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Simulation Study on Hydrogen-Heating-Power Poly-Generation System based on Solar Driven Supercritical Water Biomass Gasification with Compressed Gas Products as an Energy Storage System

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Journal of Thermal Science 2020年第2期29卷 365-377页

作者： JIN Hui wang cui FAN Chao State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong UniversityXi'an 710049China

Supercritical water gasification driven by solar energy is a promising way for clean utilization of biomass with high moisture content, but direct discharge of liquid residual causes energy waste and decreases energy efficiency. To reduce energy waste, a poly-generation system for hydrogen-rich gas production coupling heat supply and power generation based on supercritical water gasification of biomass driven by concentrated solar energy was established in this paper, which also provided a novel energy storage method to overcome the shortcomings of solar discontinuity. Thermodynamic model of the system was proposed and life cycle assessment(LCA) of the system was conducted. Influence of different parameters(temperature of 600℃ to 800℃, outlet temperature of heat exchanger of 42℃ to 56℃, biomass slurry concentration of 5% to 6.5%) on the gasification performance, energy and exergy efficiency, energy distribution and global warming potential(GWP) was discussed. The results indicated that hydrogen yield increased as gasification temperature increased since free radical reaction was enhanced which gas production reaction was classified into. Molar fraction of hydrogen increased as gasification temperature increased and reached 65.6% at 750℃. Energy and exergy efficiency of the system reached 74.84% and 34.87% at 700℃ and 600℃ respectively and that of gas production was 18.15% at 650℃, which was the highest. Increasing reaction temperature and decreasing biomass slurry concentration were effective ways to decrease GWP. Optimal operating parameter was reaction temperature of 650℃, outlet temperature of heat exchanger of 50℃ and biomass concentration of 5%.

关键词： biomass supercritical water gasification poly-generation system thermodynamics analysis energy storage life cycle assessment

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Enantioselective induction of oxidative stress by acetofenate in rat PC12 cells

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Journal of Environmental Sciences 2010年第12期22卷 1980-1986页

作者： Ling Li Fen Hu cui wang Xuedong wang Research Center of Environmental Science College of Biological and Environmental Engineering Zhejiang University of Technology Hangzhou 310032 China School of Environmental Science and Public Health Wenzhou Medical College Wenzhou 325035 China

In a non-chiral environment, the enantiomers of a racemate possessed the identical physico-cbemical properties, but in the biological systems they possessed different activities. Considering that the involvement of oxidative damage has been implicated in the toxicities of various pesticides, this study investigated the possibility of enantioselective oxidative stress and cytotoxicity induction by acetofenate （AF） which contains an asymmetrical center on PC12 cells. The results of the cytotoxicity assay indicated that S-（＋）-AF presented more toxic effects than R-（-）-AF and （＋）-AF. It also demonstrated that S-（＋）-AF possessed the strongest effects in induction of reactive oxygen species （ROS） production, decrease in superoxide dismutase （SOD） and catalase （CAT） activities, and increase in malondialdehyde （MDA） level. These results suggested that AF and its enanfiomers could induce enantioselecfive cytotoxicity in PC12 cells mediated by oxidative stress. Therefore, the assessment in environmental safety and new chiral pesticide development should consider enantioselectivity.

关键词： chiral organochlorine pesticides acetofenate enantioselectivity cytotoxicity oxidative stress

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Thermal properties study on the ablation materials of inorganic silicon compound from organosilicone in high percent conversion

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Chinese Science Bulletin 2007年第15期52卷 2048-2053页

作者： cui MengZhong wang WenHua Institute of Chemical Engineering and Materials Yantai University Yantai 264005 China

包含特殊的组的有机硅聚合物准备的硅酮橡胶的新类型与 Sylgard~R184 硅酮橡胶(Dow 制成粒公司) 在 285%.Compared 的裂缝介绍 3.92 MPa 和延伸的张力的力量，它有更好高的温度抵抗并且几乎从房间温度的没有无重状态到 430 deg C。Therm... 详细信息

包含特殊的组的有机硅聚合物准备的硅酮橡胶的新类型与 Sylgard~R184 硅酮橡胶(Dow 制成粒公司) 在 285%.Compared 的裂缝介绍 3.92 MPa 和延伸的张力的力量，它有更好高的温度抵抗并且几乎从房间温度的没有无重状态到 430 deg C。Thermogravimetricanalysis 被进行在不同温度研究热降解作用，热热分解产品是英尺红外决定的踪迹。结果证明随温度的增加，产品的器官的组逐渐地被分解。有机硅橡胶逐渐地在热分解的过程被变成典型无机的 SiCO 混合物。Elementalanalysisand X 光检查光电子光谱学结果证明 pyrolyzates 主要在 1050 deg C 上面由 Si， C 和 O 元素组成。X 光检查衍射分析嘘欠那部分 p-SiCcrystal 结构在氮空气下面在 1050 deg C 从热分解产品逐渐地被引起到 1500 degC。与升起的处理温度，结晶度原文如此并且方石英显然增加。

关键词：硅橡胶消融材料无机碳硅化合物碳化硅晶体

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Hydrodynamic constraints on the energy efficiency of droplet electricity generators

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Microsystems & Nanoengineering 2021年第3期7卷 209-218页

作者： Antoine Riaud cui wang Jia Zhou wanghuai Xu Zuankai wang State Key Laboratory of ASIC and System School of MicroelectronicsFudan UniversityShanghai200433China Department of Mechanical Engineering City University of Hong KongHong Kong999077China

Electric energy generation from falling droplets has seen a hundred-fold rise in efficiency over the past few ***,even these newest devices can only extract a small portion of the droplet *** this paper,we theoretically investigate the contributions of hydrodynamic and electric losses in limiting the efficiency of droplet electricity generators(DEG).We restrict our analysis to cases where the droplet contacts the electrode at maximum spread,which was observed to maximize the DEG ***,the electro-mechanical energy conversion occurs during the recoil that immediately follows droplet *** then identify three limits on existing droplet electric generators:(i)the impingement velocity is limited in order to maintain the droplet integrity;(ii)much of droplet mechanical energy is squandered in overcoming viscous shear force with the substrate;(iii)insufficient electrical charge of the *** all these effects,we found that up to 83%of the total energy available was lost by viscous dissipation during *** this loss by using cascaded DEG devices to reduce the droplet kinetic energy may increase future devices efficiency beyond 10%.

关键词： viscous constraints limiting

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On Uniform Convexity of Banach Spaces

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Acta Mathematica Sinica,English Series 2011年第3期27卷 587-594页

作者： Qing Jin CHENG Bo wang cui Ling wang Department of Mathematics Tsinghua University Beijing 100084 P. R. China Department of Mathematics Xiamen University Xiamen 361005 P. R. China Department of Mathematics Jimei University Xiamen 361021 P. R. China

This paper gives some relations and properties of several kinds of generalized convexity in Banach spaces. As a result, it proves that every kind of uniform convexity implies the Banach-Sakes property, and several not... 详细信息

关键词： Uniformly convex space Banach-Sakes property Banach space

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Chronic toxicity and cytotoxicity of synthetic pyrethroid insecticide cis-bifenthrin

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Journal of Environmental Sciences 2009年第12期21卷 1710-1715页

作者： wang cui CHEN Fang ZHANG Quan FANG Zhuo College of Biological and Environmental Engineering Zhejiang University of Technology Hangzhou 310032 China College of Environmental Science and Engineering Zhejiang Gongshang University Hangzhou 310035 China

With the increasing use of synthetic pyrethroids （SPs）, the significance of ecological safety and health risk is an emerging concern, In this study, we evaluated the chronic aquatic toxicity of eis-bifenthrin （cis-BF） in Daphnia magna and its cytotoxicity in Chinese hamster ovary （CHO） cells as well as human cervical carcinoma （Hela） ceils. Chronic aquatic toxicity tests showed that cis-BF could significantly affect the reproduction of D. magna. The lowest observed effective concentration and the non-observed effective concentration of cis-BF to D. magna were 0.02 and 0.01 μg/L, respectively, and the chronic value was 0.014 μg/L. The intrinsic rate of natural increase was significantly decreased （p 〈 0.05） to 0.02 μg/L. The cytotoxicity assay demonstrated that cis-BF decreased cell viability in CHO and Hela cells in a concentration- and time-dependent manner. The IC50 values for Hela and CHO cells were 4.0 × 10^-5 and 3.2 × 10^-5 mol/L, respectively. Together, these results indicated that cis-BF induced chronic toxicity in both aquatic invertebrate animals and mammalian cells. These findings assist in understanding the impact of SPs on health and environmental safety. Considering the wide spectrum of SPs, a more comprehensive understanding of the negative effects is indispensible for planning future application and regulation of these pesticides.

关键词： cis-bifenthrin Daphnia magna chronic toxicity cytotoxicity

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Sintering process and grain growth of Mn-Zn ferrite nanoparticles

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Rare Metals 2006年第Z1期25卷 526-530页

作者： wang Xin cui Yinfang wang Yongming HAO Shunli LIU Chunjing School of Material Science and Engineering Hebei University of Technology Tianjin 300130 China School of Material Science and Engineering Hebei University of Technology Tianjin 300130 China School of Material Science and Engineering Hebei University of Technology Tianjin 300130 China School of Material Science and Engineering Hebei University of Technology Tianjin 300130 China School of Material Science and Engineering Hebei University of Technology Tianjin 300130 China

The density, microstructure and magnetic properties of non-doped Mn-Zn ferrite nanoparticles sintered compacts were investigated. The compacts of non-doped Mn-Zn ferrite nanoparticles were sintered by segmented-sintering process at lower sintering temperature. The density of sintered samples was measured by Archimedes method, and the phase composition and microstructure were examined by XRD and SEM. The sintered Mn-Zn ferrite magnetic measurements were carried out with Vibrating Sample. The results show that the density of sintered compacts increases with the rising of sintering temperature, achieving 4.8245 g·cm-3 when sintered at 900 ℃, which is the optimal density of Mn-Zn functional ferrite needed and from the fractured surface of sintered samples, it can be seen that the grain grows well with small grain size and homogeneous distribution.

关键词： Mn-Zn ferrite sintering temperature grain growth density magnetic properties

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Highly stretchable, electrically conductive textiles fabricated from silver nanowires and cupro fabrics using a simple dipping-drying method

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Nano Research 2015年第5期8卷 1604-1614页

作者： Hui-wang cui Katsuaki Suganuma Hiroshi Uchida Institute of Scientific and Industrial Research Osaka University Mihogaoka 8-1 Ibaraki Osaka 567-0047 Japan Institute for Polymers and Chemicals Business Development Center Showa Denko K. K. 5-1 Yawata Kaigan Dori Ichihara Chiba 290-0067 Japan

In this study, we combined silver nanowires with cupro fabrics using a dipping- drying method to prepare electrically conductive fabrics. The silver nanowires were first adhered to and then absorbed by microfibers to form electrically conductive fibers. They also filled the gaps and spaces between the microfibers, and were stacked or piled together to form networks with high electrical conductivity. The electrically conductive fabric had low resistance and good stretchability, e.g., 0.0047-0.0091 Ωin the strain range of 0-190%. They also exhibited stable electrical conductivity, as well as excellent flexibility, which remained even when the fabric was stretched, shrunk, or bent. The results show that the electrically conductive fabric can be used as a smart textile, especially in fields associated with weaving, clothing, food products, lifestyle products, medicine, biology, electronics, aviation, and military equipment and accessories.

关键词： fabrics/textiles metals smart materials electrical properties

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Recent Research on the Deformation Behavior of Particle Reinforced Magnesium Matrix Composite: A Review

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Acta Metallurgica Sinica(English Letters) 2019年第4期32卷 413-425页

作者： Kun-Kun Deng cui-Ju wang Kai-Bo Nie Xiao-Jun wang Shanxi Key Laboratory of Advanced Magnesium-Based Materials College of Materials Science and Engineering Taiyuan University of Technology School of Materials Science and Engineering Harbin Institute of Technology

Particle reinforced magnesium matrix composite(PMMC) possesses the merits of high specific strength, high specific modulus, better dimensional stability, good wear resistance and lower production cost, which is thought as a promising material in the field of aerospace, automobile, electronic communication, etc. To eliminate the casting defect, the PMMC is usually experienced hot deformation process. The present paper mainly focuses on the deformation behavior of PMMCs. First, the development of PMMCs based on particle size is introduced. Then, the hot deformation technology and deformation mechanism of PMMCs at elevated temperature are given and analyzed, respectively. After reviewing the dynamic recrystallization and texture of PMMCs, its future development is suggested based on the current research progress.

关键词： Magnesium matrix composite Particle Hot deformation Deformation mechanism Recrystallization

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Relation between stabilization energy, crystal field coefficient and the magnetic exchange interaction for Tb^(3+) ion

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Rare Metals 2006年第Z1期25卷 602-604页

作者： ZHANG Xiangmu MA Wenjuan cui Shuwen wang Lihua Physics Department Cangzhou Normal College Cangzhou 061001 China Physics Department Cangzhou Normal College Cangzhou 061001 China Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China Physics Department Cangzhou Normal College Cangzhou 061001 China

Based on a single ion model, Hamiltonian of the simplest form about magnetocrystalline anisotropy for Tb3+ ion was solved by using the numerical method. The relation between the stabilization energy, crystal field coefficient B20 and the magnetic exchange interaction was studied as temperature approaches to 0 K. The results show that the stabilization energy contributed by Tb3+ is linear with crystal field coefficient B20 approximately, but it is insensitive to the change of magnetic exchange interaction for the strong magnetic substances such as TbCo5, Tb2Co17 and Tb2Fe14B compounds.

关键词： single ion model magnetic exchange interaction crystal field coefficient stabilization energy

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