A Study on the Installation of SCR System for Generator Diesel Engine of Existing Ship

Ryu, Younghyun; Kim, Hong-Ryeol; Cho, Gyubaek; Kim, Hongsuk; Nam, Jeong-Gil

doi:10.5916/jkosme.2015.39.4.412

Cited by 9 publications

(8 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study, the same SCR system used in the previous study by Ryu et al 15 was utilized, and only the sheet thickness of the metal catalyst and the maintenance door of the reactor were changed. Figures 2 and 3 show the diagrams of the generator engine before ( Figure 2) and after ( Figure 3) the installation of the SCR system, which was introduced in Ryu et al; 15 the sailing ship's generator engine exhaust gas pipelines were modified for the installation of the SCR system. In this study, in order to reduce the backpressure of the engine, the sheet thickness of the existing metal catalyst was reduced.…”

Section: Experimental Apparatus and Methodsmentioning

confidence: 99%

“…Aiming to satisfy the nitrogen oxides (NOx) regulations of marine diesel engines, some studies have examined exhaust gas after-treatment systems. [10][11][12][13][14][15] Presently, to reduce NOx emissions from large marine diesel engines, two methods are used most frequently: selective catalytic reduction (SCR) and exhaust gas recirculation (EGR) systems. EGR supplies engine exhaust gas inside the engine cylinder and reduces NOx output by lowering the combustion temperature inside the cylinder.…”

Section: Introductionmentioning

confidence: 99%

“…Ryu et al 15 have published previously regarding their experimentation on Mokpo National Maritime University's training ship, T/S SAENURI of the Republic of Korea: a ship that is still in operational use. With the aim of reducing NOx by installing a urea-SCR system, the authors modified the exhaust gas pipeline of the NO.…”

Section: Introductionmentioning

confidence: 99%

“…2 generator diesel engine. Ryu et al 15 introduced procedures for installing a urea-SCR system on a generator diesel engine without an SCR system of existing ship and then experimented with both automatic and manual systems at various engine loads. However, because an SCR system is installed in the engine exhaust gas system, it can create backpressure in the engine exhaust gas pipeline, increasing engine exhaust gas pressure and in turn reducing both engine power and SFOC.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Installation and characteristics of urea-selective catalytic reduction systems for nitrogen oxide reduction in marine diesel engine

Ryu

Kim

Cho³

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part M:

Self Cite

View full text Add to dashboard Cite

Since 1 January 2016, the International Maritime Organization Tier III regulations concerning nitrogen oxides took effect. International Maritime Organization Tier III targets new ships weighing over 400 ton engaged in international sailing, especially those entering and leaving emission control areas. The number of emission control areas, including sulfur emission control areas, is forecasted to increase in Japanese seas and elsewhere; thus, all new ships intended for international sailing purposes must consider appropriate responses to these regulations. Currently, urea-selective catalytic reduction systems are frequently used to satisfy International Maritime Organization Tier III regulations in marine diesel engines, but these decrease ship engine performance due to increased engine exhaust gas pressure. Thus, following a study by Ryu et al., this research compares engine exhaust gas pressures at different engine loads (25%, 30%, 35%, 40%, 45%, and 50%) with the application of a thinner metal catalyst to a selective catalytic reduction reactor; metal catalyst thickness was reduced by 30% or more from the original sheet thickness of 0.1 t. Furthermore, 40% urea was injected into the exhaust gas line to conduct a comparative analysis of nitrogen oxide reduction. By changing the metal catalyst's sheet thickness, nitrogen oxide was reduced by more than 80%, while the engine exhaust gas pressure was lowered by approximately 13%-28%.

show abstract

Section: Experimental Apparatus and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Installation and characteristics of urea-selective catalytic reduction systems for nitrogen oxide reduction in marine diesel engine

Ryu

Kim

Cho³

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part M:

Self Cite

View full text Add to dashboard Cite

show abstract

“…It has also been installed in many ships. Ryu et al [20] reported the installation of SCR to reduce NOx emissions from ships to meet the IMO MEPC Tier 3 regulations. Although there are regulations on the particulate matter (PM) emissions of automotive diesel engines, there are no such regulations for marine diesel engines yet.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Emission Characteristics with a Wet-Type Exhaust Gas Cleaning System for Marine Diesel Engine Application

Ryu

Kim

et al. 2020

JMSE

Self Cite

View full text Add to dashboard Cite

Global air pollution regulations are becoming stricter for large diesel engines powering automobiles and ships. In the automotive sector, Euro 4 regulations came into force in January 2013 in accordance with European Union (EU) emission standards for heavy-duty diesel engines and are based on steady-state testing. In the marine sector, the International Maritime Organization(IMO) Maritime Environment Protection Committee(MEPC) is a group of experts who discuss all problems related to the prevention and control of marine pollution from ships, such as efforts to reduce ozone-depleting substances and greenhouse gas emissions. To reduce the harmful emissions from marine diesel engines, a wet-type exhaust gas cleaning system was developed in this study. As a test, seawater, electrolyzed water, and sodium hydroxide were sequentially injected into the exhaust gas. SO2 was reduced by 98.7–99.6% with seawater injection, NOx by 43.2–48.9% with electrolyzed water injection, and CO2 by 28.0–33.3% with sodium hydroxide injection.

show abstract

Formulation and Solution of Maritime Grids Optimization

Fang

Wang

2021

Optimization-Based Energy Management for Multi-Energy Maritime Grids

View full text Add to dashboard Cite

As a special energy system, the optimization of maritime grids can be considered as three levels similar to conventional land-based energy systems [1][2][3].(1) Synthesis optimization. Synthesis is defined as the components used in the maritime grids and their connections. Via synthesis optimization, the optimal configuration of the maritime grids can be determined. For example, the ship hull design, electrical layout, and whether to integrate a component or not. Since the synthesis optimization answers the "Yes-or-No" questions and therefore involves certain binary decision variables.(2) Design optimization or planning optimization. Design optimization is to determine the technical characteristics of components which are determined in synthesis optimization, such as the capacity and rated power. The difference between synthesis optimization and design optimization can be given by the well-known "siting and sizing" problems. The "siting problem" determines which type of components can be used and where to install them, which belongs to the synthesis optimization. Then the "sizing problem" determines the capacities of the installed components, which belongs to the design optimization.In power system research, design optimization is often named as planning optimization.(3) Operation optimization. After the synthesis optimization and design optimization, the operation optimization determines the optimal operating states of each component under specified conditions. Taken the navigation speed as an example. The synthesis optimization determines the type of main engine and the design optimization determines the capacity of the main engine, then operation optimization determines the optimal loading levels to address different navigation scenarios, such as different wave and wind scenarios.

show abstract

A Study on the Installation of SCR System for Generator Diesel Engine of Existing Ship

Cited by 9 publications

References 4 publications

Installation and characteristics of urea-selective catalytic reduction systems for nitrogen oxide reduction in marine diesel engine

Installation and characteristics of urea-selective catalytic reduction systems for nitrogen oxide reduction in marine diesel engine

Investigation on the Emission Characteristics with a Wet-Type Exhaust Gas Cleaning System for Marine Diesel Engine Application

Formulation and Solution of Maritime Grids Optimization

Contact Info

Product

Resources

About