Evaluation and prediction of the safe distance in liquid hydrogen spill accident

Liu, Yuanliang; Liu, Zhan; Wei, Jianjian; Lan, Yuqi; Yang, Shenyin; Jin, Tao

doi:10.1016/j.psep.2020.08.037

Cited by 43 publications

(11 citation statements)

References 28 publications

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“…hydrocarbons, may be involved. Various factors such as material failure, design deficiency, operation error, or external collision and impact can lead to the vessel or pipeline rupture and release of hazardous material into the environment ( Liu et al, 2021 ). The accidental release of flammable liquids may produce a vapour-air cloud that is capable of being involved in a flash fire or explosion, if ignition source is present.…”

Section: Introductionmentioning

confidence: 99%

“…QRA typically uses many case scenarios combining consequence estimation with event frequencies ( Woodward, 1998 ). Besides, the flammable vapour cloud characteristics are valuable for determining the detection device distribution and arrangement, use of mitigation systems, and emergency response ( Rad et al, 2017 ; He et al, 2020 ; Shen et al, 2020 ; Liu et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

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Numerical investigation of flammable vapour cloud formation from pools of heated organic liquids

Галеев

Поникаров

2022

Heliyon

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical investigation of flammable vapour cloud formation from pools of heated organic liquids

Галеев

Поникаров

2022

Heliyon

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“…Виробництво, зберігання, доставка та використання водню є ключовими складовими водневої економіки [1]. При цьому однією із основних проблем при експлуатації водневих систем залишається забезпечення їх пожежовибухобезпеки [2].…”

Section: постановка проблемиunclassified

Determination of the Reliability of the Gas Generator of the Storage System and Hydrogen Supply

Abramov

Kryvtsova

Mikhailyuk

2023

MEC

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It is noted that as a generalized characteristic of the functional gas generator, which is sensitive to variations in its parameters, it is advisable to use the transfer function, or its analogue - the amplitude-phase frequency characteristic of the gas generator. The amplitude-phase frequency characteristic of the gas generator includes two components - amplitude-frequency and phase-frequency characteristics. During the operation of the gas generator, there will be variations in its parameters - transmission coefficient and time constants, due to aging processes and the influence of external factors. Variations in the parameters of the gas generator lead to variations in its amplitude-frequency and phase-frequency characteristics. Mathematical models for variations in the frequency characteristics of the gas generator are built and it is shown that their frequency range should be limited by the bandwidth of the gas generator. The upper limit of the bandwidth of the gas generator is determined by the root of the biquadratic algebraic equation. For the typical parameters of the gas generator using a hydroreactive sample based on sodium aluminate, graphical dependences of variations of its amplitude-frequency and phase-frequency characteristics are constructed depending on variations of the transmission coefficient, time constants, and frequency. These dependencies are used to determine the parameters of the normal distribution law of variations in the frequency characteristics of the gas generator. In accordance with Lyapunov's rule, a normative law for the distribution of variations in the frequency characteristics of the gas generator is adopted. Due to the symmetry of the distribution of variations in the amplitude-frequency and phase-frequency characteristics of the gas generator, their mathematical expectations are equal to zero. Obtaining estimates of the amplitude and phase reliability of the gas generator is carried out using the Laplace function. The argument of this function is the permissible values of the frequency characteristics of the gas generator and their root mean square deviations. It is shown that with probabilities of 0,9973 and 0,9812, the amplitude-frequency and phase-frequency characteristics of the gas generator will not differ more than when it is turned on. Keywords: gas generator, reliability, frequency characteristics.

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“…Verfondern et al [9] conducted liquid hydrogen pool spread experiments on the surface of water and solid ground. Due to the huge cost and the safety issues related to the experiment, many researchers also investigated the leakage and dispersion of liquid hydrogen numerically [10][11][12][13][14][15][16][17][18][19][20][21], which revealed the underlying mechanisms and the effects of various conditions, such as spill source, season, wind flow, air humidity, etc.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of the Flow Characteristics of Liquid Hydrogen in a Pipe Suffering from External Transient Impact

Liu

Qiu²,

et al. 2022

Energies

Self Cite

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Pipes can be subjected to external transient impacts such as accidental collision, which affects the safe operation of storage and transportation systems for liquid hydrogen. Fluid–structure coupling calculation for a pipe under external transient impact is performed, and the flow characteristics of liquid hydrogen in the pipe are analyzed. The pipe deforms and vibrates when suffering from external transient impact. Liquid hydrogen pressure in a cross-section plane increases along the pipe deformation direction. Additionally, external transient impact enhances the disturbance of liquid hydrogen near the pipe wall. The increased flow resistance and the energy induced by the deformed pipe both affect the flow of liquid hydrogen, and contribute to the fluctuated characteristics of liquid pressure drop. In addition, the phase state of liquid hydrogen remains unchanged in the pipe, indicating that little of the induced energy is transformed into the internal energy of liquid hydrogen. The work provides theoretical guidance for the safe operation of liquid hydrogen storage and transportation systems.

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Evaluation and prediction of the safe distance in liquid hydrogen spill accident

Cited by 43 publications

References 28 publications

Numerical investigation of flammable vapour cloud formation from pools of heated organic liquids

Numerical investigation of flammable vapour cloud formation from pools of heated organic liquids

Determination of the Reliability of the Gas Generator of the Storage System and Hydrogen Supply

Modeling and Analysis of the Flow Characteristics of Liquid Hydrogen in a Pipe Suffering from External Transient Impact

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