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已投运风电场发电量预估方法探析

绿色科技 2024年第10期26卷 220-227页

作者：王烙鑫北京乾华科技发展有限公司北京100073

现有后评估测算发电量方法同可研阶段测算方法较类似,未考虑项目地形图偏差、软件误差及风电场实际故障损失和弃风、限电等损失。以陕西某7个已投运风电场为研究对象,结合运行期SCADA数据,研究前期评估发电量和运行期发电量差异,总结出... 详细信息

现有后评估测算发电量方法同可研阶段测算方法较类似,未考虑项目地形图偏差、软件误差及风电场实际故障损失和弃风、限电等损失。以陕西某7个已投运风电场为研究对象,结合运行期SCADA数据,研究前期评估发电量和运行期发电量差异,总结出一套风电场运行期发电量评估方法。对于已投运风电场,需对运行期并网电量进行还原,考虑风电场故障损失、电网限电损失及弃风等损失后,得到运行期理论并网电量。将与风电场同时段的中尺度Merra2月均风速与各月理论发电量进行线性相关,得到运行期理论发电量与中尺度风速线性关系曲线。采用该关系,利用中尺度数据多年平均逐月风速计算得出代表年理论发电量。考虑风电场运行期平均故障损失、平均电网限电损失以及弃风率等,经综合折减得到后续年份平均并网电量。根据上述研究方法,可有效降低后续年份发电量预估的风险,从而令已投运风电场发电量预估更趋合理。

关键词：风电场后评估发电量中尺度风速代表年

Synthesis and luminescence properties of apatite-type red-emitting Ba_(2)La_(8)(GeO_(4))_(6)O_(2):Eu^(3+)phosphors

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Journal of Rare Earths 2021年第11期39卷 1320-1326,I0001页

作者： Kun Nie Xiaoxue Ma Panlong Lin Navnita Kumar luoxin wang Lefu Mei State Key Laboratory of New Textile Materials&Advanced Processing Technology and Key Laboratory of Textile Fiber and Products(Ministry of Education) School of Materials Science and EngineeringWuhan Textile UniversityWuhan 430200China Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChinaUniversity of Geosciences(Beijing)Beijing 100083China Department of Chemistry and Biochemistry University of CaliforniaLos AngelesCA 90095USA

A new kind of apatite-type red-emitting Ba_(2)La_(8)(GeO_(4))_(6)O_(2):Eu^(3+)phosphor was prepared by high temperature solid-state *** Rietveld analysis based on the powder diffraction data shows that Ba_(2)La_(8)(GeO_(4))_(6)O_(2):Eu^(3+)phosphors possess a pure apatite phase without any *** emission spectrum of Ba_(2)La_(8)(GeO_(4))_(6)O_(2):Eu^(3+)phosphor consists of two bands,an orange emission band from 500 to 600 nm and a red emission band from 600 to 680 *** varying the amount of the doped europium ions from 0.02 to 0.14 mol,it is found that the luminescent properties of this rare earth phosphor are the best when the concentration of europium ion is 0.08 *** optimum concentration is eventually proved to be 0.08 *** Eu^(3+)doping dependent luminescence quenching can be further ascribed to dipole-quadrupole *** quantum yield of Ba_(2)La_(7.92)(GeO_(4))_(6)O_(2):0.08 Eu^(3+)is 37.23%.The CIE analysis confirms a reddish emission in the near ultraviolet(n-UV)*** these above properties of the phosphor can help in contribution of promoting white light-emitting diode.

关键词： Apatite Calcination Phosphor Optical property Luminescence Rare earths

Copper Ions Removal from Wastewater by Electrocoagulation Using Cement-based Cathode Plates

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Journal of Wuhan University of Technology(Materials Science) 2023年第2期38卷 387-393页

作者： YOU Song WU Jing wang Shizhe wang Wei LI Qiong ZAHNG Ganggang DING Qinjun wang luoxin College of Materials Science and Engineering State Key Laboratory of New Textile Materials&Advanced Processing TechnologyWuhan Textile UniversityWuhan430200China Department of Logistics Support Wuhan University of TechnologyWuhan430070China School of Materials Science and Engineering Wuhan University of TechnologyWuhan430070China

The present work uses PEO solution to well disperse carbon fiber and identifies percolation thresholds of carbon fiber and carbon black which are used as conductive *** resultant cathode plates have an average compressive strength of 27.3 MPa and flexural strength of 29.09 MPa,which demonstrate excellent mechanical *** Cu^(2+)removal efficiency was measured at different current densities in EC process with cement-based cathode plate,while the voltage changes were *** results showed that the cement-based cathode plate operated stably and achieved 99.7%removal of 1 L of simulated wastewater with a Cu^(2+)concentration of 200 ppm at a current density of 8 m A/cm^(2)for 1 *** of floc and tested cathode plates,SEM and EDS analyses,and repeatability testing of the tested plates demonstrate the reusability of the plates,proving that cement-based plates can effectively replace metal cathode plates,reduce the cost of EC and improve the applicability of EC devices.

关键词： electrocoagulation cathode plate cement-based conductive materials copper ions repeatability

Structural,electrochemical and cycling properties of Nb^(5+)doped LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)cathode materials at different calcination temperatures for lithium-ion batteries

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Optoelectronics Letters 2023年第9期19卷 548-555页

作者： wang Jiangchao XUE Yuming DAI Hongli wang luoxin ZHANG Jiuchao HU Zhaoshuo Institute of New Energy Intelligence Equipment School of Integrated Circuit Science and EngineeringTianjin University of TechnologyTianjin 300384China

LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)cathode material is prepared by sol-gel method and the effects of Nb^(5+)doping and different calcination temperatures on cathode materials were deeply *** and morphological characterizations revealed that the optimal content of 1 mol%Nb^(5+)can stabilize layered structures,mitigate Ni^(2+)migration to Li layers,improve lithium diffusion capacity,and reduce lattice expansion/shrinkage while *** calcination temperature at 800℃can not only ensure good morphology,but also suppress the mixed discharge of lithium and nickel in the internal *** performance evaluation revealed that Nb^(5+)doping improves the discharge-specific capacity of the material,which is conducive to ameliorating its rate capability and cycle *** the material at 800℃exhibits the highest discharge specific capacity,the best magnification performance,low polarizability,and the best cycle reversibility.

关键词： O_(2)cathode materials at different calcination temperatures for lithium-ion batteries Structural doped LiNi electrochemical and cycling properties of Nb

Effect of preheating and annealing temperature on the microstructure and optoelectronic properties of CZTS films prepared by sol-gel method

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光电子快报:英文版 2023年第7期19卷 410-415页

作者： HU Zhaoshuo XUE Yuming DAI Hongli wang luoxin ZHANG Jiuchao wang Jiangchao Institute of New Energy Intelligence Equipment School of Integrated Circuit Science and EngineeringTianjin Universityof TechnologyTianjin 300384China

The effects of different preheating and annealing temperatures on the surface morphology,microstructure,and optical properties of Cu_(2)ZnSnS_(4)(CZTS) thin films are investigated by controlling the preheating and annealing *** prepared thin films were characterized using X-ray diffraction(XRD),Raman spectroscopy,scanning electron microscopy(SEM),and ultra-violet-visible(UV-Vis) spectroscopy *** and Raman spectroscopy showed that a Kesterite structure with a selective orientation along the(112) peak was generated,and the thin films produced at a preheating temperature of 300℃ and annealing temperature of 570℃ had fewer secondary phases,which was beneficial for improving the performance of the solar *** confirms that the crystallite size increases and then decreases as the temperature increases,and the largest and most uniform crystallite size with the smoothest surface is generated at the above preheating and annealing ***-Vis measurements show that the thin films generated at the above temperature have the lowest transmittance and the lowest optical band gap value of 1.46 e V,which is close to the optimal band gap value for solar cells and is suitable as an absorber layer material.

关键词： annealing microstructure films

Effect of complexing agent concentration on properties of CdZnS thin films in ammonia-thiourea system

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Optoelectronics Letters 2023年第4期19卷 222-226页

作者： Lü Chaoqun XUE Yuming DAI Hongli wang luoxin wang Yifan XIE Xin Institute of New Energy Intelligence Equipment School of Integrated Circuit Science and EngineeringTianjin University of TechnologyTianjin 300384China

In this paper,the effects of different concentrations of complexing agent(ammonia)on the surface morphology,composition,structure and photoelectric properties of Cd Zn S films were *** results of X-ray diffraction(XRD),scanning electron microscopy(SEM)and UV-visible spectrum showed that the surface morphology of the films became worse and the content of zinc decreased significantly with the increase of ammonia *** crystalline phase of Cd Zn S films was not influenced by the ammonia *** the film has good absorbance,transmittance greater than 70%and band gap width between 3.5 eV and 3.07 eV,it is suitable to be used as a buffer layer for solar *** S,Zn O and Zn(OH)_(2) were found in the precipitates at the bottom of the solution,and the formation of these precipitates affected the properties of the Cd Zn S films.

关键词： ammonia agent properties

Research on the properties of ZnO_(1-x)S_(x) thin films modified by sulfur doping for CIGS solar cells

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Optoelectronics Letters 2022年第11期18卷 678-682页

作者： SUN Hang XUE Yuming wang luoxin GUO Qing LI Penghai School of Integrated Circuit Science and Engineering Tianjin University of TechnologyTianjin 300384China

ZnO_(1-x)S_(x) thin films modified by sulfur doping were prepared on glass substrates by chemical bath deposition(CBD) for studying the effect of thiourea concentration on the thin film properties. The obtained ZnO_(1-x)S_(x) thin films were characterized by scanning electron microscopy(SEM), which shows the surfaces of ZnO_(1-x)S_(x) thin films deposited under the thiourea concentration of 0.14 M are more compact. X-ray diffraction(XRD) measurement shows that the ZnO_(1-x)S_(x) thin films with hexagonal crystal structure had strong diffraction peaks and better crystallinity. The optical transmittance of the ZnO_(1-x)S_(x) thin films with 0.14 M thiourea concentration is above 80% in the wavelength range of 300-900 nm. According to the measurement results from spectrophotometer, the ZnO_(1-x)S_(x) band gap energy value Eg varies nonlinearly with different S/(S+O) ratio x, and increases with the increase of x. There is a band gap value of 2.97 eV in the ZnO_(1-x)S_(x) thin films deposited under 0.14 M thiourea concentration. Therefore, the thin films have better structural, optical and electric properties, and are more suitable for the buffer layers of copper indium gallium selenide(CIGS) thin film solar cells.

关键词： properties doping thiourea

Paper‑like Polyphenylene Sulfide/Aramid Fiber Electrode with Excellent Areal Capacitance and Flame‑Retardant Performance

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Advanced Fiber Materials 2022年第5期4卷 1246-1255页

作者： Yan Yu Diankun Pan Liang Zhao Shiqi Huang Panlong Lin Zhixian wang Yingbin Jia Hua wang luoxin wang College of Materials Science and Engineering Key Laboratory for New Textile Materials and Applications of Hubei ProvinceWuhan Textile UniversityWuhan 430200China

In this paper,an aramid chopped fiber,so-called(ACF)/polyphenylene sulfide(PPS)composite,containing multi-walled carbon nanotubes(MWCNT),and in situ polymerized polypyrrole(PPy)was designed and fabricated,to be applied as a paper based *** ACF/PPS/MWCNT-PPy electrode features highly porous paper-like structure with excel-lent electrochemical activity,rendering it a high areal capacitance of~3205 mF cm^(-2) at a current density of 5 mA cm^(-2).After 5000 charge-discharge cycles,the areal capacitance still maintains 93%and 70%at high current densities of 20 and 80 mA cm^(-2),***,the ACF/PPS/MWCNT-PPy electrode displays over 50%the areal capacitance and maintains it's mechanical stability after annealing at 300℃.The UL-94 test reveals that the highest V-0 flame-retardant performance can be *** these results suggest that the ACF/PPS/MWCNT-PPy composite is a promising material to be used as electrode for supercapacitor with high energy-storage capability and noninflammability.

关键词： Aramid chopped fiber Polyphenylene sulfide Flexible supercapacitor electrode High areal capacitance Noninflammability

Metal halide perovskite nanocrystals with enhanced photoluminescence and stability toward anti-counterfeiting highperformance flexible fibers

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Nano Research 2023年第2期16卷 3542-3551页

作者： Ranran Zhou Chi-An Cheng Xuyi wang Kun Nie Jing Wu Mengyun Wu Xiuqiang Duan Ziyao Hu Injamam Ul Huq Hua wang luoxin wang Lefu Mei Haikun Liu Xiaoxue Ma School of Materials Science and Engineering Hubei Key Laboratory for New Textile Materials and ApplicationsKey Laboratory of Polyphenylene Sulfide Fiber and Application in Textile Industryand State Key Laboratory of New Textile Materials&Advanced Processing TechnologyWuhan Textile UniversityWuhan 430200China Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of Geosciences(Beijing)Beijing 100083China Department of Bioengineering University of California Los AngelesLos Angeles 90095USA China Bluestar Chengrand Co. LtdHigh Tech Organic Fiber Key Laboratory of Sichuan ProvinceChengdu 610042China Department of Energy and Chemical Engineering Dongguan University of TechnologyDongguan 523808China

As a new type of light-collecting and luminescent material,all-inorganic cesium lead halide CsPbX_(3)(X=Cl,Br,I)perovskite nanocrystals(NCs)are expected to have a wide range of applications in the fields of photovoltaics,optoelectronics,and fluorescence anti-counterfeiting,***,improving the fluorescence performance and stability of CsPbX_(3)perovskite NCs to prompt their applications would promise both fundamental and practical significance for in-depth research in the field of halide *** this paper,we developed a modification strategy to introduce a halogen source,zinc bromide(ZnBr_(2))in hexane,to CsPbX_(3)perovskite that can be conducted under atmospheric conditions with reduced reaction cost and easier *** first work in this paper was to apply the modification strategy to CsPbI_(3)nanowires(NWs).Compared with the untreated NWs,the ZnBr_(2)/hexane modified CsPbI_(3)NWs exhibited better fluorescence ***,based on the study of perovskite NWs,we investigated perovskite nanocrystal-CsPbI_(3)nanorods(NRs)with different morphologies and *** was found that the luminescence properties of nanorods(NRs)were ***,we infiltrated the modified NRs into the aramid/polyphenylene sulfide(ACFs/PPS)composite paper yielded from our previous work to study its fluorescence performance for *** luminescence properties under ultraviolet light irradiation enable better performance in fluorescence *** ZnBr_(2)/hexane modification strategy and the applications studied in this work will expand the scope of perovskite research,laying the foundation for the applications of fluorescent anti-counterfeiting,nano-photoelectric devices,and fluorescent composite materials.

关键词： perovskite nanocomposites photoluminescence fluorescent anti-counterfeiting aramid/polyphenylene sulfide compound paper