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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society for Marine Environment & Energy
Journal Basic Information
Journal DOI :
The Korean Society for Marine Environmental Engineering
Editor in Chief :
Volume & Issues
Volume 15, Issue 4 - Nov 2012
Volume 15, Issue 3 - Aug 2012
Volume 15, Issue 2 - May 2012
Volume 15, Issue 1 - Feb 2012
Selecting the target year
Modelling Algae Transport in Coastal Areas with Marine Afforestation
Cho, Jae-Kweon ; Lim, Young-Soo ; Hong, Do-Ung ; Kim, Jong-Kyu ;
Journal of the Korean Society for Marine Environment & Energy, volume 15, issue 1, 2012, Pages 1~8
DOI : 10.7846/JKOSMEE.2012.15.1.001
To arrange effectively artificial reefs for marine afforestation, tidal currents were analyzed by numerical experiments, and particle tracking based upon tidal currents were carried out to clarify the path of algae spore. The experiments were carried out by EFDC (Environmental Fluid Dynamics Code), and water column was vertically divided 10 layers. Tidal current patterns showed to be affected by main current at outside of study area, and circle currents of two were observed from analysis of residual currents. Particle tracking were experimented for 15 days at 2 installation places in which artificial reefs for marine afforestation would be deployed. According to the results of particle tracking experiment, particle movement at St.1 showed belt type along coastal line, and St.2 showed ellipse type at 300~500 m distant from coastal line. It suggest that artificial reefs for marine afforestation should be installed belt zone at station of St.1 and ellipse zone at St.2. Modelling algae transport was also tested to account for local dispersion of algae spore due to the suspended materials.
A Feasibility Study on Thermal Energy Resource in Deep Ocean Water
Kim, Jeong-Hyop ; Kim, Gwang-Tae ; Park, Se-Hun ; Oh, Wee-Yeong ; Kim, Hyeon-Ju ;
Journal of the Korean Society for Marine Environment & Energy, volume 15, issue 1, 2012, Pages 9~18
DOI : 10.7846/JKOSMEE.2012.15.1.009
Annual power consumption of our country is positioned in the upper percentile in the world, and because the proportion of fossil power generation is high, which ranks the 10th
emission country. In this regard, government has established and is implementing the National Energy Basic Plan to realize to get out of fossilization in energy supply while focusing on securing the technology for renewable energy as well as its commercialization in order to reduce greenhouse gas. Resource recovery technology for deep seawater thermal energy which is one of renewable energies is newly getting attention domestically as well as in overseas for securing resources and environmental improvement as a core technology for multilateral use of marine resources for low carbon and green growth. Economic feasibility analysis was conducted for the research and development as follows on the use of ocean thermal energy conversion and seawater air conditioning. First, in the case of power generation using deep seawater and warm discharge water from ocean thermal energy conversion plant of 1MW level, it is judged that the economic feasibility is insufficient but the feasibility will be significantly improved if we consider not only power generation but also drinking water and certified emission reduction by developing the power plant to the size for commercialization. Second, the economic feasibility for the use of deep seawater as air conditioning for the power plant of 1,000RT level turned out to be very good. Especially, when we consider certified emission reduction, it will be possible to secure sufficient economic feasibility. When we use it in connection with ocean thermal energy conversion, water conversion and agricultural and fishery use, it is judged that economic ripple effect will be significant and therefore it will be necessary to conduct research and development for early commercialization, distribution and diffusion of deep seawater energy.
Characteristics of Variant Dielectric Constants With Respect to Internal Combustion Engine Oil States
Kim, Dong-Min ; Kim, Yong-Ju ; Lee, Seung-Hee ;
Journal of the Korean Society for Marine Environment & Energy, volume 15, issue 1, 2012, Pages 19~21
DOI : 10.7846/JKOSMEE.2012.15.1.019
The engine oil life of internal combustion engine is shorted by the thermal effect and that causes air pollution. In order to measure the status of engine oil accurately, the exchange of new oil extends the life of combustion engine and reduces environmental pollution. Capacitance probes, such as engine oil and fluids can be used to measure the dielectric constant. In this paper, the degradation of engine oil varies depending on the degree of dielectric properties was analyzed. Depending on the state of the oil, the variant capacitance of the probe was measured by LCR Meter, respectively, and then the permittivity of oil was calculated. In addition, according to the size of the probe by measuring the change in capacitance measurement, accuracy of dielectric constant are presented. According to oil contaminated with the more increase in dielectric constant, we can decide that contaminated oil is available.
Theoretical Characteristics of the Probe with Respect to the Engine Oil States
Kim, Young-Ju ;
Journal of the Korean Society for Marine Environment & Energy, volume 15, issue 1, 2012, Pages 22~24
DOI : 10.7846/JKOSMEE.2012.15.1.022
Depending on the status of the engine oil, the dielectric constant is changed. Dielectric constant of oil is related to the characteristic impedance of the probe and the characteristic impedance of the probe determines the reflected signal. In this paper, we derive an equivalent circuit of the probe and using the dielectric constant obtained by measuring the capacitance, the theoretical reflection coefficient of the probe was calculated. In the results, if the engine oil is deteriorated, we can see that the reflection coefficient is increased.
Implementation of the Probe System with Respect to the Engine Oil States Inspection
Kim, Young-Ju ;
Journal of the Korean Society for Marine Environment & Energy, volume 15, issue 1, 2012, Pages 25~29
DOI : 10.7846/JKOSMEE.2012.15.1.025
In this paper, in order to measure the degree of degradation using the reflection coefficient of the probe, the measuring circuit is designed. we put pulse signal into the probe and measure the reflected signal in the circuit. As the condition of engine oil degradation, we can see that the reflected signal was increased and as the engine oil temperature increases, a phenomenon shows that the degradated dielectric constant is decreased. Finally, the theoretical values and measured values of the reflection coefficients of the probe are analyzed.
Scoping for Marine Environmental Impact Assessment of Tidal Power Plant Construction
Kam, Min-Jae ; Kim, Gui-Young ; Jeon, Kyeong-Am ; Yu, Jun ; Lee, Dae-In ; Eom, Ki-Hyuk ;
Journal of the Korean Society for Marine Environment & Energy, volume 15, issue 1, 2012, Pages 30~37
DOI : 10.7846/JKOSMEE.2012.15.1.030
This paper assessed environmental impact of tidal power plant construction in the western sea of Korea, and diagnosed problems of the related assessment. We also proposed key assessment items (scoping) and system improvement for environmental impact assessment (EIA). The establishment of a broad consensus of the appropriateness and a clear purpose for business is an important aspect of the aptness of using the waters, and the aggressive collecting of opinions of the stakeholder and institutions will have to be fulfilled. In addition, we presented the following scoping plan in order to minimize the negative effects of the marine ecosystem and the conflict between the people who work in the fishing industry which result due to the construction of the tidal power plants. (1) the change in seawater exchange rates and the aspect of erosion/sedimentation which result from the change in the velocity of running fluid, (2) the destruction of spawns/habitats of fish due to the damage of tidal flats, (3) fishery resources, impacts of fishing grounds, and the spread of suspended sediments, etc. will have to be applied to the key assessment items(scoping). In addition, every citizen will have work hard for an establishment of an active plan which achieves the harmony and balance of environmental preservation and for the policy to be applied through changing their consciousness of environmental preservation.
Effective Costal Environmental Management by Conjugation of Modeling of Bio-Purification and Total Allowable Pollutant Loads in Masan Bay
Eom, Ki-Hyuk ; Kim, Gui-Young ; Lee, Won-Chan ; Lee, Dae-In ;
Journal of the Korean Society for Marine Environment & Energy, volume 15, issue 1, 2012, Pages 38~46
DOI : 10.7846/JKOSMEE.2012.15.1.038
This study carried out current status, characteristics, and problems of coastal environment management on semi-enclosed Masan Bay in Korea and suggests cost-effective and eco-friendly water quality management policy. The pollutants from terrestrial sources into the Bay have apparently environmental pollution problems, such as eutrophication, red tide, and hypoxia. The carrying capacity of the Bay is estimated by hydrodynamic model and ecosystem model, material circulation including bivalve in ecosystem is analyzed by the growth model of bivalve. The resulting reduction in the input load was found to be 50~90%, which is unrealistic. When the efficiency of water quality improvement through bivalve farming was assessed based on the autochthonous COD, 30.7% of the total COD was allochthonous COD and 69.3% was autochthonous COD. The overall autochthonous COD reduction rate by bivalve aquaculture farm was found to be about 6.7%. This study indicate that bivalve farming is about 31% less expensive than advanced treatment facilities that remove both nitrogen and phosphorous.
A Study on the Chemical Pre-Treatments Suitable for the Layer Differentiation of FRP Waste
Lee, Seung-Hee ; Lee, Jung-Ki ; Kim, Yong-Ju ;
Journal of the Korean Society for Marine Environment & Energy, volume 15, issue 1, 2012, Pages 47~53
DOI : 10.7846/JKOSMEE.2012.15.1.047
As one of the methods for recycling the FRP from the waste ships, separation of roving layer from the mat has some merits in a sense of the eco-friendly and economical recycling process. Similar characteristics, however, between the roving and the mat even with different ratio of the resin and the glass and the thickness of the roving, much thinner than the mat, make the mechanically automatic differentiation difficult. In this study spectrochemical differentiation between the two layers has been made using boiling concentrated sulfuric acid, methanol and isopropanol solution saturated with KOH, or hydrogen fluoride (HF) solution. Furthermore efficiently coloring water-soluble dye following the HF treatment makes the roving layer more distinguishable photophysically. The layer differentiation and the automatic layer distraction move up the date of simple and automatic separation process for the waste FRP.
Study on Linking a Submerged Marine Litter Collection Project to a Marine Environment and Resources Investigation Project
Kim, Jeong-Hyop ; Jang, Cheol-Ho ; Kim, Gwang-Tae ;
Journal of the Korean Society for Marine Environment & Energy, volume 15, issue 1, 2012, Pages 54~65
DOI : 10.7846/JKOSMEE.2012.15.1.054
While fishery has been continuously suffering from deteriorating economic feasibility, the amount of the deposited marine litter has been increasing due to an increased number of marine leisure tourists which are caused by an improved quality of life and five-day work week. In addition, the fishery area has been reduced by the reclamation projects and it is being destroyed by marine pollution with a variety of contaminants coming from land and sea. To protect and improve fisheries in these poor conditions, Korean governments have implemented the submerged marine litter collection projects. However, previous research results on the marine environment and resources indicate that it requires a lot of time investment to achieve tangible results of such improvement. The 300 billion won marine environment and resource investigation project has been executed since July 2004 by Korean governments, which demands strategic approaches to obtain more effective and satisfactory results before the project expires in 2013. Ocean environment research institutes and governments need to cooperate each other to gain efficient and reasonable achievement by identifying and linking related projects. This study suggests that the marine environment and resources investigation projects should run parallel with the submerged marine litter collection projects on mutually agreed research items in the identical area of the ocean to obtain cost-effective improvement of marine environment and fishery conditions.