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윤상국(Sangkook Yun),박병근(Byung-geun Park) 한국항해항만학회 2008 한국항해항만학회 학술대회논문집 Vol.2008 No.공동학술
As current international guideline and IMO law give severe restrictions for ships to manage ballast water to reduce unintentional organism transfers, several ballast water treatment systems recently have been being developed together with filtration. That is because discharging ballast water from ships causes many pollutions by foreign biological invasive species. The primary treatment system being considered in this study was based on fine screen filtration technology applied to ballast water filter in ballast tank in order to reduce the load of ballast water treatment system. New ballast water filtration system was invented and analysed. The structural stress and strain analysis for ballast filtration systems which are current and invented filters were carried out using UGS and Ansys. The results showed that the structure of current filtering module was not designed to meet the requirement of sea water filtration during ballasting operation. The studies also showed that the invented design of filtration system equipped with back washing and automatic scrapper for eliminating cake of bio-species might be a potentially effective technology for ballast water management of ships ballast tank.
윤상국(Sangkook Yun),박병근(Byung-geun Park) 한국마린엔지니어링학회 2008 한국마린엔지니어링학회 학술대회 논문집 Vol.2008 No.-
As current international guideline and IMO law give severe restrictions for ships to manage ballast water to reduce unintentional organism transfers, several ballast water treatment systems recently have been being developed together with filtration. That is because discharging ballast water from ships causes many pollutions by foreign biological invasive species. The primary treatment system being considered in this study was based on fine screen filtration technology applied to ballast water filter in ballast tank in order to reduce the load of ballast water treatment system. New ballast water filtration system was invented and analysed. The structural stress and strain analysis for ballast filtration systems which are current and invented filters were carried out using UGS and Ansys. The results showed that the structure of current filtering module was not designed to meet the requirement of sea water filtration during ballasting operation. The studies also showed that the invented design of filtration system equipped with back washing and automatic scrapper for eliminating cake of bio-species might be a potentially effective technology for ballast water management of ships ballast tank.
Moss형 LNG수송선 탱크내 Vapor space의 온도 분포에 관한 연구
윤상국,백영순 韓國海洋大學校 附設 海洋科學技術硏究所 1993 硏究論文集 Vol.2 No.1
During LNG unloading process from carrier's tanks, the BOG(Boil-off-gas) returns from the terminal to ship tanks to prevent the tank's pressure drop. After finishing the unloading precedure, the total amount of LNG imported is evaluated by measuring the unloaded amount of LNG, BOG returned, and remaining LNG in carrier's tanks. In estimating the BOG quantity of vapor space in tank, it would be valuable to have more accurate framework based on the simulation method for the temperature profile, rather than temperature average method three points. This paper presents more adequate evaluation method, which is the simulation for the temperatures of vapor space actually measured in the Moss-type LNG carrier's tank.