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Zhe Xu, Bing Guan, Lixin Wei, Shuangqing Chen, Minghao Li and Xiaoyu Jiang
The development of hydrogen-blended natural gas (HBNG) increases the risk of gas transportation and presents challenges for pipeline security in utility tunnels. The objective of this study is to investigate the diffusion properties of HBNG in utility tu...
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Fengming Du, Cong Li and Weiwei Wang
Oil and gas exploration is a sector which drives the global economy and currently contributes significantly to global economic development. The safety of subsea pipelines is deeply affected by factors such as pipeline buckling, corrosion and leakage. Onc...
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Yexiang Xiao, Zhonghua Gui, Xuesong Li, Zekui Shu, Guangtai Shi and Chunwei Gu
In this paper, the gas-liquid flow is comprehensively analyzed under different inlet gas void fractions, and the effect of tip leakage vortex (TLV) on the gas flow pattern in multiphase pumps is revealed. The results show that the gas flow pattern in an ...
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Yan Xie, Jingchun Feng, Liwei Sun, Junwen Wang, Weiqiang Hu, Bo Peng, Yujun Wang and Yi Wang
Methane leakage during natural gas hydrate (NGH) exploitation is one of the important challenges restricting its safe development, which necessitates further investigation. However, only a few experimental studies have been conducted to characterize the ...
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Sumayh S. Aljameel, Dorieh M. Alomari, Shatha Alismail, Fatimah Khawaher, Aljawharah A. Alkhudhair, Fatimah Aljubran and Razan M. Alzannan
Detection of minor leaks in oil or gas pipelines is a critical and persistent problem in the oil and gas industry. Many organisations have long relied on fixed hardware or manual assessments to monitor leaks. With rapid industrialisation and technologica...
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Qi Wu and Chang-Myung Lee
To improve the leakage location accuracy in a pressurized gas pipe, this paper proposes a modified leakage location method using multilayer perceptron neural networks based on the acoustic emission signal.
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Dae Yun Kim, Chan Ho Jeong, Beom Jin Park, Min Suk Ki, Myung-Soo Shin and Seong Hyuk Lee
This study investigates numerically gaseous CO2 leakage characteristics inside the containers of a transport ship and examines thermal effects on the structural damage that might happen in the containers. First, with consideration of the phase change, th...
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Qingmin Hou and Weihang Zhu
Small leaks in natural gas pipelines are hard to detect, and there are few studies on this problem in the literature. In this paper, a method based on the extended Kalman filter (EKF) is proposed to detect and locate small leaks in natural gas pipelines....
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Wenfeng Guan, Ju Chen, Lijian Chen, Jiaolong Cao and Hongjun Fan
Adopting proton exchange membrane fuel cells fuelled by hydrogen presents a promising solution for the shipping industry?s deep decarbonisation. However, the potential safety risks associated with hydrogen leakage pose a significant challenge to the deve...
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Chao Zhong, Lulu Zhai, Jia Guo, Baoling Cui and Guoyou Chen
This paper proposes a new solution method for the leakage and static characteristics of smooth annular seal under a homogeneous gas-liquid two-phase flow based on a bulk-flow model. In this solution method, the Rayleigh?Plesset equation is introduced int...
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Te-Kwei Wang, Yu-Hsun Lin, Jian-Yuan Shen
Pág. 169 - 180
This research proposes an artificial intelligence (AI) detection model using convolutional neural networks (CNN) to automatically detect gas leaks in a long-distance pipeline. The change of gap pressure is collected when leakage occurs in the pipeline, a...
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Teodoziia Yatsyshyn,Lesya Shkitsa,Oleksandr Popov,Mykhailo Liakh
Pág. 49 - 59
The study tackles the development of new mathematical means for determining distribution in space and time of technogenic load on atmospheric air as a result of non-burning gas well gushing. To date, modeling is the only tool for studying and solving pre...
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Ilya Ostanin, Zahie Anka and Rolando Di Primio
Hydrocarbon prospectivity in the Greater Barents Sea remains enigmatic as gas discoveries have dominated over oil in the past three decades. Numerous hydrocarbon-related fluid flow anomalies in the area indicate leakage and redistribution of petroleum in...
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Dongjie Yan, Hongmei Jiang, Jieling Li, Wenbo Xie, Zhaoguang Wang, Shaopeng Lu and Qiang Zhang
In high-pressure turbines, there is a large difference in temperature between the mainstream and the turbine blade surface. Most of the turbine blade tip heat transfer studies were conducted under the assumption that the Over-Tip-Leakage (OTL) flow field...
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Lianshuang Dai, Ting Wang, Caiyan Deng, Qingshan Feng and Dongpo Wang
Above ground indirect detections and random excavations that have applied the past years for buried long distance oil and gas pipelines can only identify some damaged coating locations. Hence, large number of field joint coating (FJC) failures happen unc...
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Zhen Xu, Lianjiang Xu, Junfeng Sun, Meihong Liu, Taohong Liao and Xiangping Hu
Flexible support cylindrical gas film seals (CGFSs) adapt well to rotor whirling and have a good gas lubrication effect during thermal deformation. However, when a CGFS operates under the ?three high? (high interface slip speed, high-pressure differentia...
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Yan Xie, Jingchun Feng, Weiqiang Hu, Mingrui Zhang, Junwen Wang, Bo Peng, Yujun Wang, Zhenwu Zhou and Yi Wang
The ubiquitous methane seeping process in the deep-sea environment could significantly influence the global methane cycle and carbon budget. Hydrate formation on the methane bubble during the seeping process is an important way for sequestrating methane ...
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Petr Trávnícek, Lubo? Kotek, Tomá? Koutný, Tomá? Vítez
Pág. 397 - 405
Biogas plants are a specific facility from the QRA (Quantitative Risk Assessment) methodologies' point of view, especially in the case of the determination of the event frequency of accident scenarios for biogas leakage from a gas holder and subsequent i...
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Dessyana Kardha,Budhi Sumboro,Yunius Arsita
Pág. HAL. 53 - 61
The current technological developments so rapidly, as well as the development of electronics technology. Robotics is a proof of human civilization that progresses from time to time. The shape of the robot is not just a form that resembles a human or a ce...
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Dong Tang, Huixiang Jian, Min Song and Zhongming Jiang
During the operation of underground water-sealed oil storage caverns, a large amount of oil vapor is generated due to volatilization. Oil vapor can easily leak into the surrounding rock, and fractures in the surrounding rock are usually the dominant chan...
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