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Comparative study of Performance and Emission Characteristics of a Diesel Engine Fueled by Emulsified Biodiesel/Diethyl Ether Blended Biodiesel  [PDF]
T.K. Kannan,R. Marappan
Journal of Applied Sciences , 2011,
Abstract: Biofuels are playing important role in recent decades as substitutes for petro diesel. Biodiesel derived from vegetable oils are found to give comparable performance and emission characteristics. In this paper a comparative study has been done between two fuels combinations i.e., emulsified biodiesel and DEE (Diethyl Ether) blended biodiesel to find the suitable combination of fuel in reducing the emissions and improving the performance of the diesel engine. Experiments have been conducted in a single cylinder diesel engine with biodiesel blended with DEE/Water in the ratios of 5%, 10%, 15% and 20% by volume. The results depicts that 15% emulsified biodiesel shows the highest brake thermal efficiency of 31.6% among all other fuel combinations at full load. Reduction of Nitrogen Oxide (NOx) is observed as 41% for 20% emulsified biodiesel than that of biodiesel at full load whereas only 26% of nitrogen oxide reduction is observed for 20% DEE blended biodiesel. However, the reduction of smoke emission is less for emulsified biodiesel when compared with DEE blend. Reduction in Hydro Carbon (HC) emissions is observed as 3.05% for 20% emulsified biodiesel than in biodiesel at full load whereas 7.7% increase in HC emissions is observed for 20% DEE blend. So it is concluded that the emulsified biodiesel results in better performance and less emissions than that of DEE blended biodiesel.
Numerical Simulation of Emission Characteristics for Single-Cylinder Diesel Engine  [PDF]
Changwei Ding, Weijun Liu
Energy and Power Engineering (EPE) , 2016, DOI: 10.4236/epe.2016.82008
Abstract: First, the geometry model and the calculation mesh of single-cylinder direct injection diesel engine are built, using ESE module of the 3D simulation software AVL FIRE v2014 [1]. Then, by setting appropriate boundary condition, initial condition and calculating step length, and selecting spray, the burning emissions on model and on the basis of adjusting the parameters, a scientific and reasonable simulation platform is built. Emission characteristics of single-cylinder diesel engines in oxygen-enriched, oxygen-enriched + EGR (inlet adding CO2), and separately using EGR would be studied. It is concluded that EGR synergy oxygen-enriched combustion is beneficial to exhaust treatment and 21% CO2 + 23% oxygen content is the optimal matching to improve diesel engine exhaust emissions.
Performance and Emission of Small Diesel Engine Using Diesel-Crude Palm Oil-Water Emulsion as Fuel  [cached]
J. Narkpakdee,A. Permsuwan,T. Deethayat,T. Kiatsiriroat
Energy Science and Technology , 2012, DOI: 10.3968/j.est.1923847920120302.279
Abstract: Diesel and crude palm oil (CPO) emulsion was drop-in replaced of diesel oil in a small diesel engine to test the engine performance and emission. In the study, the compositions of diesel/CPO/water of 95/0/5, 90/0/10, 90/5/5, 85/5/10, 85/10/5 and 80/10/10 by volume were used in a four-stroke single cylinder diesel engine having a pre-combustion chamber. The engine speed was in a range of 1000 – 2000 rpm. From the results, it could be found that the torque and the engine power for the emulsion of 90/5/5 were close to those of from the diesel oil and the performance were poorer when the percentages of CPO and water were increased. The specific fuel consumption of the emulsified oil with the composition of 90/5/5 was quite close to that of the diesel oil at low engine speed and higher consumption was needed with higher amount of CPO and water in the emulsion due to lower heating value in the emulsion. The emissions in terms of CO, NOx and black smoke for the emulsified oil could be reduced significantly. After 200h of the operation, the wear and the physical corrosions in the engine components for the emulsified fuel of 90/5/5 composition are not much different from those for the diesel oil. Key words: Palm –diesel emulsion; Diesel engine performance; Emission
Performance and Emission of Turbo Charged 4-Stroke Four Cylinder Diesel Engine using Blends of Diesel and Biodiesel which Produced from a Neem  [PDF]
Prajapti Jaivik J.,R.J.Jani
International Journal of Engineering Sciences & Research Technology , 2013,
Abstract: This works about the engine performance and emissions characteristics of NOME biodiesel on diesel engine. Overall, the engine performance of the NOME biodiesel and its blends was only poorer performance than diesel at full load condition. From the view of emissions, NOx emissions were slightly higher in NOME than diesel while un-burnt hydrocarbon emissions were higher for NOME than diesel fuel. The aim of the present work is to prepare Neem oil methyl ester as a diesel fuel substitute. High viscosity and poor volatility are the major limitations of Neem oil for utilization as a fuel in diesel engines. This works discusses the results of investigations carried out on a 4 stroke 4-cylinder, direct injection, diesel engine operated on methyl esters of Neem oil blended with various blend like pure diesel, B05 (Biodiesel 5% and Diesel 95%), B10 (Biodiesel 10% and Diesel 90%), B15 (Biodiesel 15% and Diesel 85%) , B20 (Biodiesel 20% and Diesel 80%) and B100 (100 % Biodiesel).The performance parameters For different NOME blends were found to be very close to diesel and the emission characteristics of engine improved significantly. At maximum load, Brake thermal efficiency of blend B5 (5% biodiesel + 95% mineral diesel) found 34.03 % lower than thatof diesel. For B5, brake specific fuel consumption 10.98 Kg/hr. observed was higher than that of diesel at higher load. HC emissions were increased from 2 to 19 for B5 blends as compared to diesel. HC emission were increased when the Neem oil methyl ester proportion were increased.CO emission decrease for different blend of methyl ester of Neem oil and diesel. CO2 emission was increased for the blends of Neem oil methyl ester as compared to diesel.
International Journal of Engineering Science and Technology , 2011,
Abstract: Biomass derived fuels are preferred as alternative fuels for IC engine due to its abundant availability and renewable nature. In the present work the performance, emission and combustion characteristics of a single cylinder constant speed , direct injection diesel engine using methyl ester of sun flower oil – eucalyptus oil blend as an alternative fuel were studied and the results are compared with thestandard diesel fuel operation. Result indicated that 50% reduction in smoke, 34% reduction in HC emission and a 37.5% reduction in CO emission for the MeS50Eu50 blend with 2.8 % increase in NOx emission at full load. Brake thermal efficiency was increased 2.7 % for eS50Eu50 blend.
Investigacion experimental de la prestaciones de un motor monocilíndrico usando combustible diesel emulsionado; Experimental investigation of the single cylinder engine performance using emulsified diesel fuel
Eliezer Ahmed- Melo Espinosa y otros
Ingeniería Energética , 2013,
Abstract: En esta investigación se realiza un análisis de las prestaciones y emisiones de un motor Petter mono-cilíndrico de inyección directa al usar como combustible una emulsión de 5% de agua, 2% de surfactante y combustible diesel. Los resultados obtenidos con la emulsión muestran un ligero incremento en el torque y la potencia efectiva, así como en el consumo específico de combustible y el retardo de la ignición. Respecto a las emisiones de gases contaminantes, los hidrocarburos noquemados (HC) y el monóxido de carbono (CO) para la emulsió aumentaron en comparación con los resultados obtenidos para el combustible diesel. En ambos casos, los aumentos son unaconsecuencia de la disminución de las temperaturas en el interior de la cámara de combustión, los aumentos en el retardo de la ignición y al enfriamiento de la llama.In this investigation an analysis based on the performances and emission of a Petter single cylinderdirect injection diesel engine when using an emulsion of 5% of water, 2% of surfactant and diesel fuel as fuel is carried out. The result obtained with the emulsion tested shown slight increase ineffective torque and power output, but also increases in brake specific fuel consumption and ignition delay. Concerning the exhausts, increases in hydrocarbons (HC) and carbon monoxide(CO) emissions for emulsion were obtained. In both cases the increases are due to the effect of lower temperatures inside the combustion chamber, longer ignition delays and quenching of theflame.
Meyyappan Venkatesan
International Journal of Advances in Engineering and Technology , 2013,
Abstract: In the present investigation test were carried out to examine the performance and emissions of a direct injection diesel engine blended with Jatropa bio-diesel prepared with methanol to get jatropa oil methyl ester (JOME) . Experiments are conducted with JOME single and dual fuel mode with compressed natural gas (CNG) in a single cylinder 4 stroke diesel engine. Performance parameters such as brake thermal efficiency (BTE) and brake specific fuel consumption (BSFC), emissions such as CO, UBHC, smoke density and NOx are determined at three injection pressures of 180, 200 and 220 bar and two injection timings 27obtdc and 31obtdc. Parameters are compared with base line data of diesel fuel. It was found through experiments that CNG - JOME can be used as fuel with better performance at 220 bar pressure and advanced injection timing of 31obtdc. The harmful pollutants such as UBHC, CO and NOx are reduced in jatropa oil methyl ester with CNG in single and dual fuel mode compared to diesel fuel.
Thevetia Peruviana biodiesel emulsion used as a fuel in a single cylinder diesel engine reduces NOx and smoke  [PDF]
Kandasamy Kannan T.A.,Rakkiyanna Gounderb Marappan
Thermal Science , 2011, DOI: 10.2298/tsci100810045k
Abstract: Biodiesel is a promising renewable alternative fuel for diesel. However, its adaptability is limited by its emission levels surpassing the existing emission norms. In this situation, it is essential to search for an economically apt way of reducing the pollutants so as to make biodiesel a viable proposition. Emulsified fuels have more priority in reducing Nitrogen Oxide (NOx) and smoke simultaneously than other fuels. In this study, Thevetia Peruviana biodiesel was emulsified with water in the ratios of 5%, 10%, 15% and 20% to investigate the engine performance and emission characteristics. Emulsified fuels showed an improvement in brake thermal efficiency accompanied by the drastic reduction in NOx. From the detailed study it was found that 15% water emulsified fuel showed the best performance and less emission than the other combinations.
International Journal of Engineering Science and Technology , 2012,
Abstract: In this study, biofuel, diesel and ethanol blends (BDEB) were tested in a single cylinder direct-injection diesel engine to investigate the engine combustion, performance and emission characteristics of the engine under five engine loads at the speed of 1500 rpm. Here the ethanol is used as an additive to enhance the engine combustion. The mixture of Commercial diesel fuel, biofuel from Cashew Nut Shell Liquid (CNSL) and ethanol mixture called BDEB is used to run the direct injection diesel engine. The different combination of BDEB asBDEB 5 (Diesel75%,Cnsl 20% and Ethanol 5%) , BDEB 10 (Diesel70%,Cnsl 20% and Ethanol 10%) and BDEB 15(Diesel65%,Cnsl 20% and Ethanol 15%), were tested in the engine. The results are compared with neat diesel fuel. The results showed that the addition of ethanol with bio-fuel and diesel enhance the engine combustion. The engine performance and emission is improved with 15% ethanol in biofuel (BDEB15). Theexperimental results showed that the CO, HC emission is decreased and NOx emission is increased. The brake thermal efficiency, exhaust gas temperature, brakes specific fuel consumption increased for BDEB15 compared to other combination of fuel.
International Journal of Engineering Science and Technology , 2011,
Abstract: In this present work a study about influence of the air swirl in the cylinder upon the performance and emission of a single cylinder diesel direct injection engine is presented. In order to achieve the different swirl intensities in the cylinder, three design parameters have been changed: the cylinder head, piston crown, and inlet duct. In this way, the piston crown is modified i.e. alteration of combustion chamber to enhance the turbulence in the cylinder. This intensification of the swirl is done by cutting grooves on the crown of the piston. In this work three different configurations of piston i.e. in the order of number of grooves 3,6,9 were used to intensifythe swirl for better mixing of fuel and air and their effects on the performance and emission are recorded.
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