Research on maximum explosion overpressure in LNG storage tank areas

Dong, Lu; Tan, Wei; Liu, Liyan; Zhu, Guorui; Peng, Lei

doi:10.1016/j.jlp.2017.06.010

Cited by 28 publications

(11 citation statements)

References 18 publications

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“…FLACS software is a simulation tool developed based on CFD (computational fluid dynamics) technology, which has been widely applied in gas explosion, powder explosion, LNG (liquefied natural gas) overflow, dangerous gas leakage and diffusion, and so on, and it has been also recognized by authoritative international standards [36]. In the field of gas explosion safety analysis, simulation results of FLACS software are demonstrated with good agreement to experiment data [32,34,37]. FLACS software comprises three parts.…”

Section: Flacs-explodementioning

confidence: 99%

“…Angers et al utilized FALCS software to model hydrogen explosion characteristics on a pressure swing adsorption device [31]. Lv et al studied the maximum explosion overpressure of gas in LNG (Liquefied Natural Gas) storage tank areas by numerical simulations and experiments [32]. Davis used FLACS to study the characteristics of gas explosion in the complicated coal mine roadway [33].…”

Section: Introductionmentioning

confidence: 99%

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Numerical Analysis of the Characteristics of Gas Explosion Process in Natural Gas Compartment of Utility Tunnel Using FLACS

et al. 2019

Sustainability

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With the rapid urbanization in China, directly buried municipal pipelines have been gradually replaced by urban utility tunnels due to a serious shortage of urban underground spaces and weak disaster prevention of traditional municipal pipelines. The urban utility tunnels normally contain electricity pipelines, natural gas pipelines, heat pipelines, sewer pipelines, etc. If a natural gas pipeline leaks, a fire and explosion might occur and lead to serious consequences. In this study, the characteristics of gas explosion in a natural gas compartment of urban utility tunnel are investigated based on FLACS (Flame Acceleration Simulator) simulations. The results revealed that the flame profile undergoes two unstable flame stages. When the ignition position is set at the middle area (100.25, 1.2, 1.4 m) of the 200 m-long natural gas compartment, the maximum overpressure of the gas explosion in the 200 m-long natural gas compartment is 25.17 bar, which is the largest maximum overpressure under all gas explosion simulation setups. It is also found that the length of the natural gas compartment and different ignition positions have slight effects on the maximum overpressure. This study could provide technical support for structural strength design and division of the fireproofing area of the natural gas compartment in the utility tunnel, which is of great significance to improve urban safety during sustainable development.

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Section: Flacs-explodementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of the Characteristics of Gas Explosion Process in Natural Gas Compartment of Utility Tunnel Using FLACS

et al. 2019

Sustainability

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“…However, relatively less CO 2 storage is required in a CO 2 terminal. Since the LNG tanks are operated in cryogenic and atmospheric pressure conditions except for small-scale satellite terminals, one LNG storage tank can be as large as~160,000 m 3 [56]. However, the pressure of the CO 2 storage tank should be higher than the triple-point pressure of 5.1 bar, meaning the CO 2 storage tanks are pressurized tanks, which are hard to manufacture at capacity bigger than around 5000 tons.…”

Section: Comparison With Lng Terminalmentioning

confidence: 99%

Conceptualization of CO2 Terminal for Offshore CCS Using System Engineering Process

Noh¹,

Kang²,

Huh

et al. 2019

Energies

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In this study, the basic configuration and operation concept of a CO2 terminal were identified by conducting a system engineering process. The performance goal of a CO2 terminal was determined by requirement analysis. Then, functions and timelines were derived by functional analysis to meet the performance goal. Equipment to perform the functions were defined and finally, a process flow block diagram of the CO2 terminal was acquired. The CO2 terminal in this study consisted of three parts. First, the CO2 loading/unloading part is responsible for liquid CO2 unloading from the carrier and loading vapor CO2 onto the carrier. Secondly, the liquid CO2 transmission part extracts liquid CO2 from the storage tanks and increases the pressure until it satisfies the offshore pipeline transportation condition. The vapor-treatment part collects boil-off gas, generates vapor CO2, and charges the storage tanks with vapor CO2 to control the pressure of the storage tanks that discharge liquid CO2. Finally, the study results were compared with a liquefied natural gas (LNG) terminal. The biggest difference between the CO2 terminal in this study and the LNG terminal is that a vaporizer is essential in the CO2 terminal due to the smaller storage capacity of the CO2 terminal and, therefore, the lower amount of boil-off gas.

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“…Yue et al [1] simulated and analyzed the multiple conceivable disasters due to the leakage of LNG storage tanks by using the computational fluid dynamics software FLACS. Lv et al [6] established a reduced model of 160,000 m 3 LNG storage tank according to the ratio of 1: 100, carried out LNG explosion tests, and simulated the explosion process with FLACS. They established the correlation between the test model and the full-size model explosion overpressure to evaluate the maximum explosion overpressure of large LNG storage tanks.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Analysis of Diffusion Process for the Leakages of a Tunnel LNG Pipeline

et al. 2020

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Taking a practical project as an example, based on the computational fluid dynamics (CFD), standard k-ε model and finite element method, a mathematical model for the diffusion due to liquefied natural gas (LNG) pipeline leakage in a tunnel was established, and the diffusion process was numerically simulated for three LNG leakage cases. From the simulation results, the variation of CH4 concentration field and explosive gas cloud with time within the tunnel, and the influence of leakage location on the diffusion was analyzed for the three cases. It was shown that the variation of CH4 concentration field had a similar trend for the three cases, but the CH4 explosive gas cloud length increased rapidly with the LNG leakage intensity so that dangerous situations would occur for the medium and large leakages, and a leak location closer to air inlet would lead to a more dangerous situation. When the amount of LNG leakage in the tunnel is large, the effect of mechanical ventilation is obviously weakened. Furthermore, a nitrogen seal precaution was proposed for the situations.

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Research on maximum explosion overpressure in LNG storage tank areas

Cited by 28 publications

References 18 publications

Numerical Analysis of the Characteristics of Gas Explosion Process in Natural Gas Compartment of Utility Tunnel Using FLACS

Numerical Analysis of the Characteristics of Gas Explosion Process in Natural Gas Compartment of Utility Tunnel Using FLACS

Conceptualization of CO2 Terminal for Offshore CCS Using System Engineering Process

Numerical Simulation and Analysis of Diffusion Process for the Leakages of a Tunnel LNG Pipeline

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