Gas dispersion risk analysis of safety gap effect on the innovating FLNG vessel with a cylindrical platform

Li, Jingde; Ma, Guowei; Abdel–jawad, Madhat; Huang, Yimiao

doi:10.1016/j.jlp.2016.01.005

Cited by 21 publications

(25 citation statements)

References 16 publications

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“…The study was carried out on the topside area of a developed concept FLNG design (Li et al, 2016). The vessel is 480 metres in length, 75 metres in breadth (Fig.…”

Section: The Case Shipmentioning

confidence: 99%

“…For instance, the LNG liquefaction modules installed on the world's largest FLNG unit were arranged in such a way that they are separated from each other by a safety gap of 12.5m to 20m (Li J. et al, 2016). Despite such precautions, it appears that the supporting structures of the liquefaction units are not specially strengthened against potential VCE (personal interview with one of the designers of the vessel).…”

Section: Introductionmentioning

confidence: 99%

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Potential risk of vapour cloud explosion in FLNG liquefaction modules

et al. 2018

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This version is available at https://strathprints.strath.ac.uk/61716/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. still evolving and their safety has yet to be fully and objectively evaluated. This paper explores the probability of occurrence of accidents leading to vapour cloud explosion at one of the topside liquefaction modules of an FLNG. The worst possible scenario with the maximum tolerable probability is identified and the impact of the corresponding vapour cloud explosion is estimated. The strength of the structures supporting the neighbouring modules was examined using finite element analysis to determine if the accident has a potential of escalating to neighbouring modules. Potential Risk of Vapour Cloud Explosion in FLNG Liquefaction ModulesIt is found that the current levels of safety gaps between the liquefaction modules may be insufficient for the structural arrangement in place. It is thought that a new structural design using circular pipes as the structural elements instead of the I-beams may enhance the integrity of the top-side supporting structures against the impact of potential vapour cloud explosion. The effectiveness of the new structure is demonstrated by comparing it to the conventional supporting structure using I-beam members. This also implies that, by using pipe elements, the safety gaps can be reduced, thus making it possible to optimise the topside arrangement more easily.

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“…The study was carried out on the topside area of a developed concept FLNG design (Li et al, 2016). The vessel is 480 metres in length, 75 metres in breadth (Fig.…”

Section: The Case Shipmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Potential risk of vapour cloud explosion in FLNG liquefaction modules

et al. 2018

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“…In order to address these shortcomings of FLNG, a conceptual design of cylindrical FLNG has been proposed based on the conventionally ship-shape-design FLNG (Li et al, 2016a).…”

Section: Introductionmentioning

confidence: 99%

“…However, so far, there are very limited research existing regarding safety design and analysis of the cylindrical FLNGs. (Huang et al, 2016) carried out a case study of Multi-Level Explosion Risk Analysis (MLERA) on the cylindrical FLNG proposed by (Li et al, 2016a).…”

Section: Introductionmentioning

confidence: 99%

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confidence: 95%

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Optimal blast wall layout design to mitigate gas dispersion and explosion on a cylindrical FLNG platform

Hao

et al. 2017

Journal of Loss Prevention in the Process Industries

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This paper presents a comprehensive safety design of blast wall layout on a cylindrical Floating Liquefied Natural Gas (FLNG) platform. Comparing to the mitigation measuresafety gap investigated previously (Li et al., 2016a;Li et al., 2016b), blast wall is a better option to be utilized in the congested areas with space limitation. Both of deterministic and probabilistic studies on the cylindrical FLNG platform with and without blast walls subjected to gas dispersion and explosion are conducted. The Computational Fluid Dynamics (CFD) simulation results of more than 120 gas cloud sizes and 16,000 gas explosion overpressures indicate that blast walls are exclusively beneficial for mitigating of flammable gas cloud and explosion overpressure, if the initial gas leak rates are high momentous. A series of different blast wall layouts are designed for the cylindrical FLNG. By taking all uncertainties including different leak rates, leak locations, and gas cloud conditions etc. into account, the optimal blast wall layout with lowest explosion overpressure exceedance frequencies is determined.

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