• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• v.2
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• pp.93-95
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• 2006

최근 LNG 선박의 발주량이 급증함에 따라 LNG 선에 승무할 인력의 심각한 부족이 예상되고 있다. 이러한 LNG 선박에 승무할 인력 특히 고급 사관의 부족은 선박 자체의 안전뿐 아니라 궁극적으로는 LNG 수송체계의 안전에도 큰 영향을 미치게 될 것이다. 이 발표에서는 현재 전세계 상선대의 현황에서 출발하여, 최근 LNG 선박의 발주 현황, LNG 선박에 적용되는 최신 기술 및 엔진 등에 대하여 살펴 본 후에 전세계 LNG 선박 수주 잔량을 근거로 하여 필요 인력을 예측해 본다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.06a
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• pp.378-380
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• 2022

대기오염배출에 대한 국제적인 규제가 강화됨에 따라 친환경연료로 추진하는 선박의 운항이 늘고 있다. 친환경연료는 기존 연료 대비 대기오염물질 배출이 낮은 연료로 메탄올, 암모니아, 수소, LNG, LPG 등이 이에 포함된다. 이 중 현재 상용화되어 가장 많이 사용되고 있는 연료가 LNG이며, LNG로 추진하는 선박은 통상 LNG 추진선박으로 불리고 있다. 본 연구에서는 현재 운항되고 있는 LNG 추진선박과 기존 선박의 출력 및 선속을 비교해보고, LNG 추진선박의 출력 동향을 연구할 수 있는 기초연구로 진행되었다. 도출된 결과는 LNG 추진선박의 출력기준을 고찰할 수 있는 기초자료로써 활용될 수 있을 것으로 사료된다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.05a
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• pp.162-163
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• 2018

A risk assessment is performed at the initial design stage of LNG-fuelled ships subject to new fuel supply systems due to marine environmental and emissions regulations. Risk assessment involves a series of logical steps that enable systematic risk analysis and evaluation. LNG-fuelled ships mainly consist of a tank for storing LNG, a gas supply unit for supplying LNG to the engine, an engine using LNG as fuel, and a bunkering manifold for receiving LNG. The components of the LNG fuelled ship are determined according to the characteristics, size, rout, and operating distance. Therefore, the risk factors of each ships are different, and the risk analysis also changes. In this study we consider the systems of ships using LNG as a fuel and analyze the risk assessment of certain cases where the actual risk assessment has been carried out.

• Journal of the Korean Society of Marine Environment & Safety
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• v.26 no.7
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• pp.904-914
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• 2020

Through the Ministry of Trade, Industry, and Energy, South Korea is trying to support the "Building Project for Liquified Natural Gas (LNG) Bunkering Ship," centered on the Korea Gas Corporation, while the Ministry of Maritime Af airs and Fisheries is pushing to construct an LNG bunkering terminal at Busan New Port. LNG bunkering ships are essential for supplying LNG fuel from the terminal to the ships, resulting in the need for safety operation procedures. Therefore, in this study, the stability of a coastal LNG bunkering ship operating from Busan New Port to the anchorage in Busan Port was assessed to investigate the need for operational procedures for coastal LNG bunkering ships. Seakeeping analysis of the LNG bunkering ship was performed for each significant wave height by combining the response amplitude operator from the ship motion analysis under the potential flow theory with the actual observed sea data for five years and Texel, Marsen, and Arsloe (TMA) spectrum suitable for the Busan coast. The results showed that the roll and horizontal acceleration were the main risks that affected the navigation seakeeping performance above a significance wave height of 2 m. The operational periods of the LNG bunkering ship ranged from 83.3% to 99.9% of the total observation period.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2011.11a
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• pp.26-28
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• 2011

지구 온난화를 방지를 위한 국제적 환경규제가 강화되고 이에 따른 선박의 배기가스 규제가 현실화됨에 따라 친환경 선박의 개발 및 운영이 필수적이다. 따라서 세계적인 친환경 선박의 개발 추세를 분석한 결과 최적으로 고려되는 LNG연료를 사용하는 선박의 효용성을 구체적으로 살펴보고 이의 건조를 위한 IMO 법령 등 국제적 동향을 살펴보았다. 또한 이를 근거로 LNG 연료선박의 국내 도입을 위하여 우리나라 관련 법령의 제정 노력 결과와 선박건조 시범사업을 소개하고 향후 추진해야 할 사항을 점검하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2020.11a
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• pp.33-35
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• 2020

해양 및 대기 오염 방지를 위한 친환경선박에 대한 관심이 고조되고 있고 특히 LNG를 연료로 하는 LNG 연료추진선이 확대되고 있다. 그리고 국내에서도 LNG Bunkering 선박 건조에 지속적으로 추진되고 있다. LNG Bunkering의 안전한 운용을 위해서는 여러 위험요소를 분석해야한다. 그 중에도 LNG Bunkering 작업 중 주변 선박 통항에 따른 안전한 이격거리의 확보 또한 중요한 사항이지만 이에 대한 연구는 미진한 형태이다. 이에 안전한 이격거리에 대해서 외국 및 국내규정을 검토하였으나 명확한 규정이 없어 이에 대한 분석을 통한 안전하고, 경제적인 이격거리에 대한 연구가 필요하다. 안전한 이격거리에 대해 분석하기 위한 우선적으로 안전한 이격거리에 영향을 미칠 요소에 대해 검토한다.

• Journal of Navigation and Port Research
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• v.44 no.6
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• pp.439-446
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• 2020

The IMO has adopted emission standards through Annex VI of the International Convention for the Prevention of Pollution from Ships (MARPOL) that strictly prohibit the use of bunker C oil for vessels. In this study, we have adopted the turret-moored Floating LNG-Bunkering Terminal (FLBT) which is designed to receive the LNG from LNGCs and transfer it to LNG-bunkering shuttles in side-by-side moored condition. Numerical analyses were carried out using the high-order boundary-element method for four vessels at various relative distances. Mean wave drift forces were compared in an operational sea state. A model test was performed in the ocean engineering basin at the Korea Research Institute of Ships & Ocean Engineering (KRISO) to verify the safety of the berthing/unberthing operation. In the model test, a jig was designed to simulate tug boats pushing or pulling the bunkering vessels, so that the friction force of the g operation was not affected. Safety depended on the environmental direction, with more stable operation possible if the heading-control function of FLBT is applied to avoid beam-sea conditions.

• Journal of Navigation and Port Research
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• v.45 no.3
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• pp.87-94
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• 2021

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.

• Proceedings of KOSOMES biannual meeting
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• 2017.04a
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• pp.185-185
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• 2017

• Journal of Advanced Marine Engineering and Technology
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• v.37 no.8
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• pp.843-848
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• 2013

As the LNG demands are growing, the constructions of LNG FPSO (Floating Production Storage and Off-loading) and LNG carriers have been constantly increased, and the various design of storage tank has been tried. This paper propose that the material of inner storage tanks is made of 5~9% Ni steel plate and perlite powder insulation instead of urethane foam block. It needs essentially to obtain the proper design specifications that are the pressure of perlite, the characteristics of resilient blanket as the pressure absorber, optimum thickness of blanket and design pressure of tank wall, etc. to enable the perlite insulation system to LNG carrier, The results show that the design thickness of blanket should be between 1/4 to 1/3 of insulation width and the optimum rate becomes 30%, and the design pressure be applied below 1,500 Pa with blanket thickness.