot emissions. The combustion stability assessed on the basis of the unrepeatability of the indicated mean effective pressure (COVIMEP) index and also on the basis of the indicated mean effective pressure (IMEP) normal distribution was also analyzed.

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Combustion of different reactivity fuel mixture in a dual fuel engine

Cited by 11 publications

References 31 publications

Comparative Analysis of Combustion Stability of Diesel/Ethanol Utilization by Blend and Dual Fuel

Comparative Analysis of Combustion Stability of Diesel/Ethanol Utilization by Blend and Dual Fuel

The Effect of RME-1-Butanol Blends on Combustion, Performance and Emission of a Direct Injection Diesel Engine

Combustion and Emission Characteristics of a Biodiesel-Hydrogen Dual-Fuel Engine

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