Journal of Navigation and Port Research (한국항해항만학회지)

Korean Institute of Navigation and Port Research (한국항해항만학회)
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Numerical Assessment of LNGC Berthing Operation to FLBT

FLBT를 향해 접안하는 LNGC의 수치해석 및 안정성 평가

  • Jung, Sung-Jun (Korea Research Institute of Ships and Ocean Engineering) ;
  • Jung, Dong-Woo (Korea Research Institute of Ships and Ocean Engineering) ;
  • Oh, Seung-Hoon (Korea Research Institute of Ships and Ocean Engineering) ;
  • Kim, Yun-Ho (Korea Research Institute of Ships and Ocean Engineering) ;
  • Jung, Dong-Ho (Korea Research Institute of Ships and Ocean Engineering)
  • Received : 2020.08.06
  • Accepted : 2021.03.22
  • Published : 2021.06.30
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Abstract

The IMO has adopted emission standards that strictly restrict the use of bunker C oil for vessels. Accordingly, research and bunkering pilot projects for LNG fueled ships are being actively carried out, which is expected to substantially reduce environmental pollution. In this study, we have adopted the turret moored Floating LNG Bunkering Terminal (FLBT) designed to receive the LNG from LNGCs and to transfer LNG to LNG bunkering shuttles in ship to ship moored condition. Numerical simulations have been performed with a 1-year return period of wind, wave, and current. Damping values of numerical model were adjusted from the results of model tests to obtain accurate simulation results. The results confirm safe berthing operation during the 1-year return period of environmental condition. Safety depends on the direction of environment, with increasingly stable operation facilitated by the application of heading-control function of FLBT to avoid beam-sea conditions.

국제해사기구의 연료유 황 함유량 제한 등, 세계적으로 강화되고 있는 환경규제로 LNG를 선박 연료로 사용하는 연구 및 사업이 활발히 진행되고 있다. 본 연구에서는 기본설계 되어 있는 부유식 벙커링 터미널(FLBT, Floating LNG bunkering terminal)을 대상으로, STS LNG 하역 작업을 위해 접안 하는 과정을 수치 시뮬레이션으로 평가하였다. 수치해석에서는 예인선이 대상선박을 밀 경우 이를 가상의 펜더로 가정하였으며, 당길 때는 HMPE 로프 특성을 적용하였다. 해석에는 파랑, 조류, 바람 1년 재현 확률의 해상조건을 적용하였다. 수치모델은 선행 모형시험 결과로부터 조정되어 정확한 결과를 얻을 수 있도록 하였다. 해석 결과 LNG선은 대부분의 1년 환경조건에서 안전한 접안이 가능하였다. 파랑 방향에 따라 안정성의 차이가 큼으로 FLBT의 Heading control 기능을 적용하여 횡파를 피한다면 더욱 안정적인 운용이 가능할 것이다.

Keywords

Acknowledgement

본 연구는 해양수산부의 LNG벙커링 핵심기술개발 및 체계구축사업 'LNG 벙커링 운영체계 및 위험도 평가기반 운영기술개발'에 의해 수행되었습니다.(PMS4680)

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