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integrated device for multiscale series vibration reduction and energy harvesting

Applied Mathematics and Mechanics(English Edition) 2023年第12期44卷 2227-2242页

作者： Jihou YANG Weixing ZHANG Xiaodong YANG Beijing Key Laboratory of Nonlinear Vibrations and Strength of Mechanical Structures Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China

A multi-degree-of-freedom device is proposed,which can achieve efficient vibration reduction as the main objective and energy harvesting as the secondary purpose.The device comprises a multiscale nonlinear vibration absorber(NVA)and piezoelectric components.Energy conversion and energy measurement methods are used to evaluate the device performance from multiple perspectives.Research has shown that this device can efficiently transfer transient energy from the main structure and convert a portion of transient energy into electrical energy.Main resonance and higher-order resonance are the main reasons for efficient energy transfer.The device can maintain high vibration reduction performance even when the excitation amplitude changes over a large range.Compared with the single structures with and without precompression,the multiscale NVA-piezoelectric device offers significant vibration reduction advantages.In addition,there are significant differences in the parameter settings of the two substructures for vibration reduction and energy harvesting.

关键词： integrated device nonlinear vibration reduction energy harvesting transient vibration energy principle

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Full-scale application and performance of a new multi-self-reflow decentralized Wastewater treatment device: Impact of hydraulic and pollutant loads

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Journal of Environmental Sciences 2023年第9期131卷 37-47页

作者： Xiang Li Yong Huang Yi Guo Wei Li Yuqing Li School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment Suzhou University of Science and TechnologySuzhou 215009China Suzhou SuJing Environmental Engineering Company Jiangsu Suzhou Purification Group Technology CompanySuzhou 215009China

Decentralized treatment of wastewater in rural areas usually has several challenges,which include large fluctuations in pollutant concentration and water quantity,complicated operation and maintenance of conventional biochemical treatment equipment,resulting in poor stability and a low compliance rate of the wastewater treatment process.In order to solve the above problems,a new integration reactor is designed,which uses gravity and aeration tail gas self-reflux technology to realize the reflux of sludge and the nitrification liquid,respectively.The feasibility and operation characteristics of its application for decentralized wastewater treatment in rural areas are explored.The results demonstrated that,under constant influent,the device showed strong tolerance to the shock of pollutant load.The chemical oxygen demand,NH_(4)^(+)-N,total nitrogen and total phosphorus fluctuated in the ranges of 95–715 mg/L,7.6–38.5 mg/L,9.32–40.3 mg/L and 0.84–4.9 mg/L,respectively.The corresponding effluent compliance rates were 82.1%,92.8%,96.4%and 96.3%,respectively.When the wastewater discharge was non-constant and the maximum single-day Qmax/Qmin reached 5,all indicators of the effluent met the relevant discharge standard.The integrated device also demonstrated high phosphorus enrichment levels in its anaerobic zone;the concentration of phosphorus reached a maximum of 26.9 mg/L,which created a good environment for phosphorus removal.The microbial community analysis showed that sludge digestion,denitrification,and phosphorus-accumulating bacteria all played an important role in pollutant treatment.

关键词： Decentralized wastewater treatment integrated device Self-reflux technology Load shock Operational characteristics

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High-Performance Ionic Thermoelectric Supercapacitor for integrated Energy Conversion-Storage

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Energy & Environmental Materials 2022年第3期5卷 954-961页

作者： Xinyu Yang Yuqing Tian Bo Wu Wei Jia Chengyi Hou Qinghong Zhang Yaogang Li Hongzhi Wang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201600China State Key Laboratory for Space Power Sources Technology Shanghai 201600China Engineering Research Center of Advanced Glasses Manufacturing Technology Ministry of Education Donghua UniversityShanghai 201600China

Converting low-grade waste heat into usable electricity and storing it simultaneously requires a new technology that realize the directional migration of electrons or ions under temperature difference and enrichment on the electrodes.Although the urgent demand of energy conversion-storage(ECS)has emerged in the field of wearable electronic,achieving the integrated bi-functional device remains challenge due to the different mechanisms of electrical transportation and storage.Here,we report an ionic thermoelectric supercapacitor that relies on the synergistic functions of thermoelectricity and supercapacitor in the thermoelectric ionogel electrolyte and high-performance hydrogel electrodes to enhance the ECS performance under a thermal gradient.The thermoelectric electrolyte is composed of polyacrylamide hydrogel and sodium carboxymethyl cellulose(PMSC),possessing cross-linked network with excellent cation selectivity,while the ionic thermoelectric properties are further improved in the presence of NaCl.The corresponding Seebeck coefficient and ionic conductivity of the NaCl–PMSC electrolyte reach 17.1 mV K^(-1)and 26.8 mS cm^(-1),respectively.Owing to good stretchability of both gel-based electrolyte and electrode,the fullstretchable integrated ECS device,termed ionic thermoelectric supercapacitor,presents promising thermal-charge storage capability(~1.3 mC,ΔT≈10 K),thus holds promise for wearable energy harvesting.

关键词： integrated device ionic thermoelectric supercapacitor ionogel stretchable

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An integrated device based on Dye-sensitized Solar Cells and Li-ion Battery

An Integrated Device based on Dye-sensitized Solar Cells and...

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第二届新型太阳能电池学术研讨会

作者：云斯宁 Taihong Zhang Yanfang Liu Xiao Zhou Yuzhi Hou Wen Fang 张培新西安建筑科技大学材料与矿资学院功能材料研究所深圳大学化学与化工学院

The new generation battery which can harvest energy from sunlight and chemically store energy that make energy storage and transportation more flexible, are of great significance for energy recycling and society sustainable development. We design and synthesize novel transition metal oxide nitride by situ self-assembly and hydrothermal/solvothermal process, which were used as counter electrode(CE) in dye-sensitized solar cells(DSSC) and anode materials of Li-ion battery(LIB), respectively, assembling into an integrated power pack of DSSC and LIB via a back-to-back pattern. The effects of synthesis conditions, surface morphologies, surface composition, grain size, crystalline defects, doping levels and electronic structure on the electrochemical performance of these hybrid materials in an integrated power pack were systematically investigated. We explore a new technical route to realize the morphology-controllable preparation and the optimized performance of low-cost hybrid materials used in the integrated devices, which will promote the rapid development of new concept integrated devices that coupling energy harvesting, energy conversion and energy storage techniques.

关键词： Energy conversion and storage integrated device Solar cells Lithium ion battery

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Simulated Method on the Release of Sediment Pollutants in the Temple Lake

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Meteorological and Environmental Research 2014年第1期5卷 51-54页

作者： Sha Qian Wang Haitao Zhang Weihao Wuhan Environmental Protection Sciences Research Institute Wuhan University

[ Objective] The research aimed to study simulated method on the release of sediment pollutants in the Temple Lake. [ Method] For existing pollution status of the Temple Lake, sediments and overlying water were sampled by the integrated device. Based on the technical route, through the orthogonal test, release processes of nitrogen and phosphorus from sediment were simulated, and their release speeds were estimated under different temperatures, pH and DO in the laboratory. Relationship between environmental factor and pollutant release was explored. [ Result] The integrated device of sediment sampling and test had simple structure, cheap cost and easy operation, and sediment pollution test could be conducted without disturbing sediment after collecting sediment. Among the studied three impact factors, temperature had the maximum influence on contaminant release process, which should be considered as the important factor of future research. [ Conclusion] Compared with routine research method of sediment contaminant release from other lakes, simulated method of contaminant release from sediment in the Temple Lake had many advantaqes, which was favorable for scientific research in latter period and actual lake control.

关键词： Sediment Contaminant release integrated device Simulated method China

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