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[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) - Effective Series-Parallel Cell Configuration in Solar Panels for FPM Power Generation Forest
摘要： Three-dimensional (3D) Fibonacci number photovoltaic modules (FPMs), which are designed in part based on natural plant leaf phyllotaxis, have previously been proposed as a means of efficiently collecting solar energy over the course of a day. When multiple FPMs are installed in the same area, they can be arranged like trees in a forest. As part of efforts to realize such power generation forests, this study uses simulations and experiments to clarify the relationship between the cell configurations within a solar cell panel and the power generation that occurs when an adjacent FPM is installed.
关键词： shadow,FPM,solar cell module,3-dimensional photovoltaic module,cell configuration,power generation forest
更新于2025-09-04 15:30:14
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[IEEE 2018 IEEE 4th International Forum on Research and Technology for Society and Industry (RTSI) - Palermo, Italy (2018.9.10-2018.9.13)] 2018 IEEE 4th International Forum on Research and Technology for Society and Industry (RTSI) - Conductive Free Standing Polymer Paste Synthesized by Acid Induced Phase Separation
摘要： PEDOT:PSS is one of the most studied and used polymers. The current literature shows that this material is employed in solar cells, electrochemical cells, devices for energy storage and stretchable electronics. However films with thickness in the scale of hundreds of nanometres have the intrinsic limitation that must be deposited onto a solid and consistent substrate, thus leading to bulky devices. Moreover pristine PEDOT:PSS exhibits thus several treatments, such as drop casting or acid vapours exposure, are usually pursued to increase it. These methods however are not easily implementable in production lines. Here we show a free-standing conductive dark-PEDOT (d-PEDOT), obtained by a low cost and fast in-solution treatment by sulphuric acid. The proposed synthesis procedure is based on methods industrially implementable. The obtained paste is mouldable and allows for the fabrication of free-standing tens of μm thick foils, made as easily as scribing by an ink pen. Electrical characterization shows a conductivity of 500 Scm-1, which makes the new material a good alternative to standard and expensive metal contacts.
关键词： free-standing,electrodes,PEDOT:PSS,solar cells
更新于2025-09-04 15:30:14
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[IEEE 2018 IEEE International Students' Conference on Electrical, Electronics and Computer Science (SCEECS) - Bhopal, India (2018.2.24-2018.2.25)] 2018 IEEE International Students' Conference on Electrical, Electronics and Computer Science (SCEECS) - Improving the output power of Solar PV Array under different irradiation conditions
摘要： The factors that influence the output power of Solar Photo-Voltaic (SPV) Array are temperature of the Photo Voltaic cell, solar insolation and shading pattern. Partial shading is the main disadvantage that occurs while reducing the output power of the SPV Energy. To counter this disadvantage, a new reconfiguration technique Tom-Tom configuration is used to reconfigure the Solar Photo-Voltaic (SPV) Array to enhance the output power under partial shaded conditions. The theoretical and MATLAB/Simulink results give the ‘PV’ characteristics for the conventional and proposed techniques. From the results, it can be inferred that more output power is provided by Tom-Tom configuration than the conventional Total Cross Tied (TCT) pattern and the multiple peaks are minimized. Shade dispersion concept is presented by Tom-Tom, using which the concentrated shaded is diluted. The various shading patterns those are available in the literature are used to verify the performance of the proposed system. Results reaffirm that the output power is increased if the shaded panels are relocated.
关键词： Partial Shading,Solar PV Array,Tom-Tom Configuration
更新于2025-09-04 15:30:14
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Understanding Interactions between Lead Iodide Perovskite Surfaces and Lithium Polysulfide toward New-Generation Integrated Solar-Powered Lithium Battery: an ab-Initio Investigation
摘要： Energy conversion devices such as perovskite solar cells and energy storage devices such as lithium sulfur battery flourish in these decades owing to their capabilities to deliver large power conversion efficiency and store superior specific energy, with potentials to solve the global energy crisis and environmental issues. Compared with conventional energy conversion devices and energy storage devices that have limited performances, integrating the energy conversion devices and energy storage devices into a single unit is advantageous to present enhanced performance in multiple applications and satisfy the commercial needs. However, further development of the integration relies on a deeper understanding of the interactions between the functional materials in the energy conversion devices and energy storage devices. In this study, we try to bridge the gap by investigating the interactions between the light absorbing halide perovskite material CH3NH3PbI3 and the lithium polysulfide intermediates (S8, Li2S8, Li2S6, Li2S4, Li2S2 and Li2S) formed during the charging/discharging processes in lithium sulfur batteries via ab-initio calculations. We find that the CH3NH3PbI3 and lithium polysulfide species have decent interactions, with the lithium polysulfide species residing stably on the halide perovskite surfaces and such interactions are strengthened by the charge transfer characters between the adsorbates and the adsorbents. We propose that the light absorbing halide perovskite materials represented by the CH3NH3PbI3 absorber exhibit potentials to be integrated into the lithium sulfur battery cathode to serve as an anchoring material to harness the solar power and mitigate the battery degradation problem, since the dissolution of intermediate lithium polysulfide (Li2Sn) is a severe problem in lithium sulfur batteries. The resulting integrated device is superior in capturing the solar energy due to the presence of the halide perovskite moiety and exhibits a large specific energy, low cost and low toxicity due to the sulfur materials. The comprehensive understanding of the light absorbing halide perovskite material and the lithium polysulfide species in this theoretical work forms a foundation for the further development and commercialization of integrated device that captures solar energy and can be charged/discharged efficiently.
关键词： perovskite solar cells,energy storage,energy conversion,integrated device,lithium polysulfide,lithium sulfur battery,ab-initio calculations,CH3NH3PbI3
更新于2025-09-04 15:30:14
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Influence of Disorder and Anharmonic Fluctuations on the Dynamical Rashba Effect in Purely Inorganic Lead-Halide Perovskites
摘要： Doping organic metal-halide perovskites with cesium could be the best solution to stabilize highly-efficient perovskite solar cells. The understanding of the respective roles of the organic molecule, on one hand, and the inorganic lattice, on the other, is thus crucial in order to be able to optimize the physical properties of the mixed-cation structures. In particular, the study of the recombination mechanisms is thought to be one of the key challenges towards full comprehension of their working principles. Using molecular dynamics and frozen phonons, we evidence sub-picosecond anharmonic fluctuations in the fully inorganic CsPbI3 perovskite. We reveal the effect of these fluctuations, combined with spin-orbit coupling, on the electronic band structure, evidencing a dynamical Rashba effect. Our study shows that under certain conditions space disorder can quench the Rashba effect. As for time disorder, we evidence a dynamical Rashba effect which is similar to what was found for MAPbI3 and which is still sizable despite temperature disorder, the large investigated supercell, and the absence of the organic cations’ motion. We show that the spin texture associated to the Rashba splitting cannot be deemed responsible for a consistent reduction of recombination rates, although the spin mismatch between valence and conduction band increases with the ferroelectric distortion causing the Rashba splitting.
关键词： spin-orbit coupling,perovskite solar cells,Rashba effect,molecular dynamics,CsPbI3
更新于2025-09-04 15:30:14
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[ASME ASME 2017 Power Conference Joint With ICOPE-17 collocated with the ASME 2017 11th International Conference on Energy Sustainability, the ASME 2017 15th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2017 Nuclear Forum - Charlotte, North Carolina, USA (Monday 26 June 2017)] Volume 2: I&C, Digital Controls, and Influence of Human Factors; Plant Construction Issues and Supply Chain Management; Plant Operations, Maintenance, Aging Management, Reliability and Performance; Renewable Energy Systems: Solar, Wind, Hydro and Geothermal; Risk Management, Safety and Cyber Security; Steam Turbine-Generators, Electric Generators, Transformers, Switchgear, and Electric BOP and Auxiliaries; Student Competition; Thermal Hydraulics and Computational Fluid Dynamics - Heat Transfer Performance of LiF–NaF–KF Salt in a Corrugated Receiver Tube With Non-Uniform Solar Flux
摘要： The heat flux on the receiver tube is non-uniform because of uneven solar flux and receiver structure, which causes overheating and thermal stress failure of receiver and affected safe operations of the Concentrated Solar Power(CSP) system. In order to reduce the temperature difference in receiver tube wall and improve the efficiency of CSP system, the ternary eutectic salt LiF–NaF–KF (46.5–11.5–42 wt.%, hereafter FLiNaK), which has a better high thermal stability than that of nitrate salts at operating temperature of 900 °C, is selected as HTF, and heat transfer performance of FLiNaK in a corrugated receive tube with non-uniform heat flux is simulated by CFD software in the present work. The numerical results reveal that the non-uniform heat flux has a great influence on the temperature distributions of the receive tube and FLiNaK salt. Compared with the result of bare tube, the corrugated tube can not only significantly reduce the temperature difference in tube wall and salt by improving the uniformity of temperature distribution but also enhance the heat transfer of the salt, where the heat transfer coefficient increases with the Reynolds number and heat flux. Moreover, the enhanced effect of the corrugated tube depends on both the pitch and the height of ridges. It is found that the heat transfer coefficient of the salt gets a maximum when the ratio of the height of ridge to the pitch is 0.2. The research presented here may provide guidelines for design optimization of receiver tube in CSP system.
关键词： heat transfer,FLiNaK,non-uniform heat flux,corrugated tube,Concentrated Solar Power
更新于2025-09-04 15:30:14
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Dynamic Characteristics of Satellite Solar Arrays under the Deployment Shock in Orbit
摘要： Understanding the dynamic characteristics of solar arrays is important for satellite structural design and attitude control design. Considerable theoretical researches have been carried out towards this problem, but they have not been supported by actual orbit data from outer space yet. In this paper, the on-orbit vibration characteristic data of solar arrays under the deployment shock are measured by using vibration measurement apparatuses based on structural strain. With these valuable experimental data, more eigenfrequencies of the solar arrays in the microgravity environment are obtained, and the prediction that the vibration of solar arrays will have larger amplitude and longer decay time under vacuum conditions is veri?ed. Moreover, by comparing the eigenfrequency of main vibration under the space condition with that under the ground condition, the accurate value of the system damping ratio is gained, which has an important guideline signi?cant for the structural design of solar arrays.
关键词： solar arrays,deployment shock,on-orbit data,vibration measurement,dynamic characteristics
更新于2025-09-04 15:30:14
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AIP Conference Proceedings [Author(s) INTERNATIONAL CONFERENCE ON SUSTAINABLE ENGINEERING AND TECHNOLOGY (ICONSET 2018) - Karnataka, India (19–20 April 2018)] - Design and development of solar panel tracking mechanism
摘要： The solar power is quickly gaining significance since an energy reserve as fossil oil costs vary. With ordinary fixed solar panel we can’t get maximum utilization of sun radiation that is why we are using a single axis solar tracking system which will continuously track the sun radiation, so that the angle of incident of solar radiation with the solar panel should always perpendicular to get maximum efficiency of solar incident radiation. The daylight dependent resistors carry out the work of sensing the vary in the location of the sun, that is dealing with the particular modify in the solar plate location by switching on and off the motor. The direct circuit does the work of supply the input from the sensor also gives demand towards the motor to run during order to attempt the modify in the sun’s position. It has been found that the solar tracking system can gather about 17.72% extra power than fixed panel structure and thus more effectiveness are achieved through this mechanism.
关键词： energy,mechanism,renewable,tracking,solar panel
更新于2025-09-04 15:30:14
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AIP Conference Proceedings [Author(s) INTERNATIONAL CONFERENCE ON SUSTAINABLE ENGINEERING AND TECHNOLOGY (ICONSET 2018) - Karnataka, India (19–20 April 2018)] - Solar hybrid vehicle
摘要： Automobiles were invented in 18th century, it was categorized based on fuel, propulsion and later it was categorized by its exterior looks. During 18th century internal combustion engines used hydrogen as its fuel and then later on gasoline/diesel engines were invented. By 20th century the need for electric vehicles increased as there was scarcity of fossil fuel, increase in carbon emissions because of internal combustion engines and also other harmful effects causing to the environment. Electric vehicles has limited range per complete charge, which created a necessity to develop new energy sources to power the electric motors and there is huge demand for newer methods in order to increase the range and the power of electric vehicle’s which has lead to the development of hybrid vehicles. In this paper the development of hybrid vehicles, its types and many other futuristic concepts would be discussed.
关键词： parallel hybrid,solar hybrid,series hybrid,HEV,electric vehicles,Hybrid cars
更新于2025-09-04 15:30:14
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[IEEE 2018 IEEE Energy Conversion Congress and Exposition (ECCE) - Portland, OR, USA (2018.9.23-2018.9.27)] 2018 IEEE Energy Conversion Congress and Exposition (ECCE) - Energy Management Strategy of Solar PV-Battery and Diesel Generator Based Electric Vehicle Charging Station
摘要： This paper presents a smart strategy for a charging station in which a single voltage source converter (VSC) does a multiple task such as power management among different energy sources and charging the electric vehicles (EVs), regulation of voltage and frequency of the generator, harmonics current compensation of nonlinear loads. The charging strategy is designed such that it primarily takes power from the solar photovoltaic (PV) array and a storage battery. In absence of these two sources, the charging station wisely takes power from the grid and the squirrel cage induction generator (SEIG) based diesel generator (DG) set. The DG set is operated such that it generates up to 33% more power than it rated capacity without surpassing the rated current in the windings, therefore, the size of the DG is reduced. Moreover, the voltage and frequency of the generator, are regulated at its rated values without a mechanical speed governor.
关键词： Uninterruptible Power,EV Charging Station,Power Quality,DG Set,Solar PV Generation
更新于2025-09-04 15:30:14