The Experts below are selected from a list of 8883 Experts worldwide ranked by ideXlab platform
Yichen Zhou - One of the best experts on this subject based on the ideXlab platform.
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buoyant and durable Oil water separation mesh for continuous and efficient collection of both Oil slick and underwater Oil Leakage
Separation and Purification Technology, 2019Co-Authors: Jiaxin Wang, Yi Zhang, Yu Zhao, Yichen ZhouAbstract:Abstract Oil/water separation has aroused widespread concern owning to the severe environmental pollution and energy waste result from the frequent Oil spill accidents and a great deal of discharged Oily sewage. Thus, an efficient Oil/water separation method is highly demanded but remains a challenge. To this respect, a specific mesh with super water repellency, good durability, excellent corrosion resistance and buoyant property has been developed in this work via a facile strategy. By virtue of the above superior properties, the resultant superhydrophobic mesh exhibits ultrahigh permeation flux (>22000 L·m−2·h−1) and high separation efficiency (>98.5%) for gravity-induced Oil-water separation. Moreover, the resultant mesh can be designed as an Oil-collecting device to continuously separate both Oil slick and underwater Oil Leakage from bulk water under the driving of negative pressure, showing a prominent collection capability. It’s worth noting that the effective continuous collection of flowing Oils underwater has been rarely reported in the emerging works. Moreover, the obtained mesh also possesses excellent load carrying capacity by buoyancy testing. With the advantages of the attractive property, the as-prepared superwetting mesh will hold great potential in developing of aquatic devices that can move freely on water with great water repellency, which is helpful for large-scale Oil spill cleanup.
Zhou Hang - One of the best experts on this subject based on the ideXlab platform.
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A Bayesian inference reliability evaluation on the corrosion-affected underground high voltage power grid
'Organisation for Economic Co-Operation and Development (OECD)', 2021Co-Authors: Zhou Hang, Li Fan, Michelle, Le Blanc, Jingzhe PanAbstract:The underground high-voltage power transmission cables are high value engineering assets that suffer from multiple deteriorations through-out life cycles. Recent studies identified a new failure mode – the pitting corrosion deterioration on the layer of phosphor bronze reinforcing tape, which protects the Oil-filled power transmission cables from Oil Leakage due to deterioration of the lead sheath. Two models estimating the phosphor bronze tape life were established separately in this study. The first model, based on mathematical fitting, is generated using a replacement priority model from the power supply industry. This is considered as an empirical-based model. The second model, based on the corrosion fatigue mechanism, utilizes the information of the pit depth distribution and the concept of pit-to-crack transfer probability. The Bayesian inference approach is the conjunction algorithm to update the existing probability of failure model with the newly identified failure modes. Through this algorithm, the integrated probability of failure model contains a more comprehensive background information while maintaining the empirical knowledge on the engineering assets’ performance
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A Bayesian Inference Reliability Evaluation on the Corrosion-Affected Underground High-Voltage Power Grid
'Organisation for Economic Co-Operation and Development (OECD)', 2021Co-Authors: Zhou Hang, Li Fan, Le Blanc Michelle, Pan JingzheAbstract:The underground high-voltage power transmission cables are high value engineering assets that suffer from multiple deteriorations through-out life cycles. Recent studies identified a new failure mode – the pitting corrosion deterioration on the layer of phosphor bronze reinforcing tape, which protects the Oil-filled power transmission cables from Oil Leakage due to deterioration of the leads heath. Two models estimating the phosphor bronze tape life were established separately in this study. The first model, based on mathematical fitting, is generated using a replacement priority model from the power supply industry. This is considered as an empirical-based model. The second model, based on the corrosion fatigue mechanism, utilizes the information of the pit depth distribution and the concept of pit-to-crack transfer probability. The Bayesian inference approach is the conjunction algorithm to update the existing probability of failure (PoF) model with the newly identified failure modes. Through this algorithm, the integrated PoF model contains a more comprehensive background information while maintaining the empirical knowledge on the engineering assets’ performance.
Jieqi Wang - One of the best experts on this subject based on the ideXlab platform.
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self cleaning ph thermo responsive cotton fabric with smart control and reusable functions for Oil water separation
RSC Advances, 2016Co-Authors: Jindan Wu, Chong Zhang, D J Jiang, Sufang Zhao, Yuelin Jiang, Jieqi WangAbstract:Nowadays, the environmental problem caused by Oily wastewater discharge and crude Oil Leakage has attracted worldwide attention. Recently developed technologies for Oil/water separation have been based mainly on materials with special wettability. In this work, a self-cleaning system with smart-control and reusable functions for Oil/water separation has been built on cotton fabric via surface-initiated atom transfer radical polymerization (ATRP) of 2-dimethylaminoethyl methacrylate (DMAEMA). The fabric showed high pH- and thermo-responsibility, which was strongly dependent on the pDMAEMA grafting ratio. And by modulating pH or temperature, the fabric switched from superhydrophilic (WCA ∼ 0°) to highly hydrophobic (WCA ∼ 130°), and therefore, were suitable both for the separation of water-rich or Oil-rich Oil/water mixtures as a type of adsorbent material. The fabric could adsorb Oil over 4 times its own weight, and reversibly release it in acidic water, making the fabric easily recyclable.
Jiadao Wang - One of the best experts on this subject based on the ideXlab platform.
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separation mechanism and construction of surfaces with special wettability for Oil water separation
ACS Applied Materials & Interfaces, 2019Co-Authors: Chaolang Chen, Ding Weng, Awais Mahmood, Shuai Chen, Jiadao WangAbstract:Oil Leakage and the discharge of Oil/water mixtures by domestic and industrial consumers have caused not only severe environmental pollution and a threat to all species in the ecosystem but also a huge waste of precious resources. Therefore, the separation of Oil/water mixtures, especially stable emulsion, has become an urgent global issue. Recently, materials containing a special wettability feature for Oil and water have drawn immense attention because of their potential applications for Oil/water separation application. In this paper, we systematically summarize the fundamental theories, separation mechanism, design strategies, and recent developments in materials with special wettability for separating stratified and emulsified Oil/water mixtures. The related wetting theories that unveil the physical underlying mechanism of the Oil/water separation mechanism are proposed, and the practical design criteria for Oil/water separation materials are provided. Guided by the fundamental design criteria, various porous materials with special wettability characteristics, including those which are superhydrophilic/underwater superoleophobic, superhydrophobic/superoleophilic, and superhydrophilic/in-air superoleophobic, are systemically analyzed. These superwetting materials are widely employed to separate Oil/water mixtures: from stratified Oil/water to emulsified ones. In addition, the materials that implement the demulsification of emulsified Oil/water mixtures via the ingenious design of the multiscale surface morphology and construction of special wettability are also discussed. In each section, we introduce the design ideas, base materials, preparation methods, and representative works in detail. Finally, the conclusions and challenges for the Oil/water separation research field are discussed in depth.
Xu Gang - One of the best experts on this subject based on the ideXlab platform.
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Leakage Performance of Floating Ring Seal in Cold/Hot State for Aero-engine
'Elsevier BV', 2019Co-Authors: Li Guoqing, Zhang Qian, Huang Enliang, Lei Zhijun, Wu Hongwei, Xu GangAbstract:© 2019 Chinese Society of Aeronautics and Astronautics. Production and hosting by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license. http://creativecommons.org/licenses/by-nc-nd/4.0/Rotating experimental investigations were carried out to study the Oil sealing capability of two different floating ring seals in cold/hot state for aero-engine. High-speed floating ring seal (HFRS) is a seal with the inner diameter of 83.72mm and maximum speed of 38000rpm, and Low-speed floating ring seal (LFRS) is another seal with the inner diameter of 40.01mm and maximum speed of 18000rpm. In hot state, sealing air with the temperature of 371K and Oil with the temperature of 343K was employed to model the working conditions of an aero-engine. Comparisons between floating ring seal and labyrinth seal were done to inspect the Leakage performance. More attention was paid to the critical pressure ratio where the Oil Leakage began. Results show that the critical pressure ratio in cold state is obviously larger than that in hot state for both seals. An underlying sealing mechanism for floating ring seal is clarified by the fluid film, which closely associates with the dimensionless parameter of 2c/Dr. Another fantastic phenomenon is that the Leakage coefficient in hot state, not the Leakage magnitude, is unexpectedly larger than that in cold state. Overall, the Leakage performance of the floating ring seal is better than the labyrinth seal.Peer reviewe
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Leakage Performance of Floating Ring Seal in Cold/Hot State for Aero-engine
'Elsevier BV', 2019Co-Authors: Li Guoqing, Zhang Qian, Huang Enliang, Lei Zhijun, Wu Hongwei, Xu GangAbstract:© 2019 Chinese Society of Aeronautics and Astronautics. Production and hosting by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license. http://creativecommons.org/licenses/by-nc-nd/4.0/Rotating experimental investigations were carried out to study the Oil sealing capability of two different floating ring seals in cold/hot state for aero-engine. High-speed floating ring seal (HFRS) is a seal with the inner diameter of 83.72mm and maximum speed of 38000rpm, and Low-speed floating ring seal (LFRS) is another seal with the inner diameter of 40.01mm and maximum speed of 18000rpm. In hot state, sealing air with the temperature of 371K and Oil with the temperature of 343K was employed to model the working conditions of an aero-engine. Comparisons between floating ring seal and labyrinth seal were done to inspect the Leakage performance. More attention was paid to the critical pressure ratio where the Oil Leakage began. Results show that the critical pressure ratio in cold state is obviously larger than that in hot state for both seals. An underlying sealing mechanism for floating ring seal is clarified by the fluid film, which closely associates with the dimensionless parameter of 2c/Dr. Another fantastic phenomenon is that the Leakage coefficient in hot state, not the Leakage magnitude, is unexpectedly larger than that in cold state. Overall, the Leakage performance of the floating ring seal is better than the labyrinth seal.Peer reviewedFinal Accepted Versio
