scholarly journals Combustion and Emission Characteristics of Variable Compression Ignition Engine Fueled withJatropha curcasEthyl Ester Blends at Different Compression Ratio

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Rajneesh Kumar ◽  
Anoop Kumar Dixit
Keyword(s):  
Compression Ratio ◽  
Diesel Fuel ◽  
Engine Performance ◽  
Emission Characteristics ◽  
Compression Ignition Engine ◽  
Performance And Emission ◽  
Peak Heat Release Rate ◽  
Ignition And Combustion ◽  
Co Emission ◽  
Load Conditions

Engine performance and emission characteristics of unmodified biodiesel fueled diesel engines are highly influenced by their ignition and combustion behavior. In this study, emission and combustion characteristics were studied when the engine operated using the different blends (B10, B20, B30, and B40) and normal diesel fuel (B0) as well as when varying the compression ratio from 16.5 : 1 to 17.5 : 1 to 18.5 : 1. The change of compression ratio from 16.5 : 1 to 18.5 : 1 resulted in 27.1%, 27.29%, 26.38%, 28.48%, and 34.68% increase in cylinder pressure for the blends B0, B10, B20, B30, and B40, respectively, at 75% of rated load conditions. Higher peak heat release rate increased by 23.19%, 14.03%, 26.32%, 21.87%, and 25.53% for the blends B0, B10, B20, B30, and B40, respectively, at 75% of rated load conditions, when compression ratio was increased from16.5 : 1 to 18.5 : 1. The delay period decreased by 21.26%, CO emission reduced by 14.28%, andNOxemission increased by 22.84% for B40 blends at 75% of rated load conditions, when compression ratio was increased from 16.5 : 1 to 18.5 : 1. It is concluded that Jatropha oil ester can be used as fuel in diesel engine by blending it with diesel fuel.

Exergy and Energy Analysis of α-Fe2O3-Doped Al2O3 Nanocatalyst-Based Biodiesel Blends—Performance and Emission Characteristics

2021 ◽  
Vol 143 (12) ◽  
Author(s):  
A. Anderson ◽  
Amal M. Al-Mohaimeed ◽  
Mohamed Soliman Elshikh ◽  
T. R. Praveenkumar ◽  
M. Sekar
Keyword(s):  
Carbon Monoxide ◽  
Energy Analysis ◽  
Unsaturated Fatty Acids ◽  
Engine Performance ◽  
Volume Ratio ◽  
Emission Characteristics ◽  
Biodiesel Blends ◽  
Performance And Emission ◽  
High Area ◽  
Load Conditions

Abstract The current study emphasis on the engine performance and emission characteristics of rapeseed and soya biodiesel dispersion on a novel nanocatalyst at different concentrations of 25 ppm and 50 ppm. The results of this study were compared with those of conventional diesel at varying load conditions on a combustion ignition engine. An α-Fe2O3-doped Al2O3 was mixed with rapeseed biodiesel and soya biodiesel using an ultrasonicator at a frequency of 25 kHz. This study revealed that the incorporation of nanoparticles in biodiesel enhanced the performance of the blends by reducing the content of lignin and other unsaturated fatty acids. The improvement in the performance of the engine is mainly attributed to the high area-to-volume ratio of the nanocatalyst. Emissions of NOx. hydrocarbon and carbon monoxide during the combustion reaction increased significantly when nanoparticles were added at higher concentrations. Contrastingly, the emission of NOx in pure biodiesel was higher than that in conventional diesel. The addition of nanoparticles reduced CO emissions due to the presence of extra oxygen molecules and converted carbon monoxide into carbon dioxide. Soya seed biodiesel blends with 50 ppm nanoparticles showed better engine performance and emission characteristics as compared with all other blends.

Performance and Emission Characteristics of a Diesel Engine Using Vegetable Oil Blended Fuel

2005 ◽  
Author(s):  
Yaodong Wang ◽  
Neil Hewitt ◽  
Philip Eames ◽  
Shengchuo Zeng ◽  
Jincheng Huang ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Vegetable Oil ◽  
Diesel Fuel ◽  
Emission Characteristics ◽  
Oxides Of Nitrogen ◽  
Fuel Blend ◽  
Engine Load ◽  
Performance And Emission ◽  
Fuel Blends ◽  
Co Emission

Experimental tests have been carried out to evaluate the performance and emissions characteristics of a diesel engine when fuelled by blends of 25% vegetable oil with 75% diesel fuel, 50% vegetable oil with 50% diesel fuel, 75% vegetable oil with 25% diesel fuel, and 100% vegetable oil, compared with the performance, emissions characteristics of 100% diesel fuel. The series of tests were conducted and repeated six times using each of the test fuels. 100% of ordinary diesel fuel was also used for comparison purposes. The engine worked at a fixed speed of 1500 r/min, but at different loads respectively, i.e. 0%, 25%, 50%, 75% and 100% of the engine load. The performance and the emission characteristics of exhaust gases of the engine were compared and analyzed. The experimental results showed that the carbon monoxide (CO) emission from the vegetable oil and vegetable oil/diesel fuel blends were nearly all higher than that from pure diesel fuel at the engine 0% load to 75% load. Only at the 100% engine load point, the CO emission of vegetable oil and vegetable oil/diesel fuel blends was lower than that of diesel fuel. The hydrocarbon (HC) emission of vegetable oil and vegetable/diesel fuel blends were lower than that of diesel fuel, except that 50% of vegetable oil and 50% diesel fuel blend was a little higher than that of diesel fuel. The oxides of nitrogen (NOx) emission of vegetable oil and vegetable oil/diesel fuel blends, at the range of tests, were lower than that of diesel fuel.

scholarly journals Performance and emission characteristics of preheating corn oil methyl ester in CI Engine

Mechanika ◽  
2019 ◽  
Vol 25 (5) ◽  
pp. 413-418
Author(s):  
Gopinath Varudharajan
Keyword(s):  
Methyl Ester ◽  
Diesel Fuel ◽  
Alternative Fuels ◽  
Corn Oil ◽  
Waste Heat ◽  
Emission Characteristics ◽  
Exhaust Gas ◽  
Compression Ignition Engine ◽  
Suitable Alternative ◽  
Performance And Emission

In the present work on unheated Corn oil methyl ester and Preheated Corn oil methyl ester is used to prepare different concentration blends with diesel, B20, B40 and B60 were used as alternative fuels in a compression ignition engine. The properties like calorific value, flash point, fire point and viscosity of these oils were determined. The viscosity of corn oils has been reduced through transterification process. The waste heat energy from the exhaust gas was reused to preheat the corn oil around 80°C by adjusting the flow rate of exhaust gas.  The performance and emission characteristics of a single cylinder, direct injection diesel engine were determined using unheated corn oil, Preheated Corn oil and diesel. Brake thermal efficiency of preheated B20 was more than other blends and unheated fuels but equal to diesel fuel. Brake specific fuel consumption, CO2 and HC of preheated B20 were less than unheated fuels and diesel. However, the NOx emission of preheated B20 was little higher than unheated fuels and diesel due to high combustion temperature. By considering the result of all the factors, preheated B20 blend was found to be a suitable alternative for diesel fuel.

scholarly journals The Effect of Oxygenated Turpentine Oil Additive in Diesel Fuel on the Performance and Emission Characteristics in One-Cylinder DI Engines

Designs ◽  
2021 ◽  
Vol 5 (4) ◽  
pp. 73
Author(s):  
Asep Kadarohman ◽  
Fitri Khoerunnisa ◽  
Syazwana Sapee ◽  
Ratnaningsih Eko Sardjono ◽  
Izuan Izzudin ◽  
...  
Keyword(s):  
Flow Rate ◽  
Diesel Fuel ◽  
Cetane Number ◽  
Engine Performance ◽  
High Water ◽  
High Water Content ◽  
Emission Characteristics ◽  
Fuel Flow Rate ◽  
Performance And Emission ◽  
Fuel Flow

A study on the application of oxygenated turpentine oil as a bio-additive in diesel fuel was conducted. The purpose of this research was to investigate the effect of oxygenated turpentine oil additive in diesel fuel on the performance and emission characteristics in diesel engines. Oxygenated turpentine oil is obtained from the oxidation process of turpentine oil. In this experimental study, the influences of oxygenated turpentine oil-diesel blended fuel OT0.2 (0.2% vol oxygenated turpentine oil and 99.8% vol diesel) were compared with pure diesel on engine performance, and emission characteristics were examined in a one-cylinder four-stroke CI engine. The test was performed at two engine loads (25% and 50%) and seven engine speeds (from 1200–2400 rpm with intervals of 200 rpm). The physiochemical characteristics of test fuels were acquired. The engine indicated power, indicated torque, fuel flow rate, and emissions (carbon dioxide, CO2; carbon monoxide, CO; and nitrogen oxide, NOX) were examined. The results revealed that the engine power shows slight increments of 0.7–1.1%, whereas the engine torque slightly decreased with oxygenated turpentine usage compared to pure diesel in most conditions. Furthermore, a reduction in NOX emission decreased by about 0.3–66% with the addition of oxygenated turpentine in diesel compared to diesel. However, usage of OT0.2 decreased fuel flow rate in most speeds at low load but gave a similar value to diesel at 50% load. CO emissions slightly increased with an average of 1.2% compared to diesel while CO2 emissions increased up to 37.5% than diesel. The high-water content, low cetane number, and low heating value of oxygenated turpentine oil were the reasons for the inverse effect found in the engine performances.

scholarly journals The effect of compression ratio on the performance and emission characteristics of C.I. Engine fuelled with corn oil biodiesel blended with diesel fuel.

2021 ◽  
Vol 779 (1) ◽  
pp. 012062
Author(s):  
Abdulrahman Shakir Mahmood ◽  
Haqi I. Qatta ◽  
Saadi M. D. Al-Nuzal ◽  
Talib Kamil Abed ◽  
Abdulwahab Ahmed Hardan
Keyword(s):  
Compression Ratio ◽  
Diesel Fuel ◽  
Corn Oil ◽  
Emission Characteristics ◽  
Performance And Emission

Comparison of Different Chemical Kinetic Models for Biodiesel Combustion

2013 ◽  
Author(s):  
S. Som ◽  
Z. Wang ◽  
W. Liu ◽  
D. E. Longman
Keyword(s):  
Cetane Number ◽  
Engine Performance ◽  
Constant Volume ◽  
Emission Characteristics ◽  
Volume Data ◽  
Compression Ignition Engine ◽  
Performance And Emission ◽  
3 Dimensional ◽  
Stirred Reactor ◽  
Surrogate Mixture

The current study compares the predictions by four different published mechanisms in literature which have been used for 3 dimensional compression ignition engine simulations. These four mechanisms use two different sets of surrogates: (a) methyl decanoate, methyl 9-decenoate, and n-heptane, (b) methyl butanoate and n-heptane. The mechanisms include: (1) 115 species and 460 reactions [1] using surrogate mixture (a); (2) 77 species and 209 reactions [2] using surrogate mixture (a); (3) 145 species and 869 reactions [3] using surrogate mixture (b); (4) 41 species and 150 reactions [4] using surrogate mixture (b). The different reduction techniques implemented to obtain the reduced mechanisms from the detailed mechanisms are briefly described. The surrogate mixture compositions are then modified to match the cetane number of the real biodiesel fuels. The experimental data for comparison include jet-stirred reactor data for species concentrations for biodiesel derived from rapeseed oil and 3 dimensional constant volume combustion data (for ignition, combustion, and emission characteristics), engine data (for pressure, heat release rate, and emission characteristics) for soy-derived biodiesel. 0-D and 3-D constant volume simulations with all the mechanisms can capture the general experimental trends quite well. Large surrogate models and mechanisms tend to provide better predictions at the expense of increased computational costs. The 115 species and 460 reaction mechanism was observed to perform the best among the mechanisms in predicting the jet-stirred reactor and 3-D constant volume data. It was observed that all the mechanisms are able to qualitatively capture the engine performance and emission characteristics.

Engine Performance and Emission of Emulsified Biodiesel

2014 ◽  
Vol 607 ◽  
pp. 588-593 ◽  
Author(s):  
Amir Aziz ◽  
Ahmad Fitri Yusof ◽  
Rizalman Mamat ◽  
W.N. Azeem
Keyword(s):  
Diesel Engine ◽  
Water Content ◽  
Experimental Work ◽  
Diesel Fuel ◽  
Engine Performance ◽  
Emission Characteristics ◽  
Nox Formation ◽  
Performance And Emission ◽  
Set Up ◽  
Emulsified Biodiesel

An emulsion of biodiesel and water is one of the possible approaches that have been used to overcome diesel engine pollution. In this work, the performance and emission characteristics of a 4-cylinder diesel engine using pure diesel, biodiesel B20 and emulsified biodiesel were investigated. Emulsified biodiesel containing 5 % and 10 % water were utilize for the engine tests. During the experimental work, the engine was set-up at 2500 rpm and 20 % to 60 % loads. The result shows the reduction in NOx formation when the water content in emulsified biodiesel increased from 5 % to 10%. For the performance, there were no significant differences between the engine break powers measured for emulsified biodiesel containing 5% water and diesel fuel.

scholarly journals Investigation of Performance and Emission Parameters of Hydroxygen (HHO)-Enriched Diesel Fuel with Water Injection in the Compression Ignition Engine

2021 ◽  
Vol 3 (3) ◽  
pp. 537-562
Author(s):  
Romualdas Juknelevičius ◽  
Alfredas Rimkus ◽  
Saugirdas Pukalskas ◽  
Stanislaw Szwaja
Keyword(s):  
Diesel Fuel ◽  
Water Injection ◽  
Combustion Process ◽  
Pressure Rise ◽  
Engine Performance ◽  
Hydrogen Energy ◽  
Compression Ignition Engine ◽  
Performance And Emission ◽  
Emission Regulations ◽  
Ci Engines

The development of engine technologies and research on combustion processes are focused on finding new generation CI engines with simple control of the combustion process while efficiently maintaining desirable engine performance and meeting emission regulations. This comprehensive study on the relatively low hydrogen energy fraction (0.65–1.80%), supplied by onboard water electrolysers and on water injection, was performed on the performance and emission parameters of the CI engine. The article presents results of both experiment and simulation about the effect of hydroxygen and water injection on the combustion process, auto-ignition delay, combustion intensity, the temperature of the mixture and engine performance at BMEP of 0.2 MPa, 0.4 MPa, 0.6 MPa, and 0.8 MPa at a speed of 1900 rpm. For the first part, the test engine operated with diesel fuel with 3.5 L/min of hydroxygen gas supplied with an external mixture formation. The HHO has an effect on the combustion process at all range of BMEP. A decrease in BTE and increase in BSFC were noticed during tests. The peak pressure and the rate of heat release decreased, but the NOx decreased as well. The second part of experiment was performed with the injection of a substantial amount of water, 8.4–17.4 kg/h (140–290 cm3/min), and the same amount of hydroxygen. The injection of water further decreased the NOx; therefore, HHO and WI can be used to meet emission regulations. A simulation of the combustion process was carried out with the AVL BOOST sub-program BURN. The AVL BOOST simulation provided a detailed view of the in-cylinder pressure, pressure-rise, combustion intensity shape parameter and SOC.

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