Effects of SI Engine Operating Temperature Fuelled with Gasoline Ethanol Blends on Performance and Emissions Characteristics (original) (raw)
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Influences of Intake Temperature and Bio-Petrol Fuel Temperature on SI Engine: An Overview
Applied Mechanics and Materials, 2015
Bio-petrol has the potential to be used as an alternative fuel for spark ignition engine in order to introduce renewable fuel and to reduce the total CO 2 emissions. The present study converses the usability of ethanol as a clean and green renewable alternative fuel for spark ignition engine. This review paper emphasizes not only on the inherent properties of ethanol as a fuel but also elaborately reviews about the performance and emission characteristics of the engine considering the influences of different parameters like intake temperature and preheat bio-petrol fuel. The study reveals the understanding of the engine performance characteristics and emissions production under ethanol gas petrol blending ratio and variant types of ethanol. Furthermore, the fuel properties such as blends densities and kinematics viscosity found to increase continuously with increasing percentage of ethanol, while API gravity and heat value decreased with decreasing percentage of ethanol increase. In addition, cloud point and flash points for bio-petrol blends were found to be higher than standard gasoline fuel, while distillation curves were lower. In this paper, the performance and emission analysis carried out by different researchers from their experimental and theoretical results has been presented in brief. The review of the investigation reports found in the literature reveals that the intake temperature and preheat bio-petrol fuel have an influences on engine performance with ethanol as a blended fuel with gasoline.
The Effect of Engine Temperature on Multi Cylinder SI Engine Performance with Gasoline as a fuel
2014
This country is amongst the tropical countries where the deviation in the temperature is having very vast range. Looking in to this vast varying temperature range it is very difficult to say that which temperature is best suited for operating condition of engines and gives us best performance level as for as Thermal efficiency and brake power is concerned. In this work it tried to investigate the best option to run the S.I. engine. The development of engines with its complexity of in-cylinder processes requires modern development tools to exploit the full potential in order to reduce fuel consumption. A three cylinder, four stroke, petrol carburetor Maruti 800 engine connected to eddy current type dynamometer for loading was adopted to study engine power. The performance results that are reported include brake power and specific fuel consumption (sfc) as a function of engine temperature; i.e. 50, 60, 70, 80, and 90°C with varying engine speed of 1500, 1800, 2100 and 2400 rpm. The ef...
Influence of Fuel Temperature on a Diesel Engine Performance Operating with Biodiesel Blended
JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES, 2012
This paper is presented to study the effect of temperature using 5 % biodiesel blended on diesel engine performance. The one-dimensional numerical analysis of GT-Power software is used to simulate the commercial four cylinder diesel engine. The standard fuel data base of GT-Power does not contain any biodiesel. Therefore, the authors have measured typical physical properties of the fuel before it can be installed into the GT-Power data base. The diesel engine is simulated to study the characteristic of engine performance when the engine is operating with fuel blend as an alternative fuel. The simulations are conducted at full load condition where the temperature are varies from 300K to 500K. The simulation results show that the brake power and brake torque reduced maximum of 1.39 % and 1.13 % respectively for the engine operating with fuel blend at different temperatures. It was shown that the insignificant different is due to the small gap between energy content values. The decrease in the lower heating value caused an increase in the brake specific fuel consumption thus reduces the brake thermal efficiency of engine performance at full load.
Emission and Performance Test on Petrol Engine Using Fuel Modification
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Case Studies in Thermal Engineering, 2014
In this study, the effects of ethanol additives (5%, 10% and 15% in volume) on the performance and emissions (HCs, CO, CO 2 and NOx) of a SI two stroke engine is investigated in different loads and speeds. Also, the effect of exhaust temperature and delivery ratio on emissions and engine performance is discussed. Results show that in most test cases, when alcoholic fuel is used, scavenging efficiency and delivery ratio increased due to rapid evaporation of ethanol and outcomes of scavenging and trapping efficiencies are in more accordance with the perfect mixing model. The most outstanding result of using ethanol additives is significant reduction in pollutions emitted from engine of which CO with 35% reduction has the most reduction percentage among other pollutants. Although most emissions are increased by increasing the exhaust temperature, but hydrocarbons (HCs) on an average decreased by 30% on increasing the exhaust temperature.
2016
This country is amongst the tropical countries where the deviation in the temperature is having very vast range. Looking in to this vast varying temperature range it is very difficult to say that which temperature is best suited for operating condition of engines and gives us best performance level as for as Thermal efficiency and brake power is concerned. In this work it tried to investigate the best option to run the S.I. engine. The development of engines with its complexity of in-cylinder processes requires modern development tools to exploit the full potential in order to reduce fuel consumption. The performance results that are reported include brake power and specific fuel consumption (sfc) as a function of engine temperature; i.e. 50, 60, 70°C with varying engine speed of 1500, 1800, 2100 and 2400 rpm. The effect of increasing the temperature can have the multiple advantage of reducing the specific fuel consumption while on the other hand low head temperature will have good ...
2012
This paper presents a review of the use of ethanol in SI engine, its performance and emission characteristics based on the works of different researchers and scientist available in the literature. The advantages of using ethanol as SI engine fuel include its greenness, renewability, higher availability and usability in near future, higher octane number, higher volumetric efficiency, higher compression ratio and biodegradability. Ethanol can be produced biologically from sugarcane, crop residues, cellulose, agricultural biomass, municipal waste etc. The experiment conducted by different researchers and their experimental results shows that brake specific fuel consumption, brake torque, indicated power, thermal efficiency increases or decreases depending upon the operating condition of the engine and ethanol percentage in the ethanol-gasoline blends. However, the compression ratio always increases due to enhancement of the octane number of the blend. On the other hand volumetric effic...
The project is about studying the effect of using gasoline-ethanol (GE) blends on performance and exhaust emission on four stroke engine. The test was one done by fabricating the test rig which consists of four stroke single cylinder air cooled spark ignition (SI) engine and using various ratios of GE blends. Each experiment were conducted at (1/4) th (7kg) of maximum load and at different engine speeds ranging from 500 to 2000 rpm, without catalytic converter by varying Ethanol content from 5 percentages to 20 percentages by volume and different blends (E5, E10, E15, E20) were tested. Brake power, Brake specific fuel consumption and Brake thermal efficiency were calculated for various blends. The result showed by E15 was best among all in each of the four accelerator position due to increase in octane number causing complete combustion, lower stoichiometric ratio and greater anti-knocking properties of ethanol.
Effect of Ethanol Content on Thermal Efficiency of a Spark-Ignition Light-Duty Engine
ISRN Renewable Energy, 2012
The use of bioethanol in the transport sector can contribute to mitigate the greenhouse gas emissions of the vehicles. To achieve this goal, together with a positive energy balance in global productive process of ethanol (well to tank), it is important that adding ethanol to gasoline does not cause a worsening of the efficiency of the internal combustion engine (tank to wheel). In this paper, a research activity on a commercial spark-ignition light-duty engine at the test bench is reported. The aim of the work was to characterize the effect of different bioethanol/gasoline blends on engine behaviour. Blends until 85% of ethanol were tested. Comparative studies of combustion development of gasoline and gasoline/ethanol blends at different concentrations have been made through the analysis of pressure cycles in combustion chamber. Moreover, emissions were collected and analyzed. Emissions downstream of the catalyst, measured with the blends, resulted quite similarly to the gasoline ca...
The huge consumption of fossil fuels is directly affects the economy of our country as importing it from other countries so this may give scope for many researchers to find other alternatives to drag out the usage of petroleum. Thus, using bio-fuel as an alternative, the problem could be reduced. Also the transportation mainly depends on the fossil fuels particularly liquid fuels which are depleting at much faster rate than production. The transport vehicles also based on usage operated on 2-stroke and 4 –stroke engines. In present work both the test engines are considered for experimental study with approximately equal horse power and rated speed for comparative study, run with various blends of gasoline-ethanol and also evaluated using pure petrol fuel without any modification in a present engine. India is ranked second place in cultivating sugar cane, from which ethanol is produced and 99% purity ethanol is considered for the preparation of test fuels. Experiments were conducted using different blends of gasoline-ethanol such as E0 (Pure petrol), E20 (20% of ethanol in vol.based), E30 (30% of ethanol in vol.based), E40 (40% of ethanol in vol.based), and E50 (50% of ethanol in vol.based) and its effect on specific fuel consumption, break thermal efficiency and emissions with respect to the engine load taking pure petrol as datum. The results of experimental investigation were compared between 2-stroke and 4 –stroke engines. Results show that alternative fuel like ethanol blending with gasoline increases the thermal efficiency in 4-stroke engine, liberates less emission and also noticed the better combustion.