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oe1(光电查) - 科学论文

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出版时间
  • 2019
  • 2018
  • 2014
研究主题
  • solar cell
  • hybrid-resonant PWM switching
  • PWM switching
  • MPPT
  • resonant converter
  • solar power
  • Geostationary satellite images
  • Global and direct solar radiation
  • Meteorological station
  • validation
应用领域
  • Electrical Engineering and Automation
  • New Energy Science and Engineering
  • Optoelectronic Information Science and Engineering
  • Optoelectronic Information Materials and Devices
  • Applied Physics
机构单位
  • National technical University “Kharkiv Polytechnic Institute”
  • University of évora
  • Fraunhofer Institute for Solar Energy Systems ISE
  • University of Tunis El Manar
  • Zeal College of Engineering and Research
  • Northern (Arctic) Federal University named after M.V. Lomonosov
  • Cochin University College of Engineering
  • National Renewable Energy Laboratory
  • NED University
  • Universidad Veracruzana
4089 条数据
?? 中文（中国） ▾

  • A performance and technoeconomic study of different geometrical designs of compact single-pass cross-matrix solar air collector with square-tube absorbers

    摘要： This manuscript presents a performance study on a forced convection single-pass solar air heater channel with compact cross-matrix absorber (CMA) incorporating metal hollow square-tube absorbers. Four different geometries of CMA (Type I, II, III and IV) were investigated experimentally to evaluate their efficiency, pressure drops and heat transfer parameters. The experiments were conducted with uniform heat flux (indoor) and outdoor solar radiation as heat source. The air mass flow rates used were between 0.0142 kg/s and 0.0360 kg/s. Techno-economic feasibility studies were conducted using cost-benefit ratio (AC/AEG) method. Thermal efficiency of the CMA obtained by Type I with 76%, being the highest. CMA Type I also exhibited the highest temperature elevation than other configurations with 15.3 °C and thermal capacity of 38.7 kJ. Maximum pressure drop obtained was 1.33 Pa in turbulent condition with Reynolds number of 50,794. Type I has the advantage of high performance CMA and has comparatively lower cost-benefit ratio (AC/AEG) of 0.15 RM/kWh than other type of thermal absorbers.

    关键词： Thermal absorber design,Solar air collector,Cross-matrix absorber

    更新于2025-09-23 15:23:52

  • Assessment of concentrated solar power (CSP) technologies based on a modified intuitionistic fuzzy topsis and trigonometric entropy weights

    摘要： Concentrated solar power (CSP) technology has shown considerable long-term growth with varying levels of peak development and stall phases over the years. More and more countries are finding CSP technology attractive for the production of electricity and other applications. CSP offers a variety of applications where solar power can be used appropriately, although the debate about which CSP technology has a better future perspective is still ongoing. This technology sector has seen a multitude of advancements and technological innovations. These improvements are primarily concerned with the design of the collectors and the related materials they are made from, the heat transfer processes, and the production and accumulation of energy. In order to assess these CSP technologies, in this paper we propose a fuzzy multi-criteria method. Then, Solar tower (ST), Parabolic solar trough (PST), Compact linear Fresnel reflector (CLFR), and Dish Stirling (DS) are evaluated using a modified intuitionistic fuzzy TOPSIS with a trigonometric entropy vector weight.

    关键词： Sustainability,Concentrated solar power (CSP),Trigonometric entropy,Technological assessment,Intuitionistic fuzzy TOPSIS

    更新于2025-09-23 15:23:52

  • Surface-Immobilized Conjugated Polymers Incorporating Rhenium Bipyridine Motifs for Electrocatalytic and Photocatalytic CO <sub/>2</sub> Reduction

    摘要： The solar-driven conversion of CO2 to value-added products provides a promising route for solar energy storage and atmospheric CO2 remediation. In this report, a variety of supporting electrode materials were successfully modified with a [2,2′-bipyridine]-5,5′-bis(diazonium) rhenium complex through a surface-localized electropolymerization method. Physical characterization of the resulting multilayer films confirms that the coordination environments of the rhenium bipyridine tricarbonyl sites are preserved upon immobilization and that the polymerized catalyst moieties exhibit long-range structural order with uniform film growth. UV?vis studies reveal additional absorption bands in the visible region for the polymeric films that are not present in the analogous rhenium bipyridine complexes. Electrochemical studies with modified graphite rod electrodes show that the electrocatalytic activity of these films increases with catalyst loading up to an optimal value, beyond which electron and mass transport through the material become rate-limiting. Electrocatalytic studies performed at ?2.25 V vs Fc/Fc+ for 2 h reveal CO production with faradaic efficiencies and turnover numbers up to 99% and 3606, respectively. Photocatalytic studies of the modified TiO2 devices demonstrate enhanced activity at low catalyst loadings, with turnover numbers up to 70 during 5 h of irradiation.

    关键词： metallopolymers,surface modification,photocatalysis,rhenium bipyridine,solar energy conversion,electrocatalysis

    更新于2025-09-23 15:23:52

  • [IEEE 2018 7th International Conference on Renewable Energy Research and Applications (ICRERA) - Paris, France (2018.10.14-2018.10.17)] 2018 7th International Conference on Renewable Energy Research and Applications (ICRERA) - Biomass Free Piston Stirling Engine Generator with PV

    摘要： Proposed hybrid electric power generation system is constituted from Free Piston Stirling engine generator and solar photovoltaic system. Free Piston Stirling engine electric generator uses biomass, such as wood pellets as the heat source. This system produces maximum output of 1.6kW and 45°C 200L hot water with linear generator. This paper studied the control of output voltage of Free Piston Stirling Engine. ILQ (Inverse Linear Quadratic) control theory is used to keep output active power between 400W and 500W. In long range time constant of burning system and in short range time constant of electrical circuit, experiment yields temperature of FPSEG head between upper limit and lower limit.

    关键词： hybrid system,Free Piston Stirling Engine,biomass,solar power,ILQ control

    更新于2025-09-23 15:23:52

  • Direct utilization of solar linear Fresnel reflector on multi-effect eccentric horizontal tubular still with falling film

    摘要： The paper presents a multi-eccentric tubular desalination system heated directly by a linear Fresnel reflector (LFR) field to enhance the productivity. In this novel system, the solar radiation is sent directly into desalination unit. The configuration and working processes of the proposed design are described in details. The tube inner wall with absorbing coating were used as a receiver by placing in the cylindrical cavity to absorb concentrated solar energy and transfer it to a falling water film. To verify the performance of the system in different effects, an indoor experimental eccentric tubular still was fabricated and tested under different heating conditions from 400 to 1600 W respectively. The experimental results showed that the maximum accumulated yield of the 1st and 2nd effect are about 28.27 kg and 21.37 kg, respectively. The outdoor experimental results show that the cumulative output of the unit is about 11.35 kg, the maximum performance ratio (PR) is about 2.88 with an evacuated tube solar collector. A two-effect tubular desalination system for linear Fresnel reflector with a capacity of 63.68 kg/d was proposed according to the presented theoretical and experimental work. By taking solar linear Fresnel reflector heating mode, the cost of water production reaching about $6.16/ton.

    关键词： Falling water film,Heat and mass transfer,Solar distillation,Horizontal tubular still,Multi-eccentric

    更新于2025-09-23 15:23:52

  • Coordinated control of MPPT and voltage regulation using single-stage high gain DC–DC converter in a grid-connected PV system

    摘要： In general, grid-connected PV system uses two stages of DC-DC converter to accomplish Maximum Power Point Tracking (MPPT) and DC voltage regulation. In order to overcome the two stage conversion, a single stage high gain DC-DC converter is presented in this paper. The operation of three switches with two different duty ratio is the main advantage of this converter to accomplish the coordinated control of MPPT and DC voltage regulation. This coordinated control also helps to provide constant DC voltage to the DC loads though the inverter is disconnected from the DC bus. A 1KW grid-connected PV system with the proposed DC-DC converter is developed and is validated using OP4500 Real-Time test platform. In addition, a decoupled control strategy with fractional order proportional-integral (FOPI) controller is implemented at the inverter end. Also, the reactive power compensation, harmonic reduction (less than 5% as per the IEEE 519 standard) and the grid power factor close to unity is obtained and the results are validated using the real-time simulator.

    关键词： Solar photovoltaics,LCL filter,Coordinated control of MPPT and voltage regulation,High gain DC-DC converter,Grid integration and power quality

    更新于2025-09-23 15:23:52

  • A review on photoelectrochemical hydrogen production systems: Challenges and future directions

    摘要： Water photolysis is a fundamental concept in which solar-driven water splitting is utilized to generate renewable hydrogen fuel using semiconductor-based electrochemical systems. The engineering design principles for each system configuration, including single, dual/tandem photoelectrodes, tandem photoelectrochemical-photovoltaic, and multi-junction designs are reviewed. Modeling and numerical simulation of photoelectrochemical processes based on up-to-date multi-scale analysis are presented and discussed. In addition, the achievements made in semiconductor photoelectrode materials and the rational engineering methods needed to improve the solar to hydrogen efficiency are demonstrated. Furthermore, some key accomplishments in different aspects, such as electron-hole recombination, stability, photocorrosion, energy band gap, and photocurrent density are discussed. Moreover, key points on the challenges, opportunities and future directions towards commercialization of viable photoelectrochemical reactors are discussed.

    关键词： Semiconductor materials,Photoelectrochemical process,Hydrogen production,Solar energy

    更新于2025-09-23 15:23:52

  • A path-finding toward high-efficiency penternary Cu(In,Ga)(Se,S)2 thin film solar module

    摘要： The optimal p-n junction structure in a state-of-the-art Cu(In,Ga)(Se,S)2 thin-film solar module technology is investigated. For co-optimization design and path-finding, a TCAD model is developed with experimental samples. The engineerable parameters, i.e., FGa, GGIavg, and CdS thickness, are demonstrated to play a critical role in determining the p-n junction properties such as dark current characteristics Jdark(V), voltage-dependent photocurrent, localized carrier collection efficiency, and interface carrier transportation. We show the optimal Ga-grading is determined by a trade-off between the recombination loss in space charge region and the photo-carrier collection in quasi-neutral region. The optimal CdS thickness is determined by a trade-off between carrier collection efficiency, short-circuit current (JSC) loss, and Jdark(V), which depends on varied Ga-profiles. Overall, thin CdS (≦10 nm) is preferred to reduce the JSC loss in accumulated Ga-profiles, while thicker CdS is preferred to enhance the carrier collection efficiency in flatter Ga-profiles. The band alignment effect on varied Cu(In,Ga)(Se,S)2/CdS junctions is also investigated. It is found sulfur-incorporation can suppress the VOC saturation behavior at wide bandgap. For CIGSeS absorber with SS = 20% and DP =15%, the maximum VOC of 780 mV can be achieved by co-optimized Ga-profile. Furthermore, varied Ga-profiles and CdS buffer layers are explored for pathfinding. An optimal p-n junction structure shows a relative +40% efficiency improvement from 15.5% to 21.9%. This work shows the efficiency headroom of reported CIGSeS thin-film solar module technology through co-optimized CIGSeS composition gradient and buffer layer.

    关键词： CIGSeS,Path-finding,Simulation,Solar cell

    更新于2025-09-23 15:23:52

  • Sustainable Liquid Luminescent Solar Concentrators

    摘要： Luminescent solar concentrators (LSCs) are photovoltaic (PV) complementary devices to overcome the mismatch between the Si-based PV cells, response and the solar spectrum, allowing PV urban integration. Challenges for the luminescent layer include the use of abundant and sustainable natural organic molecules. Here, LSCs composed of a glass container and based on bundles of cylindrical hollow-core plastic optical fibers filled with aqueous solutions of R-phycoerythrin (R-PE), extracted from Gracilaria sp. algae are presented. The R-PE solutions absorb in the UV/visible spectral range (300–550 nm) and convert this radiation into red-emission (550–700 nm) with a maximum absolute quantum yield of ≈0.39. In this work, LSCs with distinct geometries are reported, in which the R-PE emission yields optical conversion efficiency values up to ≈6.88% and ≈4.74% for a planar device and for a bundle of cylindrical LSCs, respectively, which are the largest values known for liquid-based LCSs using sustainable emitting centres. Moreover, the coupling of the LSCs to commercial Si-based PV devices yields power conversion efficiency values of ≈0.27% (planar) and ≈23.03 × 10?3%, (bundle). These values illustrate the potential of this approach for the development of natural-based LSCs meeting the requirements of reliable, sustainable, and competitive energy systems.

    关键词： sustainability,organic–inorganic hybrids,luminescent solar concentrators,R-phycoerythrin,natural optically active center,bundles

    更新于2025-09-23 15:23:52

  • [Lecture Notes in Computer Science] Hybrid Metaheuristics Volume 11299 (11th International Workshop, HM 2019, Concepción, Chile, January 16–18, 2019, Proceedings) || Optimization of the Velocity Profile of a Solar Car Used in the Atacama Desert

    摘要： Global energy demand has undergone a substantial increase in past decades because of the rapid increase of the global population and the energetic consumption of new production technologies. As a result, a change is necessary in the global energy generating matrix, in which the sources originate primarily from renewable energy sources. The main renewable energy source may be solar energy, and one of its applications is solar mobility. A world-class solar racing car exists that requires a rational use of velocity and energy to minimize the time spent in a race. A total of three search metaheuristics were tested to achieve an efficient velocity profile for this car in the Atacama 2018 Solar Race: Genetic Algorithm, Simulated Annealing and Iterated Local Search. The three methods provided similar results, with Simulated Annealing being the one that provided better solutions.

    关键词： Metaheuristics,Energy management,Solar competition,Hybrid electric vehicle

    更新于2025-09-23 15:23:52