scholarly journals Diagnostics of emission condition of compression ignition engine in utilization of tested substance

2019 ◽  
Vol 302 ◽  
pp. 01022
Author(s):  
Ján Polerecký ◽  
Juraj Jablonický ◽  
Juraj Tulík ◽  
Ján Kosiba ◽  
Marcin Zastempowski ◽  
...  
Keyword(s):  
Measurement Methods ◽  
Motor Vehicles ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Exhaust Gases ◽  
Smoke Opacity

This paper focuses on the observation of a decrease in smoke opacity values in application of tested substance in selected vehicles with a compression ignition engine. The aim of the paper is to evaluate the ability of the tested substance to decrease the smoke opacity value in vehicles equipped with the compression ignition engine with mileage above 30,000 km. Measurements were carried out on the basis of determined measurement methods. From the results obtained in measurements on two vehicles, it can be concluded that the utilization of the tested substance led to a decrease in the smoke opacity value in both observed vehicles. The results of the experiment show further possibility for decreasing of emission production in exhaust gases of motor vehicles equipped with the compression ignition engine.

scholarly journals Performance and smoke opacity of compression-ignition engine using used-waste oil

2021 ◽  
pp. 101063
Author(s):  
Marwan Effendy ◽  
Arif Surono ◽  
Eqwar Saputra ◽  
Nurmuntaha Agung Nugraha
Keyword(s):  
Compression Ignition ◽  
Waste Oil ◽  
Compression Ignition Engine ◽  
Smoke Opacity

Discharge of Exhaust Gases in Two-Stroke Engines

1949 ◽  
Vol 161 (1) ◽  
pp. 98-120 ◽  
Author(s):  
J. H. Weaving
Keyword(s):  
Steady Flow ◽  
Practical Case ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Exhaust Gases ◽  
University Of Cambridge ◽  
Coefficient Of Discharge ◽  
Stroke Engine ◽  
Stroke Cycle

The paper points out that the two-stroke engine still has a field of great importance, i.e. the compression-ignition engine, and that, although the two-stroke cycle has been known for so long, the theory of the discharge of exhaust gases from the cylinder is still in doubt, and some of the generally accepted assumptions have been challenged in recent years, in particular by Kadenacy. A description is given of apparatus built at the Engineering Laboratories, University of Cambridge, to simulate the discharge portion of the cycle only. This apparatus utilizes the gases nitrogen and hydrogen under compression, these being respectively denser and less dense than exhaust gases. Experiments were made to ascertain whether the older theories were valid, and to investigate the claims of Kadenacy of supersonic discharge and resultant vacuum pressures in the cylinder. These tests demonstrated that the older theories, based on the assumption of steady flow and Bernoulli's theory, were substantiated, provided that modifications were made to the index of expansion and the coefficient of discharge. Finally, a simplified system is derived for the calculation of the size of exhaust ports or valves, and this system is applied to a practical case.

scholarly journals The Effect of Compression Ratio on Pollutant Emission of a Diesel Engine Fuelled with Nano Diesel

2018 ◽  
Vol 7 (4.19) ◽  
pp. 828
Author(s):  
Abdulkhodor Kathum Nassir ◽  
Haroun A. K. Shahad
Keyword(s):  
Particle Size ◽  
Compression Ratio ◽  
Combustion Temperature ◽  
Nano Particles ◽  
Pollutant Emission ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Co Concentration ◽  
Smoke Opacity ◽  
The Impact

This studying aims to examine the impact of compression ratio (CR) on the pollutants of a compression ignition engine (CIE) fuelled with Nano-diesel. Nano-particles of Al2O3 and TiO2 are used as additives to diesel fuel with particle size less 45 nm. The impact is tested for 25, 50, 100 and 150 ppm doses. Tests are performed at different loads and a speed of 1500 rpm. Three CR are used namely13.5, 15.5 and 17.5. Results illustrated the affects of CR on the emissions of CO, CO2, NOx, smoke opacity and UHC. Results showed  that CO concentration rises with increasing of CR for Al2O3. It is increased by 2.5, 4.9 and 15.3% for the three ratios at 100ppm and 25% load while at full load there is no much effect as a result of high combustion temperature. Negligible effect is noticed for TiO2.The concentration of CO2rises with increasing CR at all dozes but it is very clear with 150ppm and 25% load3.7, 4.1 and 4.8% for Al2O3. The effect of  TiO2 is higher than that of Al2O3. The results also, show that NOx concentration is increased and becomes 604, 651 and 698ppm for 13.5, 15.5 and 17.5 respectively for Al2O3 at 25ppm and 25% load. The impact of Al2O3 is more noticeable than that of TiO2.The smoke opacity is slightly affected by CR for Al2O3 and  TiO2 at all doses and 25% load. UHC decreases slightly from 79, 75 and 71 ppm for CR of 13.5, 15.5 and 17.5 respectively for Al2O3 at 25ppm and 25% load. UHC decreases from 68, 65 and 61 ppm for CR13.5, 15.5 and 17 respectively for TiO2 at 25ppm and 25% load.  

scholarly journals Experimental Analysis of Engine Performance and Exhaust Pollutant on a Single-Cylinder Diesel Engine Operated Using Moringa Oleifera Biodiesel

2021 ◽  
Vol 11 (15) ◽  
pp. 7071
Author(s):  
Manzoore Elahi M. Soudagar ◽  
Haris Mehmood Khan ◽  
T. M. Yunus Khan ◽  
Luqman Razzaq ◽  
Tahir Asif ◽  
...  
Keyword(s):  
High Speed ◽  
Moringa Oleifera ◽  
Engine Performance ◽  
Operating Conditions ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Performance And Emission ◽  
High Speed Diesel ◽  
Moringa Oleifera Oil ◽  
Smoke Opacity

In this investigation, biodiesel was produced from Moringa oleifera oil through a transesterification process at operating conditions including a reaction temperature of 60 °C, catalyst concentration of 1% wt., reaction time of 2 h, stirring speed of 1000 rpm and methanol to oil ratio of 8.50:1. Biodiesel blends, B10 and B20, were tested in a compression ignition engine, and the performance and emission characteristics were analyzed and compared with high-speed diesel. The engine was operated at full load conditions with engine speeds varying from 1000 rpm to 2400 rpm. All the performance and exhaust pollutants results were collected and analyzed. It was found that MOB10 produced lower BP (7.44%), BSFC (7.51%), and CO2 (7.7%). The MOB10 also reduced smoke opacity (24%) and HC (10.27%). Compared to diesel, MOB10 also increased CO (2.5%) and NOx (9%) emissions.

scholarly journals A study of hydrogen fuel impact on compression ignition engine performance

2018 ◽  
Vol 234 ◽  
pp. 03001 ◽  
Author(s):  
Evgeni Dimitrov ◽  
Boyko Gigov ◽  
Spas Pantchev ◽  
Philip Michaylov ◽  
Mihail Peychev
Keyword(s):  
Carbon Dioxide ◽  
Nitrogen Oxides ◽  
Fuel Consumption ◽  
Diesel Fuel ◽  
Carbon Dioxide Concentration ◽  
Hydrogen Gas ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Exhaust Gases ◽  
The Impact

In this paper, a dual-fuel compression ignition engine test bench is presented. In hydrogen-diesel fuel co-combustion conditions, the engine parameters are determined – performance: effective torque, effective power and mean effective pressure; fuel economy: fuel consumption and specific fuel consumption; toxicity: carbon monoxide, carbon dioxide, nitrogen oxides, hydrocarbons, and smoke emissions (opacity). The impact of hydrogen-diesel fuel mass ratio on the performance, toxicity and economy of the engine is studied by obtaining a series of hydrogen-diesel fuel ratio variation characteristics at constant engine speed and load. Improvement of the economical parameters of the engine and reduction of carbon dioxide concentration in exhaust gases is detected under operation with hydrogen gas fuel. Significant reduction of the exhaust gases opacity is observed. It is not clear what the impact of the quantity of hydrogen, injected in the engine, on the concentration of nitrogen oxides in the exhaust gases is.

scholarly journals Performance and Emission Profile of Micro-Algal Biodiesel in Compression Ignition Engine

2017 ◽  
Vol 30 ◽  
pp. 110-124 ◽  
Author(s):  
Andrew C. Eloka-Eboka ◽  
Freddie L. Inambao
Keyword(s):  
Algal Species ◽  
Growth Potential ◽  
Biodiesel Production ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Complete Combustion ◽  
Performance And Emission ◽  
Emission Profile ◽  
Algal Biodiesel ◽  
Smoke Opacity

Micro-algae are a large and diverse group of simple typically autotrophic organisms which have the potential to produce greater amounts of non-polar lipids and biomass than most terrestrial biodiesel feedstocks. Having emerged as one of the most promising sources for biodiesel production, they are gaining research interests in the current energy scenario due to their phenomenal growth potential (< 21 days log phase) in addition to relatively high lipids production which are also excellent source of biodiesel. In this study, engine performance and emission profile was performed using biodiesel fuels and blends from micro-algal technology in a compression ignition engine. The technology of micro-algae involved open pond cultivation and the use of photo-bioreactor model BF-115 Bioflo/celli Gen made in the US of 14 litre capacity (200 Lux light intensity) and flowrate of 2.5L/min. The micro-algal species used were Chlorella vulgaris and Scenedesmus spp. The biodiesel produced were blended with conventional diesel (AGO) at different proportions. The performance parameters evaluated include: engine power, torque, brake specific fuel consumption (BSFC), smoke opacity, thermal gravimetry, thermal efficiency, exhaust gas temperatures and lubricity while the varying effects of emission pollutants during combustion were also studied. Results showed that viscosity, density and lubricity have significant effects on engine output power and torque than when throttled with AGO which was used as control. Combustion efficiency and emission profile were better than the AGO due to the oxygenated nature of the micro-algal biodiesel which brought about complete combustion. A striking deduction arrived is that oxygen content of the algal biodiesel had direct influence on smoke opacity and emissions in the engine and also thermo-gravimetrically stable for other thermal applications. The engine tests (BSFC, BTE, ThE, MechE, EGT) and overall emissions (CO2, CO, VOCs, HC, SOx, NOx) were within acceptable limits and comparable with AGO. The implication of the study is that Micro-algal technology is feasible and can revolutionise development in biodiesel industry.

scholarly journals EXPERIMENTAL INVESTIGATION ON AN EXHAUST EMISSION CHARACTERISTICS OF A COMPRESSION IGNITION ENGINE FUELED WITH DIESEL-WATER EMULSION

2021 ◽  
Vol 21 (1) ◽  
pp. 35-45
Author(s):  
Abdulrahman Shakir Mahmood ◽  
Haqi I. Qatta ◽  
Saadi M. D. Al-Nuzal
Keyword(s):  
Diesel Fuel ◽  
Tween 20 ◽  
Water Volume ◽  
Exhaust Emission ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Gas Emissions ◽  
Water Emulsion ◽  
Ci Engine ◽  
Smoke Opacity

One of the main sources of global air pollution is the undesirable gas emissions from diesel engines, as well as the accompanied particulate matters (PM). Consequently, the reduction of their amount and quality is highly recommended for clean environment. The present work includes an attempt to use diesel-water emulsion as a fuel on compression ignition (CI) engine emissions and to investigate its effect on these hurtful discharges. For this reason, tests are carried out on a single cylinder, 4-stroke CI engine with steady speed (1500 rpm) and different loads (0-100 %) operated with various proportions of diesel-water emulsions and compared it to the diesel fuel. Four samples of diesel-water emulsions are prepared at ratios of (5, 10, 15 and 20 %) by water volume in diesel and with help of Tween 20 and Oleic Acid as a surfactant to maintain its stability for long periods of time. Gas emissions of the engine are recorded for CO2, CO, HC, and NOX using an exhaust gas analyzer and smoke opacity using a device of smoke meter. Results reveal that the diesel-water emulsion significantly decreases the NOX emissions and smoke opacity. The highest reduction ratio for NOX and smoke opacity are found in case of fuel emulsion DW20, with values of 32.5 % and 39 % respectively, in comparison with that of diesel fuel.

scholarly journals Chemical Characterization of Exhaust Gases from Compression Ignition Engine Fuelled with Various Biofuels

2017 ◽  
Vol 26 (3) ◽  
pp. 1183-1190 ◽  
Author(s):  
Małgorzata Odziemkowska ◽  
Joanna Czarnocka ◽  
Andrzej Frankiewicz ◽  
Małgorzata Szewczyńska ◽  
Anna Lankoff ◽  
...  
Keyword(s):  
Chemical Characterization ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Exhaust Gases

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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