Accident analysis of the Gumi hydrogen fluoride gas leak using CFD and comparison with post-accidental environmental impacts

Yang, Seeyub; Jeon, Kyeongwoo; Kang, Dongju; Han, Chonghun

doi:10.1016/j.jlp.2017.05.001

Cited by 32 publications

(23 citation statements)

References 15 publications

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“…CFD method was also widely used to investigate gas dispersion in process safety. Most of the recent works relate to the release of heavy gasses [35][36][37][38] or light gasses [39,40], while the focal point of this paper is on the mixtures with a density very close to the density of ambient air.…”

Section: ∂(ρmentioning

confidence: 99%

Numerical Modelling of the Fire Extinguishing Gas Retention in Small Compartments

Boroń¹,

Węgrzyński²,

Kubica³

et al. 2019

Applied Sciences

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Active fire protection systems are critical elements of good process safety. Among them, gaseous extinguishing systems provide quick, clean suppression and prolonged protection due to long retention process of the gas. Standard design methods do not provide sufficient tools for optimisation of the retention process, thus the necessity for development and validation of new tools and methods—such as Computational Fluid Dynamics (CFD) simulations. This paper presents a simplified approach to CFD modelling, by the omission of the discharge phase of the gas system. As the flow field after discharge is stable and driven mainly by the hydrostatic pressure difference, buoyancy and diffusion, this simplified approach appears as an efficient and cost-effective approach. This hypothesis was tested through performing CFD simulations, and their comparison against experimental measurements in a bench scale in a small compartment (0.72 m3), for six mixtures that differ in their density. Modelling the retention of the standard IG55 mixture was very close to the experiment. Modelling of mixtures with a density close to the density of ambient air has proven to be a challenge. However, the obtained results had sufficient accuracy (in most cases relative error <10%). This study shows the viability of the simplified approach in modelling the retention process, and indicates additional benefits of the numerical analyses in the determination of the fire safety of protected premises.

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Section: ∂(ρmentioning

confidence: 99%

Numerical Modelling of the Fire Extinguishing Gas Retention in Small Compartments

Boroń¹,

Węgrzyński²,

Kubica³

et al. 2019

Applied Sciences

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show abstract

“…With the large-scale development of pipeline engineering [5], the service lives of pipelines have been prolonged [6], and accidents caused by human damage, media corrosion, and other factors leading to pipeline leakage have increased annually [7]. Once leakage occurs, a large-scale dangerous chemical spill can easily occur [8], which not only causes property loss, but also significantly threatens human lives and safety [9].…”

Section: Introductionmentioning

confidence: 99%

Research on Passing Ability and Climbing Performance of Pipeline Plugging Robots in Curved Pipelines

Yan

Wang

et al. 2020

IEEE Access

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To repair leaking pipelines for oil, natural gas and other dangerous media, a kind of pipeline sealing robot is proposed. The device is mainly divided into a robot drive unit, connection unit, and blocking unit. The robot drive unit is used to pull the blocking unit, allowing it to move in the pipeline. The connection unit is used to connect the robot drive unit and the blocking unit. The blocking unit is used to complete the repair at the leakage point. When the robot operates, the drive unit drags the blocking device to the pipeline leakage location, and the front camera can detect the size and shape of the leakage hole. The sealing unit is located at the leakage point, an airbag is inflated, and the adhesive in it is used to seal and repair the leak. Two performance indices (climbing performance and curve passing performance) are evaluated when the robot drive unit is walking. A 3D model of the robot is established, and the performance index of the robot is simulated and analyzed using virtual prototype technology. An experimental platform is built for verification. The conclusions are as follows: (1) A spring with a 13 N/mm rigidity yielded the best performance, and the robot could crawl up a 37° slope. (2) When the deflection angle of the driving wheel was set to 30°, the robot could smoothly pass a bend with a radius of curvature of 500 mm. Thus, the robot performance met the design requirements.

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“…With the development of the process industry, pipeline transportation has been rapidly developed turned into an economically dangerous medium on a global scale [1] and [2]. Leakage accidents caused by self-defects [3], environmental factors [4] and human factors [5] have occurred, causing huge casualties, environmental pollution, and waste of resources. Therefore, there is an urgent need for a fast, effective, and safe plugging equipment for the treatment and disposal of accident pipelines and storage tanks, the control of dangerous sources, and the reduction of the harm caused by leakage [6] and [7].…”

Section: Introductionmentioning

confidence: 99%

Research on the Performance of a New External Occlusion Device for Pressure Vessel Leakage

Yan

Yang

Hou

et al. 2020

SV-JME

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Given the advantages and disadvantages of the existing plugging technology, a new type of external sealing device for pressure vessel leakage is proposed, which has the advantages of fast installation speed, small installation resistance, and stronger adaptability to the leakage surface. The connecting rod propulsion mechanism provides power, uses the fluidity of materials in the annular cavity to adapt to the complex curved surface, and carries out real-time monitoring and self-healing of the plugging process. Through the establishment of a finite element model of conventional top pressure plugging and the new type of external sac plugging method, simulation analysis of the leakage point and the pressure distribution around the crack leak has shown that: in the installation process of the new type of external liquid sac plugging device, a pressure-equalizing contact area and a sealing area are formed around the leakage point, and there is no obvious stress concentration phenomenon. When the thickness of the gasket is low, the deformation is uniform, which overcomes the problems of insufficient adaptability of the gasket in the conventional jacking method, and enhances the stability and reliability of emergency plugging.

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Accident analysis of the Gumi hydrogen fluoride gas leak using CFD and comparison with post-accidental environmental impacts

Cited by 32 publications

References 15 publications

Numerical Modelling of the Fire Extinguishing Gas Retention in Small Compartments

Numerical Modelling of the Fire Extinguishing Gas Retention in Small Compartments

Research on Passing Ability and Climbing Performance of Pipeline Plugging Robots in Curved Pipelines

Research on the Performance of a New External Occlusion Device for Pressure Vessel Leakage

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