Analysis of combustion and emission characteristics of a diesel engine fueled with alternative fuel by thermodynamic modeling (original) (raw)
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PERFORMANCE AND EMISSION ANALYSIS OF DIESEL
To overcome the future source of fuel. Many vegetable oils have been studied with C I engine by modification of oil (Biodiesel) in case of density/viscosity. The blend fuels of diesel with Karanja oil me (KME From the results, performance parameters were found to be very close to that of diesel fuel. The brake thermal efficiency and brake specific fuel consu blending ratios under certain loads. The emission characteristic levels of carbon dioxide, carbon monoxide, nitric oxide and hydrocarbons were found to be higher than pure diesel fuel. Copyright©2017, Venkateswara Rao. This is an open access article distributed under the Creative Commons Att distribution, and reproduction in any medium, provided the original work is properly cited.
This essay scrutinizes an experimental study conducted to appraise the influence of using n-Butanol with diesel fuel in 5% and 10% (volume) n-Butanol, 1% nitro methane (NM), injection timing and two Nano-particles (alumina and a type of silica powder) on the engine performance (brake specific fuel consumption and engine power), fuel properties (Cetane number and flash point) and exhaust emissions (soot, NO x and CO) of an engine with 4-cylinder (with a system of common rail fuel injection), intercool-ing, cooled exhaust gas recirculation (EGR), and turbocharged. The tests are conducted by varying the engine load (25 and 75 nm) and changing engine speed (1500 and 2200 rpm). Normal Butanol presents better brake specific fuel consumption (BSFC) but this blend doesn't reflect better engine power. All the percentages of n-Butanol in the fuel make Cetane number decrease but adding 1% of nitro methane makes Cetane number increase. For all the n-Butanol, the percentage flash makes the fuel decrease in comparison to pure diesel fuel. The current experimental study demonstrates that adding the n-Butanol and nitro methane to diesel fuel direct into diminishing soot emission. In contrast, this blend raises NO x and CO emissions. Furthermore, this research indicates that the increase of engine speed dwindle air pollutants and enhances BSFC. It also remarks that power gets increased at low engine speed. However, power gets reducedat high speed. This article represents that the increasing of engine load leads to increasing all of air pollutant, increasing of power and decreasing of brake specific fuel consumption. Both the Cetane number and flash point are independent from engine speed and engine load. The present paper shows that the effect of silica with high percentage of n-Butanol and high injection timing are better than other additives soot emissions which are getting decreased. Moreover, these additives along with low injection timing are more suitable for increasing the brake specific fuel consumption.
Fuel Processing Technology, 2018
The behaviors of a biofuel and a fossil fuel were evaluated by different techniques, namely thermal analysis (Thermogravimetry-TG and Differential Thermal Analysis-DTA) and engine performance tests. From TG and DTA curves, two decomposition phases were identified for diesel fuel with ignition temperature (IT) at 250°C and three phases for biodiesel fuel with IT at 300°C. Combining conversion (α) versus temperature and a modelfree kinetics method, the range of activation energies (E a) values were determined for both diesel (from 48.5 kJ mol −1 up to 61.0 kJ mol −1) and biodiesel (from 58.6 kJ mol −1 up to 55.0 kJ mol −1) fuels. At the initial phase of combustion, diesel fuel presents lower E a and IT than biodiesel fuel. At the final phase of combustion, an opposite behavior is observed. These results provide subsides to predict that the behavior of diesel-biodiesel blends is the best option due to the lowering of E a along the entire combustion process. As regards the engine tests, the B20 blend showed improvements compared with diesel fuel. In average, B20 presented increases of 1.2% in power, 1.0% in torque and 1.2% in thermal efficiency. In terms of soot, B20 presented 8.9% lower emissions than diesel fuel. Although thermal analysis and engine performance tests are executed under very different conditions, the results from both techniques showed the same trend, i.e., the best option for the combustion performance is a diesel-biodiesel blend.
The rapid depletion in world petroleum reserves and uncertainty in petroleum supply due to political and economical reasons along with the sharp escalation in the petroleum prices have simulated the search for alternatives to petroleum based fuels especially diesel and gasoline. Moreover, bulks of petroleum fuels are being consumed by agriculture and transport sector for which diesel engine happens to be the prime mover. Though there are wide varieties of alternative fuels available the research has not yet provided the right renewable fuel to replace diesel. Vegetable oil due to their properties being close to diesel fuel may be a promising alternative for diesel engines. Due to their high viscosity, they cannot be directly used in a diesel engine. Transesterification is one method by which viscosity could be drastically reduced and the fuel could be adopted for use in diesel engine. Present investigation focuses on use of Rice Bran Oil in Diesel engine. Performance and exhaust emission characteristics of the engine have been evaluated. Esterified Rice Bran Oil has exhibited performance very close to that of diesel fuel. In the present work it is observed that, the NOX and unburned hydrocarbon emission decreases and carbon monoxide, particulate emission and smoke intensity increases with the use of biodiesel in diesel engine. When compared to non-esterified Rice Bran Oil, esterified Rice Bran Oil emits less smoke and therefore be regarded as an environment friendly fuel.
ANALYSIS OF PERFORMANCE AND EMISSION CHARACTERISTICS OF A DIESEL ENGINE FUELLED WITH BIODIESEL
The rapid depletion in world petroleum reserves and uncertainty in petroleum supply due to political and economical reasons along with the sharp escalation in the petroleum prices have simulated the search for alternatives to petroleum based fuels especially diesel and gasoline. Moreover, bulks of petroleum fuels are being consumed by agriculture and transport sector for which diesel engine happens to be the prime mover. Though there are wide varieties of alternative fuels available the research has not yet provided the right renewable fuel to replace diesel. Vegetable oil due to their properties being close to diesel fuel may be a promising alternative for diesel engines. Due to their high viscosity, they cannot be directly used in a diesel engine. Transesterification is one method by which viscosity could be drastically reduced and the fuel could be adopted for use in diesel engine. Present investigation focuses on use of Rice Bran Oil in Diesel engine. Performance and exhaust emission characteristics of the engine have been evaluated. Esterified Rice Bran Oil has exhibited performance very close to that of diesel fuel. In the present work it is observed that, the NOX and unburned hydrocarbon emission decreases and carbon monoxide, particulate emission and smoke intensity increases with the use of biodiesel in diesel engine. When compared to non-esterified Rice Bran Oil, esterified Rice Bran Oil emits less smoke and therefore be regarded as an environment friendly fuel. R. Sundara Raman, Dr. G. Sankara Narayanan and Dr. N. Manoharan http://www.iaeme.com/IJMET/index.asp 67 editor@iaeme.com Cite this Article: R. Sundara Raman, Dr. G. Sankara Narayanan and Dr. N. Manoharan, Analysis of Performance and Emission Characteristics of A Diesel Engine Fuelled with Biodiesel, International Journal of Mechanical Engineering and Technology, 6(10), 2015, pp. 66-77. http://www.iaeme.com/currentissue.asp?JType=IJMET&VType=6&IType=10
2014
Environmental degradation and depletion of fossil fuel reserves are matters of great concern around the world. Diesel is one of the main transport fuel used in sector and India depends heavily on oil import. Recent concerns over the environment, increasing fuel prices and shortage of its supply have promoted the interest in development of the alternative sources for petroleum fuels. In present work we have conducting experiment of custard apple seed oil. performance , combustion and emission characteristics of single cylinder diesel engine using custard apple (Annona Squamosa) Seed biodiesel-diesel blends (20%, 40%, 60%, 80%, and 100%).These blends are used on the 5.2 kW diesel engine with constant speed at 1500 rpm and varying load conditions. The results shows that brake thermal efficiency of CA80 is equal to diesel compare to other blends, less exhaust gas temperature, specific fuel consumption is decreases in lower loads and at full load its equal to diesel .Almost overlapping p-θ diagram, heat release rate is same as that of diesel. Exhaust emissions like CO 2, HC and NOx are slightly increases and CO and smoke decreases.
Simulation model of the combustion processes of a diesel engine
It is foreseen that in the near future in Estonia there will be growth in the consumption of alternative liquid fuels in internal combustion engines. The main share of it will be formed by the local raw material based diesel fuel and ethanol. In connection with this, the choice of fuels and the variety of their qualitative characteristics in filling stations will grow. This kind of situation will give rise to the necessity of creating new quality assessment methods which should be reliable, efficient and economical. There may be several assessment methods for taking fuel samples. Drivers consider the fuel quality assessment express methods especially valuable. Working out a new method like that is at present also supported by the electronic control system of the engine and the use of digital diagnostic devices. Creating and implementing the fuel quality assessment express method requires a considerable amount of effort. It includes the evaluation and prognosis of the fuels physical ...
EMISSION CHARACTERISTICS OF A DIESEL ENGINE USING SOYABEAN OIL AND DIESEL BLENDS
Diesel engines have been playing a vital role in the transportation and power generation sectors since from its invention. Despite of having better efficiency with diesel engine, the main concern is on emission of pollutants. There are various methods to reduce pollutant emission from a diesel engine. The prominent way to reduce pollutants is the usages of bio fuels with some modifications in the diesel engine. Diesel engine simulation models can be used to understand the combustion performance, prediction of emission concentration. These models can reduce the number of experiments. In this study, the performance and emissions characteristics of single cylinder, four stroke, and direct injection diesel engine operating on diesel and soybean blends have been investigated theoretically. The variations of various species concentration like CO 2 ,CO and NO x with equivalence ratio have been analysed using diesel engine simulation models. These models can reduce the number of experiments. Computer simulation has contributed enormously towards new evaluation in the field of internal combustion engines. Mathematical tools have become very popular in recent years owing to the continuously increasing improvement in computational power.