Impact of oxygen enriched combustion on the performance of a single cylinder diesel engine

Rajkumar, K.; Govindarajan, P.

doi:10.1007/s11708-011-0157-7

Cited by 6 publications

(5 citation statements)

References 6 publications

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“…This result agrees well with the study by Monirul et al, who reported a 4.19% increase in BP when 10% POB was added to diesel compared to pure diesel. This is due to the increase in O 2 content, in the fuel molecule of the fatty acid in POB, resulting in a more effective combustion. , In addition, the lower density and viscosity of B10 can influence the power loss due to higher leakages at the fuel pump compared with WPO100 . Meanwhile, Ali et al reported a decrease of 0.49% in BP by adding 10% POB to diesel compared to pure diesel.…”

Section: Results and Discussionmentioning

confidence: 99%

Effect of Addition of Palm Oil Biodiesel in Waste Plastic Oil on Diesel Engine Performance, Emission, and Lubricity

Awang

Zulkifli

et al. 2021

ACS Omega

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This research was aimed to examine the diesel engine’s performance and emission of secondary fuels (SFs), comprising waste plastic oil (WPO) and palm oil biodiesel (POB), and to analyze their tribological properties. Their compositions were analyzed by gas chromatography–mass spectrometry (GC–MS). Five SFs (10–50% POB in WPO) were prepared by mechanical stirring. The results were compared to blank WPO (WPO100) and Malaysian commercial diesel (B10). WPO90 showed the maximum brake power (BP) and brake torque (BT) among the SFs, and their values were 0.52 and 0.59% higher compared to B10, respectively. The increase in POB ratio (20–50%) showed a negligible difference in BP and BT. WPO70 showed the lowest brake-specific fuel consumption among the SFs. The brake thermal efficiency (BTE) increased with POB composition. The maximum reductions in emission of hydrocarbon (HC, 37.21%) and carbon monoxide (CO, 27.10%) were achieved by WPO50 among the SFs. WPO90 showed the maximum reduction in CO 2 emission (6.78%). Increasing the POB composition reduced the CO emissions and increased the CO 2 emissions. All SFs showed a higher coefficient of friction (COF) than WPO100. WPO50 showed the minimal increase in COF of 2.45%. WPO90 showed the maximum reduction in wear scar diameter (WSD), by 10.34%, compared to B10. Among the secondary contaminated samples, SAE40-WPO90 showed the lowest COF, with 5.98% reduction compared to SAE40-WPO100. However, with increasing POB content in the secondary contaminated samples, the COF increased. The same trend was also observed in their WSD. Overall, WPO90 is the optimal SF with excellent potential for diesel engines.

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Section: Results and Discussionmentioning

confidence: 99%

Effect of Addition of Palm Oil Biodiesel in Waste Plastic Oil on Diesel Engine Performance, Emission, and Lubricity

Awang

Zulkifli

et al. 2021

ACS Omega

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“…The schematic above is highly simplified, and it attempts to depict changes of the liquid–wall interactions and impinging flame morphology under different altitude conditions only based on the results discussed in this work. However, it can furnish the diesel engine community with a mental image to promote new thinking beyond the popular solutions, such as two-stage turbocharger systems, − alternative fuels, − oxygen enrichment of the intake air, − adjusted injection systems, − and advanced injection strategies, − to recover and improve the performance of diesel engines operating in plateau regions. Herein, we attempt to analyze two viewpoints.…”

Section: Role Of Altitude In Spray Combustion Process Of Impinging Di...mentioning

confidence: 99%

Role of Altitude in Influencing the Spray Combustion Characteristics of a Heavy-Duty Diesel Engine in a Constant Volume Combustion Chamber. Part II: Impinging Diesel Jet

Wang,

Lou

et al. 2024

ACS Omega

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Wall impingement, particularly liquid−wall impingement, has been demonstrated to be one of the critical causes of combustion deterioration in plateau diesel engines. Obviously, the complexity of wall impingement is exacerbated by the plateau scenario. However, fundamental studies specifically dedicated to this phenomenon are still inconclusive and insufficiently detailed, obviating the feasibility of the targeted design and optimization of diesel engines operating in regions with different altitudes. Consequently, the second part of this investigation, presented in this work, focused on the detailed physical and chemical processes of impinging spray combustion under different altitude conditions. A wall impingement system was designed to generate an impinging spray flame. The impingement distance was varied from 77 to 37 mm to cover different situations of wall impingement. The liquid spray, ignition, and combustion processes were visualized in detail by using different optical diagnostics. The results showed that the variation of the liquid length with the impingement distance was mainly dependent on the liquid impingement under the same altitude condition. The effect of the impingement distance on the ignition distance was more sensitive to the altitude. The quantitative analysis of the flame natural luminosity confirmed the decisive effect of the impinging flame morphology on the ambient entrainment and fuel−air mixing under different altitude conditions, and it also revealed that there was an optimal impingement distance under identical altitude conditions to achieve minimum soot emissions. And interestingly, the optimal impingement distance increased with altitude. Finally, the spray combustion processes of an impinging diesel jet were determined to occur in four typical regions, upon which a schematic diagram depicting the flame structure of an impinging diesel jet was proposed to phenomenologically describe the role of altitude in impinging spray combustion processes. Based on this, an attempt was made to explore some new perspectives beyond the popular solutions to recover and improve the performance of plateau diesel engines.

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“…So the higher output of exhaust gas is the simplest form to study the combustion efficiency [14] . Higher oxygen levels in mixture can increase the combustion rate and high compression ratios also increase the temperature by increasing the pressure resulting higher temperatures of exhaust gas due to more complete combustion [15] .…”

Section: E Exhaust Gas Temperaturementioning

confidence: 99%

Effects of Additional Oxygen Supply in Single Cylinder Diesel Fuel Using Variable Compression Ratio Engine

Yadav¹,

Gupta²,

Gupta³

2017

IJET

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-In the present study, a variable compression single cylinder diesel engine was used to study the effects of oxygen enrichment on the performance of engine at different compression ratios (C.R.) from 16.5 to 19.5 at different loads and compared to the amount of additional oxygen in four different rates from 1L/min to 4L/min. Oxygen cylinders were connected to intake manifold with throttle valve to supply additional oxygen. Enrichment of oxygen favours combustion in many performance parameters so the tests were carried out for the brake power (B.P.), Mean effective pressure, (P mef ), specific fuel consumption (S.F.C.), Mechanical efficiency (η mecheff ) and exhaust gas temperature (E.G.T.). The purpose of this study is to deal with the major technological characteristic of enriched oxygen used in variable compression ratio single cylinder diesel engine for best possible values of secure engine limits. The test results show that the combustion performances were enhanced as there was increase in B.P., P mef and decrease in S.F.C. and increase in rate of oxygen in intake air increases the charge burning rates and flame combustibility resulting higher exhaust gas temperature. Overall mechanical efficiency in lower compression ratio was high but for higher compression ratios there was a drop in mechanical efficiency. Keywords -Oxygen Enrichment, Variable Compression Ratio, Brake Power, Specific Fuel Consumption, Exhaust Gas Temperature.I. INTRODUCTION In diesel engine combustion, ratio of fuel varies according to load requirements, so principle of using air in diesel engines says that excess air improves mixing rates but at the time of exhaust, it also carry heat at higher rates which affect the thermal efficiency of each cycle. In the mixture of fuel and air in small diesel engines mixing rates depend on many designs and operating variables and those variables will affect the performance of any engine. According to research under the subject of oxygen enrichment, it results that a certain level of oxygenation can improve the mixing rates to increase the performance and reduce the certain amount of emissions [1] [5] .The investigation and research in this field are very vast and conclusive in many respects. All results show a considerable increase in oxides of nitrogen and decrease in smoke, carbon monoxides and unburned hydrocarbons as the ratio of oxygen increases. Reduction in engine noise due to elevated oxygen level in induced air is also concluded by researchers [4] . Higher oxygen concentrations increase the mixtures' burning rate at the same compression ratio and low quality fuel can also be used in engines without much affecting the performance. The main drawback of oxygen enrichment is higher level of oxides of nitrogen in exhaust due to increased maximum pressure in combustion chamber. The efforts of many researchers conclude a range of percentage of maximum concentration of oxygen in intake is 30% by volume in which both particulate matters and oxides of nitrogen can be reduced for a fixed geome...

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Impact of oxygen enriched combustion on the performance of a single cylinder diesel engine

Cited by 6 publications

References 6 publications

Effect of Addition of Palm Oil Biodiesel in Waste Plastic Oil on Diesel Engine Performance, Emission, and Lubricity

Effect of Addition of Palm Oil Biodiesel in Waste Plastic Oil on Diesel Engine Performance, Emission, and Lubricity

Role of Altitude in Influencing the Spray Combustion Characteristics of a Heavy-Duty Diesel Engine in a Constant Volume Combustion Chamber. Part II: Impinging Diesel Jet

Effects of Additional Oxygen Supply in Single Cylinder Diesel Fuel Using Variable Compression Ratio Engine

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