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A Study on the Arrangement of Mooring system at the Quay-type LNG terminal in Ulsan Port

울산항 안벽식 LNG 터미널의 계류시스템 배치에 관한 연구

  • Seungyeon Kim (Division of Navigation Science, Mokpo National Maritime University) ;
  • Yunsok Lee (Division of Coast Guard Studies, Korea Maritime and Ocean University)
  • 김승연 (국립목포해양대학교 항해학부) ;
  • 이윤석 (국립한국해양대학교 해양경찰학부)
  • Received : 2024.07.26
  • Accepted : 2024.08.29
  • Published : 2024.08.31

Abstract

Recently, the interest in eco-friendly energy sources, including liquefied natural gas (LNG), has considerably increased both domestically and internationally, and the development of LNG-handling facilities and berths is actively underway. Ulsan Port has been selected as a Northeast Asian oil and energy hub and is actively developing LNG and oil storage facilities and berths. The LNG terminal currently under construction in the North Port district of Ulsan New Port is a quay-type terminal rather than a dolphin-type terminal, which is the existing main-pier type. However, no domestic or international design standards for the mooring-system arrangement of quay-type LNG terminals exist. Therefore, in this study, to establish design standards for mooring systems for quay-type LNG terminals, we developed a pier that reflected the dolphin-type mooring system arrangement in the Harbour and Fishery Design Criteria and analyzed the sensitivity of mooring-evaluation parameter for actual target berthing vessels. The results showed that, compared to the mooring system arrangement of the existing quay-type pier, the tension of the mooring line, load of the QRH, reaction force of the fender, and ship motion of 6-DOF were generally reduced under the same environmental conditions, which are beneficial for improving ship and pier safety. The results of this study offer a foundation for developing design standards for quay-type LNG terminals.

최근 국내외적으로 LNG를 포함한 친환경 에너지에 대한 관심이 급증하여 LNG 취급시설 및 선석 개발이 활발히 진행되고 있다. 울산항은 동북아 오일 및 에너지 허브 항만으로 선정되어 LNG 및 오일 저장시설과 선석을 개발 중이다. 현재 울산신항 북항지구에 건설 중인 LNG 터미널은 기존의 주요 부두 형태인 돌핀식이 아닌 안벽식 터미널로 건설 중이나 국내외적으로 안벽식 LNG 터미널의 계류시스템 배치에 대한 설계 기준이 없는 실정이다. 그러므로 본 연구에서는 안벽식 LNG 터미널의 계류시스템 설계 기준을 마련하기 위해 항만 및 어항 설계기준에서 돌핀 형태의 계류시스템 배치를 반영한 부두를 개발하여 실제 접안대상 선박에 대한 계류 평가 요소의 민감도를 분석하였다. 분석 결과, 기존 안벽식 부두의 계류시스템 배치와 비교하여 동일한 환경조건에서 계류삭 장력, 계선주 하중, 계류라인 수직각도, 방충재 반력, 선체 6자유도 운동값이 대체로 감소하여 선박 및 부두의 안전성 향상에 유리한 것으로 분석되었다. 본 연구 결과는 안벽식 LNG 터미널의 설계 기준 개발을 위한 기초자료로 활용될 수 있을 것이다.

Keywords

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