scholarly journals Numerical Study on Nitrogen Oxide and Black Carbon Reduction of Marine Diesel Engines Using Emulsified Marine Diesel Oil

2019 ◽  
Vol 11 (22) ◽  
pp. 6347 ◽  
Author(s):  
Iksoo Choi ◽  
Changhee Lee
Keyword(s):  
Particulate Matter ◽  
Nitrogen Oxides ◽  
Nitrogen Oxide ◽  
Black Carbon ◽  
Combustion Temperature ◽  
Numerical Study ◽  
Reduction Rate ◽  
Diesel Oil ◽  
Carbon Reduction ◽  
Marine Diesel

In this study, the exhaust gas characteristics of marine diesel oil (MDO) and emulsion fuels, which are currently used to reduce nitrogen oxides and particulate matters emitted from ship engines, were investigated through experimental and numerical analyses. The moisture included in the emulsion fuel primarily promotes the atomization of fuel due to microexplosion, and lowers the combustion temperature due to the latent heat of evaporation from the evaporation of moisture, thus reducing nitrogen oxides and particulate matter. In the case of emulsion fuel containing a water content of 16%, the combustion temperature was lowered, and the reduction rate of nitrogen oxide and black carbon was about 60% and 15%, respectively. The proposed method is a combustion control technology that can reduce particulate matter as well as nitrogen oxides by using emulsion fuel.

scholarly journals Nitrogen Oxides and Particulate Matter from Marine Diesel Oil (MDO), Emulsified MDO, and Dimethyl Ether Fuels in Auxiliary Marine Engines

2020 ◽  
Vol 8 (5) ◽  
pp. 322
Author(s):  
Jinkyu Park ◽  
Iksoo Choi ◽  
Jungmo Oh ◽  
Changhee Lee
Keyword(s):  
Particulate Matter ◽  
Nitrogen Oxides ◽  
Dimethyl Ether ◽  
Diesel Oil ◽  
Low Carbon ◽  
Emulsified Fuel ◽  
Marine Vehicles ◽  
Marine Engines ◽  
Marine Diesel ◽  
Chamber Temperature

Exhaust gases from ships and automobiles have a significant impact on people and the environment. As a result, diesel engines used in land and marine vehicles are gradually being restricted, and low-carbon engines are under development. This study considers marine diesel oil (MDO) that is used in ships to meet the emission regulations required by the International Maritime Organization. This investigation explores the method and application technology for the reduction of nitrogen oxides (NOx) and particulate matter using emulsified fuel and mass-produced dimethyl ether (DME) fuel, which are analyzed. When comparing emulsified fuel and DME fuel to MDO, which is a ship oil, NOx are reduced by 20–45% and the particulate matter is reduced by 60–97%. When emulsified fuel containing moisture is used, the combustion chamber temperature is lowered due to the optimal expansion by moisture contained in the fuel. The particulate matter is also reduced. When DME fuel is used, it reduces the particulate matter by more than 97% in comparison with the existing MDO fuel and the emulsified fuel. The conditions are believed to be suitable for combustion and they can be satisfied by supplying oxygen during post-combustion.

scholarly journals Preliminary Numerical Study on Exhaust Emission Characteristics of Particulate Matters and Nitrogen Oxide in a Marine Engine for Marine Diesel Oil and Dimethyl Ether Fuel

2020 ◽  
Vol 8 (5) ◽  
pp. 316
Author(s):  
Jinkyu Park ◽  
Iksoo Choi ◽  
Jungmo Oh ◽  
Changhee Lee
Keyword(s):  
Nitrogen Oxide ◽  
Dimethyl Ether ◽  
Alternative Fuels ◽  
Numerical Study ◽  
Alternative Fuel ◽  
Diesel Oil ◽  
Injection System ◽  
Injection Timing ◽  
Marine Engine ◽  
Marine Diesel

As concerns regarding environmental pollution, energy security and future oil supply continue to grow, communities around the world are looking for non-petroleum-based alternative fuels along with advanced energy technologies (e.g., fuel cells) to increase energy use efficiency. Compared with the main alternative fuel candidates (e.g., methane, methanol, ethanol and Fischer–Tropsch fuels), dimethyl ether (DME) seems to have a significant potential to solve the aforementioned problems and can be used as a clean, high-efficiency compressed ignition fuel with reduced nitrogen oxide, sulphur oxide and particulate matter (PM) emissions. In this study, the results of experiments using a ship engine and numerical analysis were verified using AVL BOOST software. Based on these verifications, nitrogen oxide and PM reduction characteristics were numerically analysed by controlling the diameter and spraying time of the fuel nozzle, which is the fuel injection system of a marine engine. When DME fuel was used, nitrogen oxide and PM emissions were reduced by 40% and 90%, respectively, compared with marine diesel oil fuel. To prove the viability of DME as an alternative fuel, combustion and exhaust characteristics were analysed in accordance with injection timing and the variation of nozzle hole.

scholarly journals Emisja zanieczyszczeń przy zasilaniu silnika ZS olejem napędowym z domieszką bioetanolu

2013 ◽  
Vol 11 (2) ◽  
pp. 139-146
Author(s):  
Anna Matuszewska ◽  
Małgorzata Odziemkowska ◽  
Joanna Czarnocka
Keyword(s):  
Carbon Monoxide ◽  
Particulate Matter ◽  
Nitrogen Oxides ◽  
Diesel Oil ◽  
Particulate Matters ◽  
Chassis Dynamometer ◽  
Oxygen Compound ◽  
Dynamometer Test

Bioethanol is an oxygen compound added to gasoline. Research into the possibility of applying it to diesel oil is conducted. It is assumed that such fuel could help reduce the emission of gaseous and particulate matter in comparison with conventional fuels. This paper presents the results of the authors’ chassis dynamometer test for biofuel containing 15% bioethanol. Emissions of carbon monoxide (CO), nitrogen oxides (NOx), hydrocarbons (THC), and particulate matters (PM) were related to diesel oil emissions.

NUMERICAL STUDY ON NOX EMISSION REDUCTION MECHANISM OF HCCI MARINE DIESEL ENGINE FOR IMO TIER III EMISSION LIMITS

2021 ◽  
Vol 159 (A2) ◽  
Author(s):  
B Li ◽  
H T Gao
Keyword(s):  
Diesel Engine ◽  
Emission Reduction ◽  
Numerical Study ◽  
Combustion Process ◽  
Reduction Rate ◽  
Marine Diesel Engine ◽  
Oxides Of Nitrogen ◽  
Nox Formation ◽  
Marine Diesel ◽  
Main Component

With the advantages of ultra-low emissions of oxides of nitrogen (NOX) and high thermal efficiency, the homogeneous charge compression ignition (HCCI) mode applied to marine diesel engine is expected to be one of the technical solutions to meet the International Maritime Organization (IMO) MARPOL73/78 Convention-Annex VI Amendment Tier III requirement. According to the NOX chemical reaction mechanism, taking a marine diesel engine as the application object, the numerical study on the NOX formation characteristics of n-heptane for HCCI combustion process is performed. The results indicate that NO is usually the main component in the generation and emissions of NOX with the n-heptane HCCI mode. The combustor temperature plays more important role in the proportion of NO generation and emission. Compared with the experimental data of conventional marine diesel engine, the emission reduction rate of NOX can achieve an average of more than 95% in using HCCI technology.

scholarly journals Research of the Effectiveness of Selected Methods of Reducing Toxic Exhaust Emissions of Marine Diesel Engines

2020 ◽  
Vol 8 (6) ◽  
pp. 452 ◽  
Author(s):  
Kazimierz Witkowski
Keyword(s):  
Carbon Dioxide ◽  
Nitrogen Oxides ◽  
Fuel Injection ◽  
Diesel Oil ◽  
Toxic Compounds ◽  
International Convention ◽  
Legal Norms ◽  
Marine Diesel ◽  
Carbon Dioxide Co2 ◽  
The Impact

The article’s applications are very important, as it is only a dozen or so years since the current issues of protection of the atmosphere against emissions of toxic compounds from ships. The issue was discussed against the background of binding legal norms, including rules introduced by the IMO (International Maritime Organization) in the context of the MARPOL Convention (International Convention for the Prevention of Pollution from Ships), Annex VI, with the main goal to significantly strengthen the emission limits in light of technological improvements. Taking these standards into account, effective methods should be implemented to reduce toxic compounds’ emissions to the atmosphere, including nitrogen oxides NOx and carbon dioxide CO2. The purpose of the article was, based on the results of our own research, to indicate the impact of the effectiveness of selected methods on reducing the level of nitrogen oxides and carbon dioxide emitted by the marine engine. The laboratory tests were carried out with the use of the one-cylinder two stroke, crosshead supercharged diesel engine. Methods of reducing their emissions in the study were adopted, including supplying the engine with fuel mixtures of marine diesel oil (MDO) and rapeseed oil ester (RME)-(MDO/RME mixtures) and changing the fuel injection parameters and the advance angles of fuel injection. The supply of the engine during the tests and the mixtures of marine diesel oil (MDO) and rape oil esters (RMEs) caused a clear drop in emissions of nitrogen oxides and carbon dioxide, particularly for a higher engine load, as has been shown. The decrease of the injection advance angle unambiguously makes the NOx content in exhaust gas lower.

scholarly journals Comparison of NOx and Smoke Characteristics of Water-in-Oil Emulsion and Marine Diesel Oil in 400-kW Marine Generator Engine

Energies ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 228 ◽  
Author(s):  
Jungmo Oh ◽  
Myeonghwan Im ◽  
Seungjin Oh ◽  
Changhee Lee
Keyword(s):  
Nitrogen Oxides ◽  
Moisture Content ◽  
Combustion Chamber ◽  
Water Content ◽  
Diesel Oil ◽  
Exhaust Gas ◽  
Sulphur Compounds ◽  
Oil Emulsion ◽  
Marine Diesel ◽  
Water In Oil Emulsion

Currently, the exhaust gas of a ship is regulated for nitrogen oxides and sulphur compounds; however, there is no IMO regulation on smoke under discussion. This study investigated the reduction of exhaust gas through ship emulsion fuel, which can simultaneously reduce nitrogen oxides and smoke in ship engines before smoke regulations are established. The combustion and exhaust characteristics were investigated according to the moisture content of emulsion fuel using a 400-kW generator engine. As the water content of the emulsion and the temperature of the combustion chamber increase, micro explosion increases and the combustion period decreases. The nitrogen oxide and smoke from the emulsion fuel used in this study decreased by 7% and 75%, respectively. The nitrogen oxides and soot reductions obtained by the use of emulsion fuel were boosted by micro-explosion of water contained in the fuel during combustion.

Numerical Study on NOx Emission Reduction Mechanism of HCCI Marine Diesel Engine for IMO Tier III Emission Limits

2017 ◽  
Vol Vol 159 (A2) ◽  
Author(s):  
B Li ◽  
H T Gao
Keyword(s):  
Diesel Engine ◽  
Emission Reduction ◽  
Numerical Study ◽  
Combustion Process ◽  
Reduction Rate ◽  
Marine Diesel Engine ◽  
Oxides Of Nitrogen ◽  
Nox Formation ◽  
Marine Diesel ◽  
Main Component

With the advantages of ultra-low emissions of oxides of nitrogen (NOX) and high thermal efficiency, the homogeneous charge compression ignition (HCCI) mode applied to marine diesel engine is expected to be one of the technical solutions to meet the International Maritime Organization (IMO) MARPOL73/78 Convention-Annex VI Amendment Tier III requirement. According to the NOX chemical reaction mechanism, taking a marine diesel engine as the application object, the numerical study on the NOX formation characteristics of n-heptane for HCCI combustion process is performed. The results indicate that NO is usually the main component in the generation and emissions of NOX with the n-heptane HCCI mode. The combustor temperature plays more important role in the proportion of NO generation and emission. Compared with the experimental data of conventional marine diesel engine, the emission reduction rate of NOX can achieve an average of more than 95% in using HCCI technology.

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