scholarly journals Computational Analysis of Performance and Emissions of a Compression Ignition Engine under various Air Induction Methods

2014 ◽  
Vol 09 (1) ◽  
Keyword(s):  
Computational Study ◽  
Simulation Software ◽  
Compression Ignition Engine ◽  
Ic Engine ◽  
Performance And Emission ◽  
Engine Simulation ◽  
Performance And Emissions ◽  
Ci Engine ◽  
The Individual ◽  
Analysis Of Performance

A computational study on performance and exhaust emissions from a 4-stroke DI CI engine using different air induction methods was carried out. Using AVL Boost IC engine simulation software a model was developed with a Naturally Aspirated (NA) air induction mode, the second model was developed by incorporating a turbocharger (TC) and again a third model was developed by the introduction of a turbocharger along with an intercooler (TCI). The individual effects of all the three air induction methods on the performance and emission of engine were studied and compared. The power output for the engine with TCI was observed to be 7.8% more than that of an engine with TC, where as it was even greater i-e 20% more when compared with NA engine. Similar Improved results for torque were also observed in case of an engine with TCI. It was also observed that emissions were higher with TCI followed with TC and NA.

Engine performance and emission characteristics of a compression ignition engine fuelled with diesel/dimethoxymethane blends

2005 ◽  
Vol 219 (7) ◽  
pp. 905-914 ◽  
Author(s):  
Y Ren ◽  
Z H Huang ◽  
D M Jiang ◽  
L X Liu ◽  
K Zeng ◽  
...  
Keyword(s):  
Thermal Efficiency ◽  
Mass Fraction ◽  
Volume Fraction ◽  
Engine Performance ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Performance And Emission ◽  
Fuel Blends ◽  
Performance And Emissions ◽  
Combustion Phase

The performance and emissions of a compression ignition engine fuelled with diesel/dimethoxymethane (DMM) blends were studied. The results showed that the engine's thermal efficiency increased and the diesel equivalent brake specific fuel consumption (b.s.f.c.) decreased as the oxygen mass fraction (or DMM mass fraction) of the diesel/DMM blends increased. This change in the diesel/DMM blends was caused by an increased fraction of the premixed combustion phase, an oxygen enrichment, and an improvement in the diffusive combustion phase. A remarkable reduction in the exhaust CO and smoke can be achieved when operating on the diesel/DMM blend. Flat NO x/smoke and thermal efficiency/smoke curves are presented when operating on the diesel/DMM fuel blends, and a simultaneous reduction in both NO x and smoke can be realized at large DMM addition. Thermal efficiency and NO x give the highest value at 2 per cent oxygen mass fraction (or 5 per cent DMM volume fraction) for the combustion of diesel/DMM blends.

Influence of Nano Fuel Additives to Control Environmental Pollution from Naturally Aspirated Di-Ci Engine

2019 ◽  
Vol 1 (2) ◽  
pp. 45-54
Author(s):  
Prakash R ◽  
Murugesan A ◽  
Kumaravel A
Keyword(s):  
Environmental Pollution ◽  
High Speed ◽  
Direct Injection ◽  
Sol Gel ◽  
Volume Ratio ◽  
Mixing Rate ◽  
Compression Ignition Engine ◽  
Performance And Emission ◽  
Catalytic Material ◽  
Ci Engine

Diesel fuel is necessary for farming, transport, and industrialized sector. It contributes to the wealth of the universal economy while it is widely used due to having higher flexibility, combustion efficiency, consistency and handling facilities. However, emissions from fossil fuel are considered as the main source of environmental pollution. Thus, it becomes necessary to reduce emission by improving the performance of the engines. Recently the addition of catalytic material like nanoparticles to diesel proves to be a hopeful solution to reduce emission without much modification of the existing engine design. In the present study, the influence of nanoparticles doped with diesel on the performance and emission characteristics are carried out in a naturally aspirated, single-cylinder, four-stroke, water-cooled, 3.7 kW, direct-injection compression-ignition engine is coupled with eddy current dynamometer and high-speed data acquisition system. Cerium Oxide nanoparticles are selected as the best oxygen boosting catalytic nanoparticle and it is prepared by the sol-gel process.  Nanoparticles, then doped with diesel with the help of an Ultrasonicator with different molar concentrations (5 ppm, 7.5 ppm, 10 ppm, 15 ppm). Fuel properties of nano doped fuel samples are tested and presented in this paper. The DI CI engine experimental results were found to be brake thermal efficiency is increased by 3.6% by simultaneously reducing fuel consumption by 3.63% and also harmful environmental pollution like carbon monoxide, unburned hydrocarbon, carbon dioxide, and smoke level are decreased by 9.11%, 6.3%, 3.12%, and 12.6% respectively compared to pure diesel. It may be due to the enhanced surface to volume ratio, catalytic activity and improving the mixing rate of fuel and air in the combustion chamber.

Experimental Evaluation of Performance and Emissions of CI Engine Using Cottonseed Biodiesel with N-Butonal as a Additive

2014 ◽  
Vol 984-985 ◽  
pp. 855-866 ◽  
Author(s):  
J. Kanna Kumar ◽  
P. Mallikarjuna Reddy ◽  
K. Hemachandra Reddy
Keyword(s):  
Experimental Work ◽  
Engine Performance ◽  
Inlet Temperature ◽  
Fuel Additive ◽  
Performance And Emission ◽  
Air Inlet ◽  
Evaluation Of Performance ◽  
Performance And Emissions ◽  
Ci Engine ◽  
Concentration Levels

The present work concerns with the evaluation of performance and emissions characteristics of CI engine using cottonseed based biodiesel (B20) with fuel additive N-butonal at different concentration levels. In the experimental work it was observed that addition of N-butonal as additive improved the performance of CI engine and reduced the emission levels of NOx, CO, HC. Tests were also conducted the effect of inlet air preheating and results shows the significant improvement in the engine performance and reduction in the emission levels. Better performance and emission levels observed when the engine runs at air inlet temperature of 60°C

A Computational Study of In-Cylinder NOx Reduction Strategies for a Compression-Ignition Engine Fueled With Diesel/Hydrogen Mixtures

2015 ◽  
Author(s):  
Hassan A. Khairallah ◽  
Umit O. Koylu
Keyword(s):  
Chemical Kinetics ◽  
Alternative Fuels ◽  
Computational Study ◽  
Nox Reduction ◽  
Nox Emissions ◽  
Computational Results ◽  
Detailed Chemical Kinetics ◽  
Compression Ignition Engine ◽  
Performance And Emission ◽  
Main Challenge

Considerable efforts have been made to introduce alternative fuels for use in conventional diesel and gasoline engines. There is significant interest in adding hydrogen to a diesel engine to reduce emissions and improve efficiency. However, the main challenge associated with the use of hydrogen in diesel engines is high nitrogen oxide (NOX) emissions. In the present study, a reduced chemical kinetics mechanism, consisting of 52 reactions and 29 chemical species for n-heptane fuel combustion, was incorporated with detailed chemical kinetics consisting of 29 reactions for hydrogen as well as additional nitrogen oxidation. This reaction mechanism was coupled with 3-D advanced CFD software to investigate the performance and emission characteristics of a diesel-hydrogen dual-fuel engine. Computational results showed good agreements with the experimental results for brake thermal efficiency, CO2, CO, and NOX emissions. The model was then employed to examine the effects of exhaust gas recirculation (EGR) and N2 dilution on NOX emissions. The computational results quantified the reduction in NOX emissions with EGR and N2 dilution, and a more remarkable reduction was found with 30% N2 dilution. However, in terms of the N2 dilution, a general decreasing trend was observed for both NOX and CO2 emissions, while CO emissions increased. In relation to the EGR, the NOX emissions decreased while CO2 and CO emissions significantly increased. Additionally, the results showed that the indicated mean effective pressure (IMEP) and indicated power decreased as the N2 dilution increased. The same trend was observed for the EGR but the reduction was less compared to that of the N2 dilution.

scholarly journals Effect on CI Engine Piston by Waste Cooking Oil Biodiesel

2021 ◽  
Author(s):  
Adhirath Mandal ◽  
◽  
HaengMuk Cho ◽  
Bhupendra Singh Chauhan ◽  
◽  
...  
Keyword(s):  
Power Plants ◽  
Edible Oils ◽  
Waste Cooking Oil ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Ic Engine ◽  
Cooking Oil ◽  
Emission Standards ◽  
Transportation Sector ◽  
Ci Engine

The major contributor of pollution in the environment has been because of the transportation sector. Compression ignition engine has been a popular engine in the transportation sector. Compression ignition engines have been very popular in the power plants and marine engine because of its high compression ratio. Compressors and reciprocating engine(cylinder-piston) are the mechanical assembly in an IC engine. Change in air fuel mixture in the cylinder improves the combustion and emission. Rising concern for the environmental emission, strict rules have been implemented because of which automobile manufactures have to modify the engine to suit better the emission standards. Depleting fossil fuels and rising emission standards, biodiesel blend has gained interest as an alternate fuel, for being used in CI engine. Biodiesel could be produced from waste and non-edible oils, shows similar properties to conventional diesel fuel. Waste cooking oil as biodiesel have gained interest in the researchers. Employing waste cooking oil biodiesel in a CI engine, it was important to analyses the effect on cylinder and piston. This paper analyses and compares the thermal effect of the waste cooking oil biodiesel with conventional diesel on the piston of a CI engine.

scholarly journals Performance and Emission Analyses of Acetylene Dual Fuel Engine

2019 ◽  
Vol 8 (2S11) ◽  
pp. 2825-2828
Keyword(s):  
Flow Rate ◽  
Diesel Engines ◽  
Specific Energy Consumption ◽  
Dual Fuel ◽  
Flame Velocity ◽  
Ic Engine ◽  
Performance And Emission ◽  
Gaseous Fuels ◽  
Combustion Properties ◽  
Ci Engine

Fossil fuels are exhausting day by day at a very faster rate due to excessive demand for energy. Diesel engines are important prime movers used in different industries. When liquid petroleum fuels are burnt in diesel engines they emit harmful exhaust emissions which pollute the environment and may cause severe chronic diseases. Hence to mitigate over-dependency of crude oil and to protect the environment from harmful emissions, different engine experts and scientists have proposed dual fuel combustion technology to utilize low emissions renewable gaseous fuels without compromising its performance. Most of the work in the literature concentrate on utilizing gaseous fuels such as CNG, LPG, biogas, and hydrogen whereas very little quantum of work has been done to utilize acetylene in the IC engine. The higher flame velocity, high auto-ignition temperature, and high calorific value are the important combustion properties of acetylene which makes it more advantageous in CI engine than the available feedstock. The acetylene can be easily produced from calcium carbonate and water. Hence, the author has considered acetylene as a primary fuel in the present study and diesel as a pilot fuel in the modified CI engine. In this experimental investigation, the author has optimized the flow rate of acetylene by analyzing the performance and emission characteristics of the acetylene fuelled diesel engine at different loads and finally, the obtained results were compared with the neat diesel. The acetylene was inducted at a different gas flow rate of 2 LPM, 3 LPM, and 5 LPM. The results show that when acetylene induction takes place at 2 LPM, the brake thermal efficiency (BTE) increases by 1.4 % at full load during dual fuel mode compared to neat diesel. Brake specific energy consumption (BSEC) increases during acetylene induction whereas carbon monoxide, hydrocarbon, and smoke decrease particularly at medium to high engine loads this may be due to homogenous charge mixture formation, leading to stable combustion. However, there is a slight increase in oxides of nitrogen emissions, which may be due to higher flame speed causing uncontrolled combustion at peak loads relative to baseline diesel.

Performance and Emission Characteristics of CI Engine Fuelled with Jatropha and Pongamia Biodiesel along with Alumina Nano particles

2020 ◽  
Vol 12 (3) ◽  
Author(s):  
Balaji Selvaraj ◽  
Prabhu Subramaniam ◽  
Chinnasamy Chenniyapan ◽  
Prakash Thangavel
Keyword(s):  
Nano Particles ◽  
Emission Characteristics ◽  
Nano Particle ◽  
X Ray Diffraction ◽  
Compression Ignition Engine ◽  
Brake Thermal Efficiency ◽  
Performance And Emission ◽  
Unburned Hydrocarbon ◽  
Mass Fractions ◽  
Ci Engine

In this study an experimental investigation has been carried out on compression ignition engine to understand the engine behaviour like its performance and emission characteristics while using Aluminium oxide (Al2O3) nano particle as additive with a blend of diesel and biodiesel sourced from Jatropha and Pongamia vegetable oil. The Alumina nano particles are characterized by X- ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analysis. The biodiesel is made engine ready with adoptable properties by carrying out standard alkali transesterification process. The alumina nano particles are blended with jatropha in the mass fractions of 50, 100, 150 ppm and with Pongamia biodiesel in the mass fractions of 40, 60 ppm using an ultrasonicator. The experiments are carried out in single cylinder four stroke variable compression ratio diesel engine by varying the load using eddy current dynamometer. The experimental results reveal that there is a significant improvement in the performance characteristics like brake thermal efficiency (BTHE) and brake specific fuel consumption (BSFC) and reduction in the emission constituents like carbon monoxide (CO) and unburned hydrocarbon (HC) but in turn increase in nitric oxide (NOx) emissions were observed.

scholarly journals Emission from Compression Ignition Engine using Biogas Blends with Diesel as a Fuel

2019 ◽  
Vol 9 (2) ◽  
pp. 1536-1538
Keyword(s):  
Experimental Investigation ◽  
Energy Demand ◽  
The Other ◽  
Emission Characteristics ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Brake Thermal Efficiency ◽  
Performance And Emission ◽  
Ci Engine ◽  
Smoke Opacity

A study on performance and emission of compression ignition (CI) engine has been made by utilizing biogas blends at different loads. The flow rate of biogas with air was important parameter to get the desired results. The blend of 30% with diesel was optimum which yielded optimum emission characteristics. Higher specific fuel consumption and lower brake thermal efficiency was observed when the proportion of biogas mixes with diesel in comparison with neat diesel. The out coming results from the experimental investigation exhibited reduction in NOx emission and smoke opacity. The other emissions hydrocarbon (HC) and carbon monoxide (CO) has been higher than diesel. The use of biogas as an alternative fuel in correct proportion with diesel can meet the energy demand on scarcity of conventional fuel.

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