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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 13, Issue 4 - Nov 2010
Volume 13, Issue 3 - Aug 2010
Volume 13, Issue 2 - May 2010
Volume 13, Issue 1 - Feb 2010
Selecting the target year
Location Analysis on the Melting System of Waste FRP Ship
Oh, S.W. ; Jeon, T.B. ; Park, J.M. ;
Journal of the Korean Society for Marine Environment & Energy, volume 13, issue 2, 2010, Pages 75~82
The economical efficiency and easy ship building have enabled to spread FRP ships in the shipbuilding field. As waste FRP ships have been thrown away at a river or within a harbour, this matter has become issues. For the improvement of this matter, the melting technique and system of waste FRP ships was developed. But, Decision making was required for a location plan of the melting system of waste FRP ships. It's recognized that the location decision of this system is difficult due to the dependence on technical, economical, environmental factors. In this paper, we survey the primary factors of location-economic, life-environment, infrastructure and make up a question for the experts. We also calculate the important weight and related weight using Fuzzy AHP, Limiting probability method and discuss on the calculation results on the proposed sites.
Loads of a Rigid Link Connecting a Container Ship and a Catamaran Type Container Offloading Vessel in Waves
Hong, Do-Chun ; Kim, Yong-Yook ; Han, Soon-Hung ;
Journal of the Korean Society for Marine Environment & Energy, volume 13, issue 2, 2010, Pages 83~90
The hydrodynamic interaction of two floating bodies in waves freely floating or connected by a rigid link is studied by using a boundary element method in the frequency-domain. The exact two-body hydrodynamic coefficients of added mass, wave damping and exciting force are calculated from the radiation-diffraction potential solution of the improved Green integral equation associated with the free surface Green function. The irregular frequencies in the conventional Green integral equation make it difficult to predict the physical resonance of the fluid in the gap between two bodies floating side by side. However, the improved Green integral equation employed in this study is free of irregular frequencies and always yields the exact solution of the multi-body radiation-diffraction potential boundary value problem. The 6 degree-of-freedom motions of two bodies freely floating side by side or connected parallel by a rigid link have been calculated for the incident wave frequencies ranging from 0.1 to 5 radians per second in head, left and right bow quartering seas. The 6-component load of the rigid link have also been presented.
Numerical Prediction of Chamber Performance for OWC Wave Energy Converter
Jin, Ji-Yuan ; Hyun, Beom-Soo ; Liu, Zhen ; Hong, Key-Yong ;
Journal of the Korean Society for Marine Environment & Energy, volume 13, issue 2, 2010, Pages 91~98
The water elevation inside the air chamber and bi-directional air flow in the duct of Oscillating Water Column wave energy converter is one of the most important factors to evaluate the operating performance. The numerical wave tank based on the commercial software Fluent 6.2 in the present paper is employed to generate the incident waves. The numerical wave tank consists of the continuity equations, the Reynolds-averaged Navier-Stokes equations and the two-phase VOF function. The oscillating amplitude of water column in the chamber and bi-directional air flow in the duct installed on the top of the chamber are calculated, and compared with experimental data to verify the validation of the present NWT. The nozzle effects of the chamber-duct system on the relative amplitudes of the inner free water surface and air flow rate in the duct are investigated.
Ship Sewage Treatment Using Fixed Media Method
Han, Sang-Hwa ; Lee, Dea-Ho ; Nyung, Bu-Nyung ; Bae, Sang-Bum ; Yoon, Jong-Mun ;
Journal of the Korean Society for Marine Environment & Energy, volume 13, issue 2, 2010, Pages 99~104
The purpose of this study is to develop Sewage Treatment Plant that treat sewage which occurred in ship using fixed media method and to consider applicable to the Pilot Scale device of the STP regulations in MLTM(Ministry of Land, Transport and Maritime Affairs) and MEPC(Marine Environment Protection Committee). In test results, pH geometric mean was 7.68,
(Biochemical Oxygen Demand) geometric mean was 7.28 mg/l,
(Chemical Oxygen Demand) geometric mean was 48.39 mg/l, TSS(Total Suspended Solid) geometric mean was 18.00/l, Residual chlorine geometric mean was 0.19 mg/l, and E. coli geometric mean was 1CFU/100 ml. In addition, about 97.4% of
was reduced, the
reduction averaged 96.4%and the TSS reduction averaged 97.6%. STP have been determined by the MLTM and MEPC regulation of the marine pollution prevention equipment for performance testing product.
Comparative Study on Horizontal Axis Turbine(HAT) Impeller Design
Kim, Moon-Chan ; Shin, Byung-Chul ; Lee, Ju-Hyun ; Rhee, Shin-Hyung ; Hyun, Beom-Soo ; Nam, Jong-Ho ;
Journal of the Korean Society for Marine Environment & Energy, volume 13, issue 2, 2010, Pages 105~111
The present study deals with the investigation about the improvement of the design of tidal stream turbine blade (HAT) in comparison with wind turbine blade because the parameters of tidal stream turbine blade has been mostly derived from wind turbines. As such, there is plenty of room for improvement of the HAT impeller blade design. Comparisons have been done between the newly designed and existing impeller computationally. Similar comparisons will also be made for the experimental results in the near future.
An Analysis of Statistical Characteristics of Nonlinear Ocean Waves
Kim, Do-Young ;
Journal of the Korean Society for Marine Environment & Energy, volume 13, issue 2, 2010, Pages 112~120
In this paper time series wave data measured continuously for 24 hours during a storm in Yura Sea Area are used to investigate statistical characteristics of nonlinear waves. The exceedance probability of wave height is compared using the Rayleigh distribution and the Edgeworth-Rayleigh (ER) distribution. Wave data which show stationary state for 10 hours contain 4600 waves approximately. The Gram-Chalier distribution fits the probability of wave elevation better than the Gaussian distribution. The Rayleigh (
) distribution follows the exceedance probability of wave height in general and predicts the probability of freak waves well. The ER distribution overpredicts the exceedance probability of wave heights and the occurrence of freak waves. If wave data measured for 30 minute period which contains 250 waves are used, the ER distribution can predict the occurrence probability of freak waves well. But it overpredicts the probability of overall wave height If no freak wave occurs, the Rayleigh (
) distribution agrees well with wave height distribution for the most of wave height ranges. The wave height distribution of freak waves of which height are less than 10 m shows similar tendency compared with freak waves greater than 10 m. The value of
is related to the kurtosis of wave elevation. It seems that there exists threshold value of the kurtosis for the occurrence of freak waves.
Technical Review on Risk Assessment Methodology for Carbon Marine Geological Storage Systems
Hwang, Jin-Hwan ; Kang, Seong-Gil ; Park, Young-Gyu ;
Journal of the Korean Society for Marine Environment & Energy, volume 13, issue 2, 2010, Pages 121~125
Carbon Capture and Storage (CCS) technology mitigates the emission amount of carbon dioxide into the atmosphere and can reduce green house effect which causes the climate change. Deep saline aquifer or obsolete oil/gas storage etc. in the marine geological structure are considered as the candidates for the storage. The injection and storage relating technology have been interested in the global society, however the adverse effect caused by leakage from the system failure. Even the safety level of the CCS is very high and there is almost no possibility to leak but, still the risk to marine ecosystem of the high concentrated carbon dioxide exposure is not verified. The present study introduces the system and environmental risk assessment methods. The feature, event and process approach can be a good starting point and we found the some possibility from the fault tree analysis for evaluation. From the FEP analysis, we drove the possible scenario which we need to concentrate on the construction and operation stages.