检索结果-南通市图书馆

Journal of energy Chemistry 2024年第10期97卷 419-428,I0008页

作者： Yu Liu Kun Lang Huifang Han Huijing Liu Yao Fu Pengchen Zou Yinhui Lyu Jia Xu Jianxi Yao State Key Laboratory of Alternate Electrical Power System with renewable energy Sources Beijing Key Laboratory of Energy Safety and Clean UtilizationNorth China Electric Power UniversityBeijing 102206China

CsPbI_(2)Br perovskite solar cell has been extensively studied due to its exceptional thermal stability and relatively stable perovskite phase ***,the presence of bromine leads to a rapid crystallization rate of CsPbI_(2)Br films,resulting in small grain size and high defect ***,CsPbI_(2)Br demonstrates poor light absorption due to its wide ***,it is crucial to control the crystallization rate and increase the film thickness to reduce defect density,enhance light absorption,and improve photovoltaic *** this study,we utilized a PbAc_(2)-incorporated twice spincoating(PTS) process to address these ***,PbAc_(2) was added to the CsPbI_(2)Br precursor solution to form a CsPbI_(2)Br film,which was then coated with the CsPbI_(2)Br precursor solution to produce the PTS film,Ac^(-)can delay the perovskite crystallization,leading to the formation of thicker and denser CsPbI_(2)Br ***,lone-pair electrons of the oxygen atom provided by Ac^(-)formed coordination bonds with under-coordinated Pb~(2+) ions to fill halogen ion vacancies,thereby reducing the defect ***,the PTS CsPbI_(2)Br device achieved a peak power conversion efficiency(PCE) of 16.19% and maintained 96.7% of its initial PCE over 1500 h at room temperature under 25% relative humidity without any encapsulation.

关键词： CsPbI_(2)Br Twice spin-coating process PbAc_(2) Crystallization management Perovskite solar cells

Overview of hydro–wind–solar power complementation development in china

在线全文

学校读者我要写书评

暂无评论

Global energy Interconnection 2019年第4期2卷 285-289页

作者： Sheng’an Zheng Gangliang Qian china renewable energy Engineering institute china renewable energy Engineering institute

1Introduction Hydropower generation in china started over a century ago, greatly contributing to their economic and social development. Wind power and photovoltaic (PV) power generation began on a large scale in the 2... 详细信息

关键词： solar power complementation Overview of hydro

Roles of furfural during the thermal treatment of bio-oil at low temperatures

在线全文

学校读者我要写书评

暂无评论

Journal of energy Chemistry 2020年第11期29卷 85-95页

作者： Zhe Xiong Yuanjing Chen Muhammad Mufti Azis Xun Hu Wei Deng Hengda Han Long Jiang Sheng Su Song Hu Yi Wang Jun Xiang State Key Laboratory of Coal Combustion School of Energy and Power EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina Chemical Engineering Department Faculty of EngineeringGadjah Mada UniversityYogyakarta 55281Indonesia School of Material Science and Engineering University of JinanJinan 250022ShandongChina china-eu institute for clean and renewable energy Huazhong University of Science and TechnologyWuhan 430074HubeiChina

The reactive O-containing species in bio-oil could induce the polymerization of bio-oil during its thermal treatment, which affects the relevant utilization of bio-oil significantly. Furans, as the highly reactive Ocontaining species in bio-oil, play important roles during the thermal treatment of bio-oil. In this study,furfural was chosen as the representative of the furans in bio-oil to investigate its roles during the thermal treatment of bio-oil. The raw bio-oil with and without the addition of extra furfural(10 wt% of bio-oil) and pure furfural were pyrolyzed in a fixed-bed reactor at 200–500 ℃. The results show that the interactions among furfural and bio-oil components can take place prior to the evaporation of furfural(<140 ℃) to form the intermediates, then these intermediates could be further polymerized to form large molecular compounds, and coke can be formed via the interactions at temperatures ≥ 300 ℃. At temperatures ≤ 300 ℃, furfural mainly interacts with anhydrosugars. As the temperature further increases, the aromatics are involved in the interactions to form coke. The increased percentage of the coke formed via the interactions is in a linear relation with the conversion of furfural during the pyrolysis at 300–500 ℃(no coke formed at 200 ℃). Meanwhile, more non-aromatic light components(≤ C6) and less aromatics in the tars could be formed due to the interactions.

关键词： Bio-oil Furfural Aromatic Coke Polymerization Interaction

Optimal reactive power dispatch of wind power plant cluster considering static voltage stability for low-carbon power system

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and clean energy 2015年第1期3卷 114-122页

作者： Shuo YANG Weisheng WANG Chun LIU Yuehui HUANG renewable energy Department China Electric Power Research InstituteBeijing 100192China

The implementation of developing the wind power is an important way to achieve the low-carbon power ***,the voltage stability issues caused by the random fluctuations of active power output and the irrational regulations of reactive power compensation equipment have become the prominent problems of the regions where large-scale wind power *** view of these problems,this paper proposed an optimal reactive power dispatch(ORPD)strategy of wind power plants cluster(WPPC)considering static voltage stability for lowcarbon power *** control model of the ORPD strategy was built according to the wind power prediction,the present operation information and the historical operation *** utilizing the automatic voltage control capability of wind power plants and central substations,the ORPD strategy can achieve differentiated management between the discrete devices and the dynamic devices of the *** results of an actual WPPC in North china show that the ORPD strategy can improve the voltage control performance of the pilot nodes and coordinate the operation between discrete devices and the dynamic devices,thus maintaining the static voltage stability as well.

关键词： Low-carbon power system Wind power plants cluster Optimal reactive power dispatch Wind power prediction Static voltage stability

An Unprecedented Efficiency with Approaching 21%Enabled by Additive‑Assisted Layer‑by‑Layer Processing in Organic Solar Cells

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 372-375页

作者： Shuai Xu Youdi Zhang Yanna Sun Pei Cheng Zhaoyang Yao Ning Li Long Ye Lijian Zuo Ke Gao Key Laboratory of Advanced Green Functional Materials College of ChemistryChangchun Normal UniversityChangchun 130032People’s Republic of China Shandong Provincial Key Laboratory for Science of Material Creation and energy Conversion School of Chemistry and Chemical EngineeringShandong UniversityQingdao 266237People’s Republic of China College of Polymer Science and Engineering Sichuan UniversityChengdu 610065People’s Republic of China State Key Laboratory and institute of Elemento‑Organic Chemistry Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer MaterialsRenewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin 300071People’s Republic of China institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640People’s Republic of China Tianjin Key Laboratory of Molecular Optoelectronic Sciences School of Materials Science and EngineeringTianjin UniversityTianjin 300350People’s Republic of China State Key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China

Recently published in Joule,Feng Liu and colleagues from Shanghai Jiaotong University reported a record-breaking 20.8%power conversion efficiency in organic solar cells(OSCs)with an interpenetrating fibril network active layer morphology,featuring a bulk p-in structure and proper vertical segregation achieved through additive-assisted layer-by-layer *** optimized hierarchical gradient fibrillar morphology and optical management synergistically facilitates exciton diffusion,reduces recombination losses,and enhances light capture *** approach not only offers a solution to achieving high-efficiency devices but also demonstrates the potential for commercial applications of OSCs.

关键词： Organic solar cells Additive-assisted layer-by-layer processing Three-dimensional fibril morphology Bulk p-i-n structure Optical management

Discharge characteristics of coal and extraction residue from direct coal liquefaction in partial fluidization silo

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2022年第12期52卷 78-87页

作者： Zhen Liu Haiquan An Jiansheng Zhang Department of energy and Power Engineering Tsinghua UniversityBeijing 100084China National institute of clean-and-Low-Carbon energy Beijing 100084China

Gasification of extraction residue(ER) from direct coal liquefaction with pulverized coal is an efficient way for the utilization of carbonaceous wastes, which improve the overall efficiency of direct coal liquefaction technology. The discharge characteristics of ER mixing with pulverized coal is important paraments for its gasification process, which is seldom studied in the literature. In this study, the discharge characteristics of the pulverized coal(M1) as well as its mixture with ER(M2) were systematically investigated in an atmospheric pressure partial fluidization silo with different fluidization apparent velocity. It was observed that although M2 is a viscous powder with lower flowability than M1, the mass flow rate of M2 is 65% higher than M1 at the 3.7 mm·s-1apparent gas velocity. M2 exhibits the properties of Geldart A type powder, which improves the mass flow rate and stability of the discharged material. The mass flow rate of both M1 and M2 first increases and then slowly decreases with the increase of apparent gas velocity of the fluidizing air, which means the discharge process of M1 and M2 can be optimized by the apparent gas velocity.

关键词： Discharge characteristics Silo Extraction residue Direct coal liquefaction Fluidizing air

Economic Dispatch with High Penetration of Wind Power Using Extreme Learning Machine Assisted Group Search Optimizer with Multiple Producers Considering Upside Potential and Downside Risk

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and clean energy 2022年第6期10卷 1459-1471页

作者： Yuanzheng Li Jingjing Huang Yun Liu Zhixian Ni Yu Shen Wei Hu Lei Wu School of Artificial Intelligence and Automation Huazhong University of Science and TechnologyWuhan 430074China china-eu institute for clean and renewable energy Huazhong University of Science and TechnologyWuhan 430074China School of Electric Power Engineering South China University of TechnologyGuangzhou 510641China State Grid Hubei Power Electric Research institute Wuhan 430077China Department of Electrical&Computer Engineering Stevens Institute of TechnologyHoboken USA IEEE

The power system with high penetration of wind power is gradually formed,and it would be difficult to determine the optimal economic dispatch(ED)solution in such an environment with significant *** paper proposes a multi-objective ED(MuOED)model,in which the expected generation cost(EGC),upside potential(USP),and downside risk(DSR)are simultaneously *** heterogeneous indices of upside potential and downside risk mean the potential economic gains and losses brought by high penetration of wind power,***,the MuOED model is formulated as a tri-objective optimization problem,which is related to uncertain multi-criteria decision-making against ***,the tri-objective optimization problem is solved by an extreme learning machine(ELM)assisted group search optimizer with multiple producers(GSOMP).Pareto solutions are obtained to reflect the trade-off among the expected generation cost,the upside potential,and the downside *** a fuzzy decision-making method is used to choose the final ED *** studies based on the Midwestern US power system verify the effectiveness of the proposed MuOED model and the developed optimization algorithm.

关键词： Economic dispatch(ED) wind power extreme learning machine optimization algorithm

Unveiling the promotion role of ZnO on Zn-Al spinel oxide for CO2 hydrogenation

在线全文

学校读者我要写书评

暂无评论

Journal of energy Chemistry 2025年第1期 18-25页

作者： Tongyao Wang Xinlong Yao Lixin Liang Hongyu Chen Pan Gao Guangjin Hou State Key Laboratory of Catalysis Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences University of Chinese Academy of Sciences

The Zn-Al spinel oxide stands out as one of the most active catalysts for high-temperature methanol synthesis from CO2hydrogenation. However, the structure–activity relationship of the reaction remains poorly understood due to challenges in atomic-level structural characterizations and analysis of reaction intermediates. In this study, we prepared two Zn-Al spinel oxide catalysts via coprecipitation（ZnAl-C）and hydrothermal（ZnAl-H） methods, and conducted a comparative investigation in the CO2hydrogenation reaction. Surprisingly, under similar conditions, ZnAl-C exhibited significantly higher selectivity towards methanol and DME compared to ZnAl-H. Comprehensive characterizations using X-ray diffraction（XRD）, Raman spectroscopy and electron paramagnetic resonance（EPR） unveiled that ZnAl-C catalyst had abundant ZnO species on its surface, and the interaction between the ZnO species and its ZnAl spinel oxide matrix led to the formation of oxygen vacancies, which are crucial for CO2adsorption and activation. Additionally, state-of-the-art solid-state nuclear magnetic resonance（NMR） techniques,including ex-situ and in-situ NMR analyses, confirmed that the surface ZnO facilitates the formation of unique highly reactive interfacial formate species, which was readily hydrogenated to methanol and DME. These insights elucidate the promotion effects of ZnO on the ZnAl spinel oxide in regulating active sites and reactive intermediates for CO2-to-methanol hydrogenation reaction, which is further evidenced by the significant enhancement in methanol and DME selectivity observed upon loading ZnO onto the ZnAl-H catalyst. These molecular-level mechanism understandings reinforce the idea of optimizing the ZnO-ZnAl interface through tailored synthesis methods to achieve activity-selectivity balance.

关键词：

Geometric optimization model for the solar cavity receiver with helical pipe at different solar radiation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Frontiers in energy 2019年第2期13卷 284-295页

作者： Chongzhe ZOU Huayi FENG Yanping ZHANG Quentin FALCOZ Cheng ZHANG Wei GAO School of energy and Power Engineering Huazhong University of Science and TechnologyWuhan 430074China china-eu institute for clean and renewable energy Huazhong University of Science and TechnologyWuhan 430074China School of energy and Power Engineering China-EU Institute for Clean and Renewable EnergyHuazhong University of Science and TechnologyWuhan 430074China PROMES-CNRS Laboratory 7 rue du Four Solaire66120 Font-Romeu-Odeillo-viaFrance

In consideration of geometric parameters, several researches have already optimized the thermal efficiency of the cylindrical cavity receiver. However, most of the optimal results have been achieved at a fixed solar radiation. At different direct normal irradiance (DNI), any single optimal result may not be suitable enough for different regions over the world. This study constructed a 3-D numerical model of cylindrical cavity receiver with DNI variation. In the model of a cylindrical cavity receiver containing a helical pipe, the heat losses of the cavity and heat transfer of working medium were also taken into account. The simulation results show that for a particular DNI in the range of 400 W/m2 to 800 W/m2, there exists a best design for achieving a highest thermal efficiency of the cavity receiver. Besides, for a receiver in constant geometric parameters, the total heat losses increases dramatically with the DNI increasing in that range, as well as the temperature of the working medium. The thermal efficiency presented a different variation tendency with the heat losses, which is 2.45% as a minimum decline. In summary, this paper proposed an optimization method in the form of a bunch of fitting curves which could be applied to receiver design in different DNI regions, with comparatively appropriate thermal performances.

关键词： cylindrical cavity receiver 3-D numerical simulation geometric optimization direct normal irradia-tion

Frequency comparative study of coal-fired fly ash acoustic agglomeration

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2011年第11期23卷 1845-1851页

作者： Jianzhong Liu Jie Wang Guangxue Zhang Junhu Zhou Kefa Cen State Key Laboratory of clean energy Utilization Zhejiang UniversityHangzhou 310027China institute for energy Engineering China Jiliang UniversityHangzhou 310018China

Particulate pollution is main kind of atmospheric *** fine particles are seriously harmful to human health and *** agglomeration is considered as a promising pretreatment technology for fine particle *** mechanisms of acoustic agglomeration are very complex and the agglomeration efficiency is affected by many *** most important and controversial factor is *** studies between high-frequency and low-frequency sound source to agglomerate coal- fired fly ash were carried out to investigate the influence of frequency on agglomeration *** agglomeration theoretical analysis,experimental particle size distributions （PSDs） and orthogonal design were *** results showed that the 20 kHz high-frequency sound source was not suitable to agglomerate coal-fired fly *** within the size ranging from 0.2 to 0.25 μm the particles agglomerated to adhere together,and the agglomerated particles were smaller than 2.5 μ*** application of low-frequency （1000–1800 Hz） sound source was proved as an advisable pretreatment with the highest agglomeration efficiency of 75.3%,and all the number concentrations within the measuring range *** design L16 （4） 3 was introduced to determine the optimum frequency and optimize acoustic agglomeration *** to the results of orthogonal analysis,frequency was the dominant factor of coal-fired fly ash acoustic agglomeration and the optimum frequency was 1400 Hz.

关键词： coal-fired fly ash acoustic agglomeration frequency agglomeration kernel orthogonal design