• Journal of Advanced Marine Engineering and Technology
• /
• v.23 no.4
• /
• pp.462-472
• /
• 1999

De-NOx facility using Selective Catalytic Reduction method is the most widely applied one that removes NOx from flue gas emitted from combustion facility such as boiler for power generation engine incinerator etc. Reductant $NH_3\;or\;NH_4OH$ is sprayed into flue gas to convert NOx into $H_2O$ and $N_2.$ Good mixing between flue gas and $NH_3$ is the most important factor to increase reduction in catalytic layer and to reduce unreacted NH3 slip. Therefore the development of mixer device for mixing effect is one of the important part for SCR facility. Objectives of this study are to investigate the relation between flow and concentration field by observation at the wake of delta-wing type mixer. At the first stage qualitative measurement of flow field is conducted by flow visualization using laser light sheet in lab. scale wind tunnel. Also we have conducted the quantitative analysis by comparing flow field measurement using LDV with numerical simulation. On the basis of qualitative and quantitative analysis we investigate the dis-tribution of flow and concentration in flow model facility. The results of an experimental and compu-tational examination of the vortex structures shed from delta wing type vortex generator having $40^{\circ}$ angle of attack are presented, The effects of vortex structure on the gas mixing is discussed, too.

• Proceedings of the Korean Society of Marine Engineers Conference
• /
• 2011.06a
• /
• pp.223-223
• /
• 2011

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2010.04a
• /
• pp.26-27
• /
• 2010

Illegal aquaculture farms that cause marine pollution and ship accidents are managed and controlled by local organizations, but they experience many difficulties due to the vast waters and insufficient human resources. This study aims to utilize new IP-RFID technology to propose an efficient aquaculture farm facility management system This system attaches Ip-Tags to aquaculture farms that can provide facility information and location in real-time through IP communications. This allows for efficient management of facilities and the restriction of illegal farms. This system can also provide locations of farm facilities that sink to the ocean floor, reducing marine pollution caused by lost farms.

• Journal of Advanced Marine Engineering and Technology
• /
• v.38 no.4
• /
• pp.456-462
• /
• 2014

In this paper, we develop a facility management system which provides fault effect and replacement alarm function of each component for supporting effective maintenance of facility. To do this, we use weighting method to each component, calculate importance of each component, and make them to hierarchy structure using bill of materials of facility. Also, we draw fault cause and fault effect of components based on failure modes effects and criticality analysis, and define criteria of severity, occurrence and detection to get risk priority number. To apply these concepts, we develop and test the facility management system to verify its practicality. In the future, we expect the developed system to apply many domains such as maintenance of ship and offshore plant.

• Proceedings of KOSOMES biannual meeting
• /
• 2004.11a
• /
• pp.9-11
• /
• 2004

• Proceedings of the Korean Aquaculture Society Conference
• /
• 2002.10a
• /
• pp.30-32
• /
• 2002

• Journal of the Korean Society for Advanced Composite Structures
• /
• v.5 no.4
• /
• pp.44-51
• /
• 2014

As the world energy consumption grows, the interest in marin energy resources is increasing. In excavating such resources, the marine riser which connects the floating structure and sea bed is an essential device. The riser system is often exposed to harsh ocean environment and thus vulnerable to damage. Since the failure of the riser system may cause serious economical loss as well as environmental problem, the structural integrity of the riser is very important. Generally, the riser is an extremely slender structure with a much smaller diameter than a length. Therefore, a structural integrity monitoring methodology for typical buildings and bridges may not be applicable. In this paper, the applicability of a damage identification method for a structure to a marine riser is examined via a numerical example. Also, recent research practices and findings for monitoring the behavior and the structural integrity of the marine riser are examined and summarized.

• Journal of Fisheries and Marine Sciences Education
• /
• v.25 no.6
• /
• pp.1419-1428
• /
• 2013

This Study is to suggest marine tourism development strategy of Yeosu city using a A'WOT analysis technique. Main findings of this study are summarized as following. First, SO(strength-opportunity) strategy is considered as the most important strategy and followed by ST(strength-threat), WO(weakness-opportunity) and WT(weakness-threat) strategy. Second, it can be concluded that marine tourism facility and contents development is considered as the most important factor and followed by marine sport-related marine training program development and so on. For further research, more concrete and empirical study is to be performed by each strategy in the future.

• Journal of the Korean Society for Marine Environment & Energy
• /
• v.19 no.3
• /
• pp.211-217
• /
• 2016

In case of the Sea Areas Utilization Consultation about fishery harbor facilities there has been problems excepting a mooring facility and having the same scope of business subject with harbor, while those scale are different. In this study, we analyzed the 17 cases of the statements for Sea Areas Utilization Consultation according to the development projects of fishery harbors for 2013-2014 and suggested the improvement way to go. First, it is needed to reassess the scope of business subject about fishery harbor because the environmental effects about the development projects for the fishery harbor are not considered separately by facilities, development project for the fishery harbor. Therefore, the reassessment about them are needed surely. Second, the adjustment of the range about fishery harbor facilities on the Sea Area Utilization Consultation is needed because in case of most small fishery ports, the sizes of those facilities are less than the boundary area ($50,000m^2$). Last, consultation subjects shall be more clear in order to protect confusions-related with applying for the Consultation on Utilization of Sea Areas. A new rule for clarifying consultation on business subjects is needed in order to reduce the unclarity and the confusions from being occurred by difference between 'occupancy or use permit of public waters' and 'exclusion of application' and business subjects according to the Public Waters Management and Reclamation Act and the Marine Environment Management Act, respectively.

• Journal of Advanced Marine Engineering and Technology
• /
• v.27 no.5
• /
• pp.657-665
• /
• 2003

Combined De-NOx Process in which $NH_3$ SCR (Selective Catalytic Reduction) and non-thermal Plasma Process are simultaneously used, has been investigated with a pilot test facility. The pilot test facility treats the combustion flue gases exhausted from a diesel engine that generates 240 kW of electrical power. Test results show that up to 80 % of NOx (NO and NO2) can be removed at 100 - $200^{\circ}C$. None of conventional De-NOx techniques works under such low temperature range. In addition to NOx. the Pilot test results show that soot can be simultaneously treated with the present non-thermal plasma technique. The present pilot test shows that the electrical power consumption to operate the non-thermal plasma reactor is equivalent to 3 - 4 % of the electrical power generated by the diesel engine.