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In this work we analyze the spectral emission of the flame emitted by burning biomass, of different species of wood such as Cypress, Fig, Olive and Pine. The analysis was carried out to distinguish the different species of wood sensing the compounds of Sodium and Potassium emitted at 582 nm and 780 nm. Also, a spectral analysis carried out for samples of wood at different contents of water. The results...
This article discusses about the impact of new emission limits for nitrogen oxides (NOx) emissions which will be effective from 2021 for large combustion plants (LCP) in the Czech Republic and discusses about possible ways and techniques to achieve these strict emission limits.
A mathematical simulation has been performed to investigate the energetic, combustion and environmental behavior of a mono cylinder, water cooled, four stroke DI diesel engine fuelled with diesel, diesel-ethanol (15% by volume) and diesel-methanol (15% by volume) blends. The results show that alcohol blending to diesel reduces the emissions of NOx, smoke opacity, specific PM and specific CO2. From...
In this present work focused on combination of two different biodiesel blends with diesel. The present study brings out an experiment of two bio diesels from jatropha oil (B20J), Mahua oil (B20M) and Dual biodiesel(B10M+B10J) they are blended with diesel. The effects of dual biodiesel works in engine and exhaust emissions were examined in a single cylinder, direct injection, air cooled and high speed...
In this study, the modeling of the effect of exhaust gas recirculation on Homogenous Charge Compression Ignition (HCCI) in Diesel Engine has been investigated. The efficiency and emission reduction of the engine were an important point of view from study charge compression ignition. Furthermore, the greater adoption of the diesel engine has been inhibited by the increasing public awareness on pollution...
The fluid motion in an internal combustion engine is induced during the induction process and later modified during the compression process. There are various methods to improve the efficiency of engine such as super charging, turbo charging, varying stroke length, varying injection pressure, fuel to air ratio, additional strokes per cycle and so on. Many of them require additional design (stroke...
Internal combustion engines play a key role in transportation and power generation sectors in which diesel engines occupy a prominent status. Reduction of exhaust emission in diesel engines is a difficult and challenging task without compromising the engine performance. Various parameters like injection timing, compression ratio, and injection pressure can be varied in order to attain the desired...
Energy producers are facing a challenging task in trying to monitor the energy conversion processes due to their complexity, nonlinear dynamics, and a large number of affecting factors. There are several methods available which can deal with multidimensionality and which could be used in industrial monitoring systems, but it seems that the methods used by the industry are not necessarily fully compatible...
The study was aimed at determining the influence of Micro-emulsified ethanol-diesel fuel on specific fuel consumption, heat release rate and emissions of engine. The engine tests were performed on a four-cylinder, water-cooled, natural aspirated diesel engine. Using E0 (neat diesel fuels), E6(S), E11(S) and E11(C). The result showed that thermal efficiency and exhaust emission (NOx and smoke) of micro-emulsified...
Generally it is seen that vegetable oil cannot be used directly in a direct injection diesel engine for long period of time. Long-term endurance tests can show serious problems in injector coking, ring sticking, gum formation, and thickening of lubricating oil. These problems are correlated to the high viscosity and non volatility of vegetable oils, which cause inadequate fuel atomization and incomplete...
The present study is based on the certain air cooled direct injection diesel engine to investigate the combustion characteristic, emission and fuel consumption when the certain diesel engine is fuelled with different ratio of biodiesel. The experiment results show that compare with diesel fuel, the ignition delay time and combustion duration are shortened with the higher combustion speed and cylinder...
The volumetric percents of CO, HC, NOX, CO2 and O2 from the exhaust of an EFI gasoLine engine were measured and analyzed under the working conditions of its cold-start, cold-acceleration-deceleration, warm-deceleration and warm-acceleration. The results show that: A large amount of HC and CO is emitted from the engine under cold-start condition. During this period, the catalytic converter doesn't...
Using the excess heat of exhaust gas to heat the water to vapor, by spraying the vapor into intake manifold to join combustion, the performance of vehicle diesel engine has been researChed. The experimental results demonstrate that the bsfc of experimental engine cannot be reduced markedly, the temperature of exhaust gas for experimental engine is lower than that of original engine, the torsion of...
The combustion process and emission characteristics in diesel engine mainly depend on the mixture formation in cylinder. Spray characteristic is an important factor which affects the mixture formation and combustion process. Further, nozzle hole cone angle of the fuel injector directly influence the spray characteristic. In this paper, flow evolution process, spray distribution, fuel/air ratio equivalence...
The semi-dried sewage sludge was combusted in a 1MW CFB furnace. The emission characteristics of CO, NO and N2O at different temperatures and excess air ratios were studied. The heavy metals distribution was also investigated. With 30% moisture content, the net heating value of sewage sludge is sufficient for auto-thermal combustion without supplementary fuel. The CO concentration in flue gas was...
The combusition and emission simulation models are established with a CFD software on a small non-road air cool DI Diesel Engine fueled with bio-diesel and diesel. The expriment cylinder pressure curves are used to verifies the validity of the models. The simulation results show that the start of combustion time is advance 0.9°CA and the end of combustion is advance 2.5°CA at the same injection advance...
Tests were performed with a light-vehicle diesel engine. Four representative operating conditions in 1600r/min speed have been considered. The influence of injection pressure, injection timing, and multiple injection strategies on the diesel engine emission characteristics and fuel consumption has been investigated. The results show that low NOx and soot emissions can be obtained in the condition...
High temperature combustion is a key during the pyrometallurgical recycling for electronic wastes. Former researches relating to thermal treatment concentrated on thermal decomposition during electronic wastes pyrolysis and oxidation, using e.g. thermogravimetric analysis (TGA) or lab-scale batch-feeding furnace. In the present research, a bench-scale incineration system was developed to study the...
The emissions characteristics of a diesel car fueled by biodiesel volume ratio of 10% (called BD10), which is the mixture of conventional diesel and waste oil based biodiesel, was carried out. And the emission characteristics of HC, CO, NOX and CO2 in different driving mode and different driving cycle in accordance with the “I” type test cycle of Chinese vehicle emission standard GB18352.3-2005 was...
A numerical simulation model based on the KIVA code was carried out for a DI diesel engine in-cylinder process. Two candidate chambers were compared with the original chamber to study their effects on combustion and emission characteristics. The results show that low emission was achieved in the chamber C with maximal bowl diameter and bowl depth. Compared with the original chamber, Soot and NOx of...
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