Particulate Emissions From a Two-Stroke Marine Diesel Engine Operated With Heavy Fuel Oil

2002 ◽  
Author(s):  
Tatsuro Tsukamoto ◽  
Kenji Ohe ◽  
Hiroshi Okada
Keyword(s):  
Diesel Engine ◽  
Sulfur Content ◽  
Diesel Oil ◽  
Fuel Oil ◽  
Particulate Emissions ◽  
Marine Diesel Engine ◽  
Heavy Fuel Oil ◽  
Particulate Emission ◽  
Marine Diesel ◽  
Test Engine

In these years, a problem of air pollution in a global scale becomes a matter of great concern. In such social situation, diesel engines are strongly required to reduce the NOx and particulate emission in the exhaust gas. In this paper, measurements of particulate emissions from a low speed two-stroke marine diesel engine were conducted with several kinds of diesel oil and a heavy fuel oil, to know the characteristics of particulate emissions at the present situation. The effects of engine load and sulfur content of the fuel on the particulate emission have been examined. The particulate emission from the test engine was measured by partial-flow dilution tunnel system, and particulate matter collected on the filter was divided into four components, SOF (soluble organic fraction), sulfate, bound water and dry soot, by Soxlet extraction and ion chromatograph. Results show that the particulate emission from the test engine operated with heavy fuel oil is three times as much as the value with diesel oil and that not only sulfate but SOF and dry soot concentration increase with the increase in fuel sulfur content. It is also found that the conversion rate from sulfur in fuel into sulfate in particulate matter is nearly independent of the sulfur content in the fuel and increases with the increase in the engine load.

scholarly journals Study on Improvement of Combustion at Start-up and at Heavy Fuel Oil Use in 4-Stroke Cycle Marine Diesel Engine

2014 ◽  
Vol 49 (5) ◽  
pp. 666-673
Author(s):  
Sumito Nishio ◽  
Dong-Hoon Yoo ◽  
Takeyuki Kishi ◽  
Tetsugo Fukuda ◽  
Zhide Xu
Keyword(s):  
Diesel Engine ◽  
Fuel Oil ◽  
Marine Diesel Engine ◽  
Heavy Fuel Oil ◽  
Start Up ◽  
Marine Diesel ◽  
Stroke Cycle

Maintaining Marine Diesel Emissions Using Performance Monitoring

2010 ◽  
Author(s):  
Herbert Roeser ◽  
Dilip Kalyankar
Keyword(s):  
Diesel Engine ◽  
Performance Monitoring ◽  
Fuel Oil ◽  
Exhaust Gas ◽  
Gas Emission ◽  
Heavy Fuel Oil ◽  
Tier Ii ◽  
Technological Advances ◽  
Exhaust Gas Emission ◽  
Marine Diesel

Ships are an integral part of modern commercial transport, leisure travel, and military system. A diesel engine was used for the first time for the propulsion of a ship sometime in the 1910s and has been the choice for propulsion and power generation, ever since. Since the first model used in ship propulsion, the diesel engine has come a long way with several technological advances. A diesel engine has a particularly high thermal efficiency. Added to it, the higher energy density of the diesel fuel compared to gasoline fuel makes it inherently, the most efficient internal combustion engine. The modern diesel engine also has a very unique ability to work with a variety of fuels like diesel, heavy fuel oil, biodiesel, vegetable oils, and several other crude oil distillates which is very important considering the shortage of petroleum fuels that we face today. In spite of being highly efficient and popular and in spite of all the technological advances, the issue of exhaust gas emissions has plagued a diesel engine. This issue has gained a lot of importance since 1990s when IMO, EU, and the EPA came up with the Tier I exhaust gas emission norms for the existing engine in order to reduce the NOx and SOx. Harsher Tier II and Tier III norms were later announced for newer engines. Diesel fuels commonly used in marine engines are a form of residual fuel, also know as Dregs or Heavy Fuel Oil and are essentially the by products of crude oil distillation process used to produce lighter petroleum fuels like marine distillate fuel and gasoline. They are cheaper than marine distillate fuels but are also high in nitrogen, sulfur and ash content. This greatly increases the NOx and SOx in the exhaust gas emission. Ship owners are trapped between the need to use residual fuels, due to cost of the large volume of fuel consumed, in order to keep the operation of their ships to a competitive level on one hand and on the other hand the need to satisfy the stringent pollution norms as established by the pollution control agencies worldwide. Newer marine diesel engines are being designed to meet the Tier II and Tier III norms wherever applicable but the existing diesel engine owners are still operating their engines with the danger of not meeting the applicable pollution norms worldwide. Here we make an effort to look at some of the measure that the existing marine diesel engine owners can take to reduce emissions and achieve at least levels prescribed in Tier I. Proper maintenance and upkeep of the engine components can be effectively used to reduce the exhaust gas emission. We introduced a pilot program on diesel engine performance monitoring in North America about two years ago and it has yielded quite satisfying results for several shipping companies and more and more ship owners are looking at the option of implementing this program on their ships.

scholarly journals Affections of Turbine Nozzle Cross-Sectional Area to the Marine Diesel Engine Working

Naše more ◽  
2021 ◽  
Vol 68 (2) ◽  
pp. 65-73
Author(s):  
Do Duc Luu ◽  
◽  
Nguyen Quang Vinh
Keyword(s):  
Diesel Engine ◽  
Cross Sectional Area ◽  
Fuel Oil ◽  
Marine Diesel Engine ◽  
Sectional Area ◽  
Oil Consumption ◽  
Cross Sectional ◽  
Exhaust Temperature ◽  
Working Cycle ◽  
Marine Diesel

After a long period of use, some important technical parameters of the main marine diesel engines (MDE) gradually become worse, such as the turbine speed, intake pressure, exhaust temperature, engine power, and specific fuel oil consumption (SFOC). This paper studies the affections of the turbine nozzle cross-sectional area (AT) to MDE and presents a method of AT adjustment to improve the performances of MDE. A mathematical model of an engine was built based on the existent engine construction and the theory of the diesel engine working cycle and the simulation was programmed by Matlab/Simulink. This simulation model accuracy was evaluated through the comparison of simulation results and experimental data of the MDE. The accuracy testing results were acceptable (within 5%). The influences of AT on the engine working parameters and the finding optimization point were conducted by using the simulation program to study. The predicted optimization point of the nozzle was used to improve the engine’s performances on board. The integration of the simulation and experiment studies showed its effectiveness in the practical application of the marine diesel engine field.

scholarly journals Model tests of a marine diesel engine powered by a fuel-alcohol mixture

2021 ◽  
Author(s):  
Marcin Zacharewicz ◽  
Tomasz Kniaziewicz
Keyword(s):  
Mathematical Model ◽  
Diesel Engine ◽  
Alternative Fuels ◽  
Fossil Fuels ◽  
Diesel Oil ◽  
Marine Diesel Engine ◽  
Engine Model ◽  
Marine Engines ◽  
Marine Diesel ◽  
The Mathematical Model

The paper presents the results of model and empirical tests conducted for a marine diesel engine fueled by a blend of n-butanol and diesel oil. The research were aimed at assessing the usefulness of the proprietary diesel engine model in conducting research on marine engines powered by alternative fuels to fossil fuels. The authors defined the measures of adequacy. On their basis, they assessed the adequacy of the mathematical model used. The analysis of the results of the conducted research showed that the developed mathematical model is sufficiently adequate. Therefore, both the mathematical model and the computer program based on it will be used in further work on supplying marine engines with mixtures of diesel oil and biocomponents.

scholarly journals Diagnosis for Fuel Oil Line for Marine Diesel Engine by Sense of Touch

1992 ◽  
Vol 27 (3) ◽  
pp. 262-265
Author(s):  
Takeshi Katagi ◽  
Tetsuo Naka ◽  
Takeshi Hashimoto
Keyword(s):  
Diesel Engine ◽  
Fuel Oil ◽  
Marine Diesel Engine ◽  
Marine Diesel ◽  
Sense Of Touch
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