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논문 기본 정보

자료유형
학술저널
저자정보
Sang-Won Lee (Daewoo Shipbuilding & Marine Engineering Co) Yude Shao (Korea Maritime and Ocean University) You-Taek Kim (Korea Maritime and Ocean University) Ho-Keun Kang (Korea Maritime and Ocean University)
저널정보
한국마린엔지니어링학회 Journal of Advanced Marine Engineering and Technology (JAMET) 한국마린엔지니어링학회지 제42권 제5호
발행연도
2018.6
수록면
385 - 393 (9page)
DOI
10.5916/jkosme.2018.42.5.385

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Recently, many high-pressure gas-fueled liquefied natural gas (LNG) vessels combined with high-pressure fuel gas compressors or high-pressure pumps/vaporizers have been built because LNG fuel is considered environmentally friendly and satisfies the International Maritime Organization (IMO) requirements. However, there are many reasons to examine its safety requirements, such as gas leakage, explosion, and fire. Because LNG carriers under the IGC code have sailed for long time, there are many adequate safety regulations available. However, safety regulations for LNG-fueled vessels are still insufficient because LNG-fueled vessels with the IGF code do not have enough reference. Most safety regulations applied for the IGF code are in accordance with the safety requirements of IGC code to cover the insufficient safety regulations in IGF code and to prevent risk in LNG-fueled vessels. In particular, the gasdetection system applied in the machinery room by IGF/IGC code only defines the number of gas detectors. There are no rules for their locations, so the gas detectors are installed in agreement among the ship owners, shipyard, and classification societies. The minimum number of detectors in a machinery room (cargo compressor room) by IGF/IGC code is three, but there are no rules for the detecting points. Therefore, ship owners do not heavily rely on the detecting system defined by IGF/IGC code. Therefore, this study considers gas dispersion in the cargo compressor room of an LNG carrier equipped with high-pressure cargo-handling equipment, bringing up reasonable methods of safety regulation and the number and locations of gas detectors specified in the IGF/IGC code. To perform LNG gas-dispersion simulation in the cargo compressor room, the geometry of the cargo compressor room and the arrangement of the equipment and piping are designed with the same 3-dimensional size as the actual structures in the vessel. Scenarios for a gas leak were examined for high pressure of 305 bar. Pinhole sizes for high pressure are 4.5 mm, 5.0 mm, and 5.6 mm. The results show that the cargo compressor room of 174K ME-GI LNG vessels has no serious risk areas regarding the flammable gas concentration, as it is verified that the ventilation assessment was safe for a 5.6-mm pinhole for a high-pressure leak and gas-rupture condition. However, based on the computation fluid dynamics (CFD) simulation, it is verified that the actual gas-detection sensors in the cargo compressor room should be moved to other optimum points and their quantity should be increased. The CFD results of this study will be useful for risk-based design and analysis, and optimum gas-detection points can be applied.
#CFD #Gas dispersion #Gas leak #IGF/IGC code #LNG vessels

목차

Abstract
1. Introduction
2. GA of Cargo System
3. Methodology
4. Results & Discussion
5. Conclusions
References

참고문헌 (12)

참고문헌 신청
[인터넷자원] - / 0000 / International : IMO Marine Engine Regulations google schola [학술지(정기간행물)] - 강호근 / 2013 / An Examination on the Dispersion Characteristics of Boil-off Gas in Vent Mast Exit of Membrane Type LNG Carriers / 해양환경안전학회지 19 (2) : 225 ~ 231 dbpia [학술지(정기간행물)] - F. Gavelli / 2008 / Applied of CFD(Fluent) to LNG spills into geometrically / Journal of Hazardous Materials 159 (1) : 158 ~ 168 Crossref [학술지(정기간행물)] - Ki-Pyoung Kim / 2011 / On the Application of CFD Codes for Natural Gas Dispersion and Explosion in Gas Fuelled Ship / 한국마린엔지니어링학회지 35 (7) : 946 ~ 956 dbpia [학술지(정기간행물)] - 김기평 / 2015 / CFD Approach on Gas Explosion for SIL in Gas Fuelled Ship / 한국마린엔지니어링학회지 39 (2) : 195 ~ 200 Crossref

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UCI(KEPA) : I410-ECN-0101-2018-559-003168459