Effect of oxygen enrichment on the performance, combustion, and emission of single cylinder stationary CI engine fueled with cardanol diesel blends

Dinesha, P.; Nayak, Vighnesha; Mohanan, P.

doi:10.1007/s12206-014-0644-y

Cited by 19 publications

(10 citation statements)

References 7 publications

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“…Increase in oxygen concentration increase the mixture ratio of specific heat, this increases the conversion rate of the mixture thermal energy to work energy. The NO x level increases as the oxygen percentage increases [6] [8] [9] . The oxygen concentration increases the brake power significantly increases [13] [14] [15] .…”

Section: A Brake Powermentioning

confidence: 99%

“…The most convenient method for research is adding raw oxygen to intake for certain percentage by volume. Oxygenation methods also improves the emission and performance for biodiesels and diesel blends [6] [10] [19] .For a fixed volume of combustion chamber and rated speed, a certain amount of oxygen can be added for optimum values of emission because the limitation of maximum pressure and temperature, that can be further controllable by the help of different compression ratios. Thus the purpose of the study to investigate the effect of oxygen enriched combustion at different compression ratio on a single cylinder four stroke naturally aspirated diesel engine with different level of oxygen concentration and compression ratios.…”

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confidence: 99%

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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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Section: A Brake Powermentioning

confidence: 99%

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confidence: 99%

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

Yadav¹,

Gupta²,

Gupta³

2017

IJET

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“…Oxygen enrichment in the intake air is considered as one of the effective methods in reducing smoke and particulate emissions in Diesel engines when using vegetable oils as fuels. It is a simple method which needs no modification in either engine side or in fuel side [6][7][8]. Oxygen enriched combustion in Diesel engines was attempted by a number of researchers in the past using diesel and vegetable oils as fuels and reported that oxygen enrichment technique could be adopted for reducing smoke, HC and CO emissions of Diesel engines fuelled with vegetable oils as fuel [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…It is a simple method which needs no modification in either engine side or in fuel side [6][7][8]. Oxygen enriched combustion in Diesel engines was attempted by a number of researchers in the past using diesel and vegetable oils as fuels and reported that oxygen enrichment technique could be adopted for reducing smoke, HC and CO emissions of Diesel engines fuelled with vegetable oils as fuel [7][8][9]. However, past studies reported that the emissions of NOx were significantly high with oxygen enrichment technique with diesel and vegetable oils as fuels in Diesel engines due to the excess oxygen present in the combustion chamber and the attainment of high temperature of the products of combustion [8,9].…”

Section: Introductionmentioning

confidence: 99%

The influence of air side and fuel side water addition on engine’s behaviour of a biofuel based compresion ingnition engine under oxygen enriched combustion

Masimalai

2020

THERM SCI

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The effect of water injection at the air side and water addition at fuel side on engine's performance of a Diesel engine was studied under oxygen enriched intake air using neat mahua oil as fuel. Initially experiments were carried out using neat mahua oil as fuel with different oxygen concentrations such as 21% (ambient), 22.4%, 23.8%, and 24.7% by volume at the air side. The optimal oxygen concentration was found based on the engine's brake thermal efficiency. At the optimal oxygen concentration water injection was done on air side at 4% by mass and the experiments were repeated with neat mahua oil as fuel under oxygen enrichment mode. Finally, mahua oil emulsion was prepared using the same amount of water (i. e. 4%) and tested in the engine. A comparative study was made for the same amount of water (i. e. 4% as optimal) for water injection and neat mahua oil emulsion on engines behavior. Oxygen enrichment increased the brake thermal efficiency with all concentrations and reached the maximum value from 25.2% with ambient oxygen to a maximum of 30.6% at 23.8% of oxygen enrichment at the maximum brake mean effective pressure of 5.4 bar whereas it was 30.8% with neat diesel. The smoke, HC, and CO emissions were significantly reduced with oxygen enrichment. However, oxygen enrichment increased the NO emissions at all concentrations. Injection of water and emulsification techniques reduced the NO emissions considerably. Emulsification showed more reduction in NO emission than water injection for the same amount of water. It was concluded from the study that neat mahua oil could be effective used as fuel in compression ignition engines by combusting it under oxygen enriched condition. The optimal oxygen concentration of 23.8% could be recommended for the highest brake thermal efficiency. Injection of water at the intake manifold and emulsification techniques could solve the problem of higher NO emissions. The optimal amount of water that could be injected without affecting the engines power and brake thermal efficiency could be recommended as 4% by volume. Emulsification has the added advantage of further improvement in engine's brake thermal efficiency.

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Influence of oxygen enrichment on performance, combustion, and emission characteristics of a stationary diesel engine fuelled with Calophyllum Inophyllum biodiesel blend

Sundar

Vijayabalan

Balachandar

et al. 2020

Asia-Pacific J Chem Eng

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Biodiesel‐fuelled diesel engine with oxygen enrichment technique is one of the promising attempts for improving the performance and combustion characteristics of an engine without compromising emissions. The present study emphasizes the utilization of Calophyllum Inophyllum biodiesel with three different percentages of oxygen rates, namely, 1%, 2%, and 3%, were inducted in the intake manifold of stationary diesel engine; and the results were compared with B20 (without oxygen enrichment) and conventional diesel. Results indicated that biodiesel blend B20 with 2% oxygen enrichment substantially improved the BTE to about 28.1%, which is higher than B20 and diesel fuel. The BTE is improved by 43.5 and 15% as compared with B20 and diesel fuel, respectively. Results also revealed that the cylinder pressure using B20 with 2% oxygen enrichment is improved to about 9.6% with B20 and diesel. The precombustion phase was reduced along with ignition delay, producing longer diffusion phase for all oxygen‐enriched fuels. Also, significant reduction in stringent emissions of CO (67% with B20 and 50% with diesel) and smoke (85% with B20 and 63% with diesel) but NOx emissions were increased. The experimental study reveals that the impact of oxygen enrichment on biodiesel blended fuel offered superior engine characteristics than diesel fuel.

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Effect of oxygen enrichment on the performance, combustion, and emission of single cylinder stationary CI engine fueled with cardanol diesel blends

Cited by 19 publications

References 7 publications

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

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

The influence of air side and fuel side water addition on engine’s behaviour of a biofuel based compresion ingnition engine under oxygen enriched combustion

Influence of oxygen enrichment on performance, combustion, and emission characteristics of a stationary diesel engine fuelled with Calophyllum Inophyllum biodiesel blend

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