scholarly journals Optimization of the Performance of Marine Diesel Engines to Minimize the Formation of SOx Emissions

2020 ◽  
Vol 19 (3) ◽  
pp. 473-484
Author(s):  
Mina Tadros ◽  
Manuel Ventura ◽  
C. Guedes Soares
Keyword(s):  
Fuel Consumption ◽  
Diesel Engines ◽  
Engine Speed ◽  
Exhaust Emissions ◽  
Polynomial Equations ◽  
Marine Fuel ◽  
Marine Engines ◽  
Marine Diesel ◽  
Marine Applications ◽  
Generate Polynomial

Abstract Optimization procedures are required to minimize the amount of fuel consumption and exhaust emissions from marine engines. This study discusses the procedures to optimize the performance of any marine engine implemented in a 0D/1D numerical model in order to achieve lower values of exhaust emissions. From that point, an extension of previous simulation researches is presented to calculate the amount of SOx emissions from two marine diesel engines along their load diagrams based on the percentage of sulfur in the marine fuel used. The variations of SOx emissions are computed in g/kW·h and in parts per million (ppm) as functions of the optimized parameters: brake specific fuel consumption and the amount of air-fuel ratio respectively. Then, a surrogate model-based response surface methodology is used to generate polynomial equations to estimate the amount of SOx emissions as functions of engine speed and load. These developed non-dimensional equations can be further used directly to assess the value of SOx emissions for different percentages of sulfur of the selected or similar engines to be used in different marine applications.

scholarly journals Contributions to the study of service characteristics of marine fuels

2018 ◽  
Vol XIX (1) ◽  
pp. 502-508
Author(s):  
Ali L
Keyword(s):  
Fuel Consumption ◽  
International Organizations ◽  
Diesel Engines ◽  
Fuel Injection ◽  
Cylinder Liner ◽  
Operating Mode ◽  
Service Characteristics ◽  
Marine Engines ◽  
Marine Diesel ◽  
A Priority

Since the beginning, development of marine diesel engines was turned towards obtaining a low fuel consumption and the result has reflected in engines construction: increased bore and cylinder liner diameter, higher working pressures and lower piston speeds. Similar improvements have taken place in the supercharging system, innovative fuel injection technologies and changes in combustion pressures. Nowadays, the trend of development has changed, the concept of reducing NOx and SOx emissions became a priority in order to meet the limits imposed by international organizations. As a consequence, a series of changes in operating mode of marine engines was noticed but also several innovations appeared in the construction and development of marine engines.

scholarly journals PENGARUH PENGGUNAAN ENERGI TERBARUKAN BUTANOL TERHADAP PENURUNAN EMISI JELAGA MESIN DIESEL INJEKSI LANGSUNG BERBAHAN BAKAR BIODIESEL CAMPURAN SOLAR DAN JATROPA

Infotekmesin ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 18-22
Author(s):  
Syarifudin Syarifudin ◽  
Syaiful Syaiful
Keyword(s):  
Fuel Consumption ◽  
Diesel Engines ◽  
Driving Forces ◽  
Direct Injection ◽  
Fuel Efficiency ◽  
Cetane Number ◽  
Calorific Value ◽  
Exhaust Emissions ◽  
High Viscosity ◽  
High Oxygen Content

Diesel engines are widely used as driving forces in vehicles and industry due to fuel efficiency and high output power. The wide use of diesel engines triggers an increase in fuel consumption and exhaust emissions that are harmful to health. Jatropha is a renewable fuel as a solution to increase fuel consumption. However, the high viscosity and low calorific value result in reduced performance and increased exhaust emissions. Butanol has a high oxygen content and cetane number and low viscosity compared to diesel and jatropha. Addition of butanol is possible to reduce the decrease in performance and exhaust emissions of diesel engines. this study evaluates the effect of butanol on reducing Isuzu 4JB1 diesel engine direct injection emissions. Percentage of blend used 70/30/0, 65/30/5, 60/30/10, and 55/40/15 based on volume. Tests are carried out at 2500 constant turns with a loading of 25% to 100% using the EGR system. The experimental results showed the presence of butanol caused a decrease in soot emissions produced by diesel engines

scholarly journals STATE AND PROSPECTS OF SHIP ENGINE-BUILDING IN RUSSIA

2017 ◽  
pp. 40-53
Author(s):  
Oleg Konstantinovich Bezjukov ◽  
Vladimir Anatoljevich Zhukov
Keyword(s):  
Russian Federation ◽  
Diesel Engines ◽  
Power Plants ◽  
Rotational Velocity ◽  
Import Substitution ◽  
Current State ◽  
Marine Engines ◽  
Marine Diesel ◽  
The Russian Federation ◽  
The Government

The course of the government of the Russian Federation for the development of the sea and river fleet is determined by a number of Federal target programs. These programs provide for the modernization of the composition of the sea, river and fishing fleet. The article provides analysis of the current state of the civil fleet of the Russian Federation, as well as an overview of engines that are part of the power plants of the vessels in service. There are considered prospects for the development of shipbuilding in Russia on the basis of plans for construction of different purpose vessels. Achieving the goal set by the fovernment should be ensured taking into account the policy of import substitution of the most important elements of sea and river technology. The authors state that the solution of the tasks is impossible without the development of ship propulsion engineering in Russia. The article presents the review of engine-building enterprises of the Russian Federation and products manufactured by them, most attention being given to engine rotational velocity and output. The authors give a comparative analysis to diesel engines produced in Russia and engines of leading foreign manufacturers, which is based on main technical and economic parameters, such as specific effective fuel consumption, average effective pressure, specific gravity, etc. The results of analysis helped to establish the most promising domestic manufacturers of diesel engines capable to compete with foreign manufacturers of marine diesel engines. The article shows the prospects of converting versatile engines produced at domestic enterprises into marine engines, with appropriate modernization of their systems and use of domestic components in their design which meet modern requirements. The article shows the most promising engines of Russian manufacturers, their technical and economic characteristics, which ensure competitiveness; gives the dimensions of advanced engines. The article contains recommendations for ensuring the developing and production of competitive marine engines intended for sea, fishing and river fleets in the Russian Federation.

Exhaust Emissions and Fuel Consumption of a Railpower RP20BD Switcher Locomotive

2009 ◽  
Author(s):  
Randell L. Honc ◽  
Steven G. Fritz ◽  
Dustin T. Osborne ◽  
Richard Grisier ◽  
Scott Carpenter
Keyword(s):  
North America ◽  
Power Systems ◽  
Fuel Consumption ◽  
Diesel Engines ◽  
Exhaust Emissions ◽  
Tier 2 ◽  
Ultra Low Sulfur Diesel ◽  
The Future ◽  
Generator Sets ◽  
Low Sulfur

Conventional switcher or shunting locomotives in North America are powered by a single 12 or 16 cylinder engine which operate at eight distinct power levels, plus idle. Recently introduced locomotive power systems utilize multiple smaller displacement non-road diesel engines packaged as individual generator sets to obtain a cleaner and more efficient locomotive. This paper examines exhaust emissions and fuel consumption of a Railpower RP20BD switcher locomotive utilizing three 375 kWe generators. FTP tests, described in part 92 of the CFR Title 40, were completed for UPY2606 using two fuels: EPA certification diesel, and ultra-low sulfur diesel. The locomotive produced emissions well below EPA Tier 2 limits using certification fuel, and subsequent testing with ULSD further reduced emissions to below the future EPA Tier 2 and 3 limits.

An Experimental Study on Fuel Economy Improvement of a Marine Diesel Engine Using a Sequential Turbocharging System

2018 ◽  
Author(s):  
Hechun Wang ◽  
Xiannan Li ◽  
Yinyan Wang ◽  
Hailin Li
Keyword(s):  
Diesel Engine ◽  
Fuel Economy ◽  
Diesel Engines ◽  
Engine Speed ◽  
Single Stage ◽  
Marine Diesel Engine ◽  
Nox Emissions ◽  
Engine Operation ◽  
Marine Diesel ◽  
High Torque

Marine diesel engines usually operate on a highly boosted intake pressure. The reciprocating feature of diesel engines and the continuous flow operation characteristics of the turbocharger (TC) make the matching between the turbocharger and diesel engine very challenging. Sequential turbocharging (STC) technology is recognized as an effective approach in improving the fuel economy and exhaust emissions especially at low speed and high torque when a single stage turbocharger is not able to boost the intake air to the pressure needed. The application of STC technology also extends engine operation toward a wider range than that using a single-stage turbocharger. This research experimentally investigated the potential of a STC system in improving the performance of a TBD234V12 model marine diesel engine originally designed to operate on a single-stage turbocharger. The STC system examined consisted of a small (S) turbocharger and a large (L) turbocharger which were installed in parallel. Such a system can operate on three boosting modes noted as 1TC-S, 1TC-L and 2TC. A rule-based control algorithm was developed to smoothly switch the STC operation mode using engine speed and load as references. The potential of the STC system in improving the performance of this engine was experimentally examined over a wide range of engine speed and load. When operated at the standard propeller propulsion cycle, the application of the STC system reduced the brake specific fuel consumption (BSFC) by 3.12% averagely. The average of the exhaust temperature before turbine was decreased by 50°C. The soot and oxides of nitrogen (NOx) emissions were reduced respectively. The examination of the engine performance over an entire engine speed and torque range demonstrated the super performance of the STC system in extending the engine operation toward the high torque at low speed (900 to 1200 RPM) while further improving the fuel economy as expected. The engine maximum torque at 900 rpm was increased from 1680Nm to 2361 Nm (40.5%). The average BSFC over entire working area was improved by 7.4%. The BSFC at low load and high torque was significantly decreased. The application of the STC system also decreased the average NOx emissions by 31.5% when examined on the propeller propulsion cycle.

Impact of Nitrogen Oxides Emission Reduction Methods on Specific Fuel Consumption of Marine Diesel Engines

2021 ◽  
Vol 23 ◽  
pp. 279-289
Author(s):  
Jerzy Herdzik
Keyword(s):  
Nitrogen Oxides ◽  
Fuel Consumption ◽  
Diesel Engines ◽  
Emission Reduction ◽  
Specific Fuel Consumption ◽  
Marine Diesel ◽  
Reduction Methods ◽  
The One ◽  
Tier 3 ◽  
The Cost

The paper has been presented the methods of nitrogen oxides emission reduction to fulfill the Tier 2 and Tier 3 requirements of the Annex VI of MARPOL Convention. It has been shown the development of marine two-stroke diesel engines and the change of nitrogen oxides emission from 1960 to 2000 and later up to 2020 after the implementation of NOx emission reduction methods. Specific fuel consumption before 2000, and as a prediction and given data in the manufacturers manuals for Tier 3 engines up to 2020, and as only a prediction up to 2030 has been analyzed and elaborated. Impact of nitrogen oxides reduction methods on the specific fuel consumption of the marine diesel engine has been evaluated. Additional emission of some gases to the atmosphere due to the implementation of reduction methods has been determined. EGR and SCR systems have got a lot of imperfections: required to install additional reduction systems (investment cost, required volume in the engine room), need maintenance and operation costs, produced wastes during treatment process. The estimated additional cost is about 0.8 USD/MWh of produced energy, taking into account only the cost of excessive used fuel. The whole increased cost may reach the level two-three times more due to cleaning systems investment costs, their operational cost and waste disposal. It has been the one of the reasons of worsening the transport effectiveness and competitiveness.

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