Experimental Study of Slosh-induced Loads on an LNG Fuel Tank of a Container Ship

2020 ◽  
Vol 30 (2) ◽  
pp. 141-148
Author(s):  
Jieung Kim ◽  
Yonghwan Kim ◽  
Sang-Yeob Kim ◽  
Kwang-Min Lee ◽  
Young-Jae Sung
Keyword(s):  
Experimental Study ◽  
Fuel Tank ◽  
Container Ship ◽  
Lng Fuel

Structural Development of LNG Fueled Large Container Ship

2013 ◽  
Author(s):  
Jeong Hwan Kim ◽  
Joong Hyo Choi ◽  
Sung Gun Park ◽  
Dong Kwon Lee ◽  
Yeong Tae Oh
Keyword(s):  
Propulsion System ◽  
Point Of View ◽  
Fuel Tank ◽  
Structural Development ◽  
Distribution Analysis ◽  
Container Ship ◽  
Emission Regulation ◽  
Lng Fuel ◽  
Large Container ◽  
Structural Point

There is a growing interest in the appearance of LNG fueled large commercial ship with rising oil price and stronger emission regulation of these days. Though small or middle size LNG fueled vessels have been already operated, the application of LNG fuel to large commercial vessels is now under developing in stage. LNG fueled propulsion system can be characterized by three differences than typical propulsion system. First one is 2-stroke dual fuel engine, second one is high pressure fuel supply system and the third is LNG fuel tank. Among these three components, this paper is focused on the LNG fuel tank which was developed by DSME so called ‘ACT-iB’ (ACT-iB: Aluminum Cargo Tank Independent type B). This paper describes engineering works such as structural analysis, crack propagation & leakage analysis and temperature distribution analysis for the application of ACT-iB to LNG fueled vessel. From this development, it was concluded that LNG fueled technologies are ready to large container ship application in structural point of view.

scholarly journals Experimental Study and Application of CFD During the Exploitation Process of Ship in Order to Minimizing the Fuel Consumption

2015 ◽  
Vol 18 (4) ◽  
pp. 136-144
Author(s):  
Quang Le ◽  
Huong Thi Thanh Pham ◽  
He Van Ngo
Keyword(s):  
Boundary Layer ◽  
Experimental Study ◽  
Fuel Consumption ◽  
Water Surface ◽  
Gas Injection ◽  
Ship Hull ◽  
Container Ship ◽  
Air Resistance ◽  
Cfd Method ◽  
Energy Exploitation

The acticle presents a method for minimizing energy exploitation of the ship through reducing ship resistances. Ship resistances include water resistances caused by frictions of water and waves acting on hull part in the water and air resistance acting on the hull part above water surface. To reduce the resistance caused by water friction, the authors proposed a method which intervene directly on the boundary layer of ship hull by the creating a gas injection foaming layer. To reduce air resistance, the authors used CFD method to optimaze arrangement of container on deck for a container ship. Obtained results showed that the proposed method help to save 5-8% of the consuming energy.

Influence of welding residual stress on cryogenic materials applied to LNG fuel tanks for coastal vessels

2020 ◽  
Vol 34 (07n09) ◽  
pp. 2040031
Author(s):  
Tae-Yeob Kim ◽  
Je-Hyoung Cho ◽  
Sung-Won Yoon ◽  
Myung-Hyun Kim
Keyword(s):  
Residual Stress ◽  
Arc Welding ◽  
Local Buckling ◽  
Corrosion Damage ◽  
Fuel Tank ◽  
Welding Residual Stress ◽  
Fuel Tanks ◽  
Fundamental Research ◽  
Lng Fuel ◽  
Transient Thermal

The purpose of this paper is to investigate the influence of welding residual stress (WRS) of the liquefied natural gas (LNG) fuel tank. In general, WRS and distortions are caused by non-uniform temperature distribution by the welding heat source. This will not only cause a brittle fracture, local buckling and corrosion damage, but also adversely affect the fatigue strength of the welded structures. Since LNG is treated at cryogenic temperatures of −162[Formula: see text]C, leakage of LNG from the fuel tank to the outside may cause cracks in the hull and tank support system and cause severe damage. Therefore, it is necessary to predict the thermal behavior and WRS before welding is carried out. In this study, the WRS is calculated by thermal stress analysis based on the temperature distributions over time obtained from the transient thermal analysis. The results of this study can be used as a fundamental research for WRS analysis of plasma arc welding applied to LNG fuel tanks for coastal vessels.

scholarly journals Experimental Study of an On-board Fuel Tank Inerting System

2017 ◽  
Vol 187 ◽  
pp. 012010
Author(s):  
Fei Wu ◽  
Guiping Lin ◽  
Yu Zeng ◽  
Rui Pan ◽  
Haoyang Sun
Keyword(s):  
Experimental Study ◽  
Fuel Tank ◽  
Inerting System

scholarly journals Experimental Study on Bead on Plate (BOP) Welding of 6 mm Thick 9% Nickel Steel by Fiber Laser Welding

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7699
Author(s):  
Jaewoong Kim ◽  
Changmin Pyo ◽  
Yonghyun Kim ◽  
Sungwook Kang ◽  
Taegon Yeo ◽  
...  
Keyword(s):  
Experimental Study ◽  
Fiber Laser ◽  
Filler Metal ◽  
Nickel Steel ◽  
Optimal Conditions ◽  
Fiber Laser Welding ◽  
Butt Welding ◽  
Percent Nickel ◽  
Lng Fuel ◽  
Welding Position

Nine percent nickel steel has excellent properties in a cryogenic environment, so it has recently been used as a tank material for most LNG fuel-powered ships. However, 9% nickel steel causes arc deflection due to its tendency of magnetization during manual FCAW welding and the currently used filler metal is 10–25 times more expensive as a base metal compared to other materials, depending on manufacturers. Furthermore, the properties of its filler metal cause limitation in the welding position. To overcome these disadvantages, in this study, the tendency of penetration shape was analyzed through a fiber laser Bead on Plate (BOP) welding for 9% nickel steel with a thickness of 6 mm and a range of welding conditions for 1-pass laser butt welding of 6 mm thick 9% nickel steel with I-Groove were derived. Through this study, basic data capable of deriving optimal conditions for laser butt welding of 9% nickel steel with a thickness of 6 mm were obtained.

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