Prediction of the failure probability of the overhead power line exposed to large-scale jet fires induced by high-pressure gas leakage

Wang, Zhenhua; Shui, Kai; You, Fei; Dederichs, Anne; Markert, Frank; Jiang, Juncheng; Zhang, Yun; Li, Dan; Fu, Zonglin; Xu, Jixiang; He, Lu; Huangfu, Wenhao

doi:10.1016/j.ijhydene.2020.10.099

Cited by 11 publications

(2 citation statements)

References 41 publications

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“…However, before the defects are formed, the failure rate will also gradually increase with the process of cumulative damage. Once the defects are formed, the failure probability of the electric vehicle charging pile will show a step increase 11,12 . Based on the above analysis, the opportunity service age factor and safety failure probability factor that affect the preventive maintenance decision of electric vehicle charging piles are analyzed respectively, laying the foundation for building the operation status indicator system of electric vehicle charging piles and clarifying the operation status of charging piles and corresponding maintenance strategies.…”

Section: Confirmation Of Electric Vehicle Charging Pile Maintenance I...mentioning

confidence: 99%

Preventive maintenance decision model of electric vehicle charging pile based on mutation operator and life cycle optimization

Cai,

Ding,

Jiang

et al. 2024

Energy Science & Engineering

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This paper proposes a preventive maintenance decision model for electric vehicle charging stations based on mutation operators and lifecycle optimization to address the impact of potential faults on maintenance effectiveness. By introducing the particle swarm optimization algorithm with mutation operator, a comprehensive analysis of opportunity service age factor and safety failure probability factor was conducted to establish an indicator system for the operation status of charging piles, and a potential fault identification model was constructed. By optimizing the life cycle, the balance problem between optimal maintenance life and optimal opportunity maintenance life has been solved, thus completing preventive maintenance decisions. The experimental results show that the accuracy of this method in preventive maintenance decision‐making for electric vehicle charging piles can reach 98%, with an average preventive maintenance decision‐making time of 1.6 s for load piles. At the same time, the risk probability value and load loss value are effectively controlled. This study has good application prospects in improving the preventive maintenance effect of electric vehicle charging piles.

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Section: Confirmation Of Electric Vehicle Charging Pile Maintenance I...mentioning

confidence: 99%

Preventive maintenance decision model of electric vehicle charging pile based on mutation operator and life cycle optimization

Cai,

Ding,

Jiang

et al. 2024

Energy Science & Engineering

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show abstract

“…As a high-quality fuel and chemical raw material, methane has a high combustion efficiency . This provides energy for industrial manufacturing, and methane can also be used in organic curing reactions with hydrogen (H 2 ) to realize hydrogen storage and transport under easily accessible temperatures and pressures. − However, methane is highly combustible such that the methane–oxygen mixture is readily ignited . During the transportation and use of methane, a certain concentration of methane will mix with air once a methane leakage occurs, leading to a methane explosion when encountering an open fire. − In the processing industry, the flammable gas and dust explosions have strong destructive power and present unpredictable risks in terms of equipment damage, environmental pollution, and casualties. − With the development of industrial technology, methane explosion accidents are inevitable and pose a huge threat to industrial safety, indicating the importance of preventing methane explosions. , Therefore, studies aiming to effectively prevent and control methane explosions are important.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Suppression of Methane Explosions by N₂/CO₂ Mixtures in Different Proportions

et al. 2023

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To characterize the inerting effect of N2/CO2 mixtures containing various proportions on methane–air explosions, a series of experiments were conducted in a 20 L spherical vessel under the normal temperature (25 °C) and normal pressure (101 kPa). Six concentrations (10, 12, 14, 16, 18, and 20%) of N2/CO2 mixtures were selected to analyze the suppression of methane explosion by N2/CO2 mixtures. The results indicated that the maximum explosion pressure (p max) of methane explosions was 0.501 MPa (17% N2 + 3% CO2), 0.487 MPa (14% N2 + 6% CO2), 0.477 MPa (10% N2 + 10% CO2), 0.461 MPa (6% N2 + 14% CO2), and 0.442 MPa (3% N2 + 17% CO2) in the presence of the same N2/CO2 concentration, and similar decreases in the rate of pressure rise, flame propagation velocity, and production of free radicals were observed. Therefore, with the increase of CO2 concentration in the gas mixture, the inerting effect of N2/CO2 was enhanced. Meanwhile, the whole process of the methane combustion reaction was affected by N2/CO2 inerting, which was mainly attributed to heat absorption and dilution of the N2/CO2 mixture. N2/CO2 with a greater inerting effect leads to lower production of free radicals under the same explosion energy and a lower combustion reaction rate at the same flame propagation velocity. The findings of the current research provide references for the design of safe and reliable industrial processes and the mitigation of methane explosions.

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Flame morphologic characteristics of horizontally oriented jet fires impinging on a vertical plate: Experiments and theoretical analysis

Wang

Jiang

Wang

et al. 2023

Energy

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Prediction of the failure probability of the overhead power line exposed to large-scale jet fires induced by high-pressure gas leakage

Cited by 11 publications

References 41 publications

Preventive maintenance decision model of electric vehicle charging pile based on mutation operator and life cycle optimization

Preventive maintenance decision model of electric vehicle charging pile based on mutation operator and life cycle optimization

Investigation of the Suppression of Methane Explosions by N₂/CO₂ Mixtures in Different Proportions

Flame morphologic characteristics of horizontally oriented jet fires impinging on a vertical plate: Experiments and theoretical analysis

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Prediction of the failure probability of the overhead power line exposed to large-scale jet fires induced by high-pressure gas leakage

Cited by 11 publications

References 41 publications

Preventive maintenance decision model of electric vehicle charging pile based on mutation operator and life cycle optimization

Preventive maintenance decision model of electric vehicle charging pile based on mutation operator and life cycle optimization

Investigation of the Suppression of Methane Explosions by N2/CO2 Mixtures in Different Proportions

Flame morphologic characteristics of horizontally oriented jet fires impinging on a vertical plate: Experiments and theoretical analysis

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Investigation of the Suppression of Methane Explosions by N₂/CO₂ Mixtures in Different Proportions