Article
Engineering, Mechanical
Zhao-Dong Xu, Xiaojiang Liu, Wei Xu, Bin Sun, Xuanya Liu, Dajun Xu
Summary: This paper proposes a disaster chain model for the evolution process from gas leakage to explosion in utility tunnels. By calculating the risk area of gas explosion and systematically studying the evolution of gas leakage and explosion, the study reveals the stratification and concentration of CH4 during gas leakage.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Environmental Studies
Shan Han, Bo Wang, Yibin Ao, Homa Bahmani, Beibei Chai
Summary: The continuous deterioration of global climate is escalating the disaster risk for cities in the Chengdu-Chongqing urban agglomeration. Studying urban resilience is crucial for preventing urban climate disasters and ensuring sustainable urban development in the region. This study proposes the concept of an urban resilience system to measure the interaction and coordinated development of subsystems' resilience in the cities. The results suggest that most cities have low coupling and coordination degrees, with economic and social resilience lagging behind ecological resilience.
ENVIRONMENTAL IMPACT ASSESSMENT REVIEW
(2023)
Article
Energy & Fuels
Xia Li, Tian Zhao, Qing-Han Sun, Qun Chen
Summary: A frequency response function-based modeling method for dynamic gas flow in pipelines is proposed, along with an iterative bilayer optimization algorithm for leak diagnosis. The method efficiently and accurately determines the leakage rate and location through mathematical modeling and analysis, and experimental results demonstrate its accuracy and stability.
Article
Engineering, Multidisciplinary
Feng Li, Laibin Zhang, Shaohua Dong, Hang Zhang, Wenhe Wang, Yun You
Summary: This paper proposed a novel noise-pressure interaction model based on multi-information fusion processing, which can effectively filter interference signals and improve the accuracy and reliability of leakage detection.
Article
Biodiversity Conservation
Yu Zhang, Taoxing Zhu, Haiyan Guo, Xiaohui Yang
Summary: The fast growth of China's economy has adversely affected the country's environment and natural resources. To overcome these challenges, the Chinese government introduced the concept of high-quality development, aiming for comprehensive and sustainable urban development. Studying the interactions within the SERE system in urban agglomeration regions can help policymakers achieve this goal.
ECOLOGICAL INDICATORS
(2023)
Article
Public, Environmental & Occupational Health
Darien Alexander Williams, Amy K. Glasmeier
Summary: This paper demonstrates the use of qualitative analysis in investigating theories of error and causation in natural gas pipeline incidents. The findings from coding text from incident reports reveal a proportion of active and latent errors consistent with other hazardous infrastructure contexts. The study underscores the robustness of existing error theory and highlights the utility of in-depth case analyses to understand complex causation in aggregate form.
Article
Engineering, Electrical & Electronic
Yi Tang, Yuan Zhao, Wenyuan Li, Kaigui Xie, Juan Yu
Summary: This article proposes a multi-state Markov state transition model considering gas pipeline leakage to incorporate gas leakage failure in the EGIES risk evaluation. Analytical formulas are derived to calculate the transition rate parameters in this model. The concept of virtual gas load is introduced to reflect the impacts of gas pipeline leakage on the operation of the natural gas network, and an EGIES network analysis model considering the virtual load nodes is presented. A bi-level sampling method based on mixed sequential and non-sequential Monte Carlo simulation is proposed to simulate the chronological and non-chronological aspects of EGIES simultaneously. The results demonstrate that pipeline leakage failures have significant impacts on the reliability of EGIES and ignoring them will lead to an underestimation of system risk.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Bin Liu, Jianping He, Li Zhang, Jueling Tang, Shihai Zhang, Shizhong Zhang
Summary: This study proposes a FBG-ROTDR joint system based optical fiber sensor, which can achieve high precision strain and temperature measurements, suitable for safety monitoring of buried oil and gas pipelines.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Engineering, Civil
Mingqing Yan, Jun Li, Yanwen Guan
Summary: A study was conducted to develop a rupture leakage calculation model for a natural gas pipeline based on unsteady flow equations and orifice outflow principle. The article describes the rupture and leakage process and introduces an analytical method to calculate pressure change, leakage flow rate, and cumulative leakage amount. By introducing a balance factor and using pipeline state equation and actual operational parameters, the model provides credible and useful results for the leakage process. The proposed method allows for estimation of the leakage process in gas pipelines with cutoff devices at intervals of 8, 16, 24, and 32 km.
JOURNAL OF PIPELINE SYSTEMS ENGINEERING AND PRACTICE
(2023)
Article
Engineering, Multidisciplinary
Fanxi Bu, Yang Liu, Shuangqing Chen, Jing Wu, Bing Guan, Ning Zhang, Xiaoqiang Lin, Lin Liu, Tiancai Cheng, Zechang Shi
Summary: This study focuses on the coupling process of methane leakage passing through soil and entering the atmosphere through numerical simulation. The effects of various factors on methane concentration are analyzed, providing guidance for the design of buried natural gas pipelines in residential buildings.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2022)
Article
Engineering, Environmental
Zhiheng Xia, Zhao-Dong Xu, Hongfang Lu, Haoyan Peng, Zicong Xie, Yankun Jia, Hui Sun
Summary: This study focuses on the gas leakage diffusion behavior and prediction of hazardous areas following pipeline failure in a specific segment of a long-distance transportation gas pipeline. It develops a numerical model for high-pressure gas leakage and diffusion, considering box culvert protection. The study presents the characteristics of gas leakage diffusion and the effects of pressure, leakage diameter, and soil type on gas diffusion. It also introduces prediction models for leakage rate, fastest hazardous time, fastest hazardous distance, and lateral hazardous distance. The results show the annular diffusion pattern of gas leakage at the beginning, primarily along the horizontal direction within the box culvert, and the influence of pressure, leakage diameter, and soil type on gas concentration. The study highlights the importance of accurately predicting gas diffusion to mitigate the risk of accidents.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Chemical
Wenhe Wang, Dan Mou, Feng Li, Chuanfu Dong, Faisal Khan
Summary: This paper proposes a methodology of condition monitoring and dynamic failure probability analysis of urban gas pipeline network. By identifying key design and operational factors, developing a causation-based failure model, transforming it into a Bayesian network, and analyzing operational data, the updated failure probability of the network is monitored to assess the risk combined with potential consequences.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2021)
Article
Engineering, Electrical & Electronic
Petro D. Ndalila, Yuxing Li, Cuiwei Liu, Avoce H. A. Nasser, Edem A. Mawugbe
Summary: This study modeled the dynamic pressure fluctuations of gas using computational fluid dynamics software, and simulated the effect of changing leak orifice number and size on the dynamic pressure in the pipeline. The results showed that changes in leak orifice size or number resulted in changes in leakage rate and dynamic pressure magnitude in the pipeline.
IEEE SENSORS JOURNAL
(2021)
Review
Engineering, Marine
Fengming Du, Cong Li, Weiwei Wang
Summary: Oil and gas exploration plays a crucial role in the global economy and contributes significantly to its development. The safety of subsea pipelines is greatly affected by issues such as buckling, corrosion, and leakage. Serious leaks or damages to subsea pipelines can lead to wastage of resources and even explosions, causing severe casualties and economic losses, as well as detrimental effects on the surrounding ecological environment. Therefore, it is important to address problems related to the buckling, corrosion, and leakage of submarine pipelines. This paper provides a literature review of the latest research on buckling, corrosion, and leak detection.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Physical
Jianlu Zhu, Jun Pan, Yixiang Zhang, Yuxing Li, He Li, Hui Feng, Dongsheng Chen, Yimin Kou, Rui Yang
Summary: This study provides essential information about the diffusion behavior and concentration distribution of underground hydrogen and natural gas mixture leakages through large-scale experimental simulation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Geosciences, Multidisciplinary
Himadri Sen Gupta, Tarun Adluri, Dylan Sanderson, Andres D. Gonzalez, Charles D. Nicholson, Daniel Cox
Summary: This study proposes a multi-objective optimization model to determine optimal retrofitting strategies to enhance community resilience under multiple hazards. The model is applied to analyze the impact of earthquake and tsunami hazards on the community of Seaside, Oregon. The results show that retrofitting buildings to achieve higher seismic codes can significantly reduce the impact of natural hazards on structural damage, population dislocation, and building repair times. It highlights the importance of considering geographical location and mitigation measures when optimizing retrofitting strategies.
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION
(2024)
Article
Geosciences, Multidisciplinary
Huiying Sun, Zhenhua Di, Peihua Qin, Shenglei Zhang, Yang Lang
Summary: This study explored the spatio-temporal variations of drought-flood-disaster (DFD) risks in China using natural and socio-economic datasets. The main findings include the decrease in vulnerability, the increasing flood hazard danger degree, and the close relationship between disaster risk and vulnerability. The results have important implications for disaster management decision-making.
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION
(2024)
Article
Geosciences, Multidisciplinary
Nicholas Kimutis, Tamara Wall, Lyndsey Darrow
Summary: Overall, emergency management plans for extreme heat events in the U.S. show some level of consistency, but there are significant variations in response thresholds and metrics across different locations. Some cities have started adapting response thresholds based on local epidemiological studies, but there are still areas that have not lowered thresholds during cascading hazard events.
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION
(2024)
Article
Geosciences, Multidisciplinary
Chengfang Huang, Ning Li, Zhengtao Zhang, Yuan Liu
Summary: The economic impact of disasters is closely related to regional economic development. China's economic development is conducive to reducing the economic impact of disasters, but regional differences need to be clarified in policy formulation, with reducing indirect impact as a higher priority in more developed areas.
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION
(2024)
Article
Geosciences, Multidisciplinary
Chiara Bruni, Bruno Aparicio, Beatriz Lourenco, Martinho Marta-Almeida, Akli Benali, Susana Barreiro, Alfredo Rocha, Ana C. L. Sa
Summary: This study analyzes the wildfire hazard in a 115,000 ha landscape in Portugal and explores the threat posed to assets of pulp paper companies. It finds that eucalypt plantations not managed by the companies, particularly those with ages between 6 and 9 years, present a major risk. Over half of the landscape has the potential for large wildfires.
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION
(2024)