scholarly journals Characterization of Core-Shell Spherical Lens for Microtracking Concentrator Photovoltaic System

Energies ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3517 ◽  
Author(s):  
Masakazu Nakatani ◽  
Noboru Yamada
Keyword(s):  
Incidence Angle ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Photovoltaic System ◽  
Optical Characteristics ◽  
Core Shell ◽  
Spherical Lens ◽  
Optical Efficiency ◽  
Module Efficiency ◽  
Outdoor Experiments

The optical characteristics of a radially symmetrical core-shell spherical (CSSP) lens is analyzed for its suitability to application in microtracking concentrator photovoltaic systems (MTCPVs). The CSSP lens is compared to a conventional homogenous spherical lens through both ray-tracing simulations and outdoor experiments. Simulation results show that the CSSP lens is superior to the conventional homogenous spherical lens in terms of its optical efficiency for long focal lengths, for which the CSSP lens exhibits less spherical and chromatic aberrations. Outdoor experiments are conducted using test concentrator photovoltaic (CPV) modules with prototype CSSP and homogenous spherical lenses; the trend of the measured short circuit current agrees with the that of the simulated optical efficiency for both lenses. Furthermore, compared to the homogenous lens, the CSSP lens significantly increases module efficiency because of its better illumination uniformity at the solar cell surface. The optical characteristics of the CSSP lens are preferable for MTCPVs with a spherical lens array to achieve a higher module efficiency for a wider incidence angle although further studies on more practical system configurations are needed.

A Novel Lens-Walled Compound Parabolic Concentrator for Photovoltaic Applications

2012 ◽  
Vol 134 (2) ◽  
Author(s):  
Yuehong Su ◽  
Gang Pei ◽  
Saffa B. Riffat ◽  
Hulin Huang
Keyword(s):  
Concentration Ratio ◽  
Incidence Angle ◽  
Small Degree ◽  
Photovoltaic System ◽  
Acceptance Angle ◽  
Optical Efficiency ◽  
Concentrate Solar Radiation ◽  
Compound Parabolic Concentrator ◽  
Photovoltaic Applications ◽  
The Common

A compound parabolic concentrator (CPC) is a nonimaging concentrator that can concentrate solar radiation coming within its acceptance angle. A low concentration CPC photovoltaic system has the advantages of reduced Photovoltaics (PVs) cell size, increased efficiency and stationary operation. The acceptance angle of a CPC is associated with its geometrical concentration ratio, by which the size of PV cell could be reduced. Truncation is a way to increase the actual acceptance angle of a mirror CPC, but it also reduces the geometrical concentration ratio. On the other hand, a solid dielectric CPC can have a much larger acceptance angle, but it has a larger weight. To overcome these drawbacks, this study presents a novel lens-walled CPC that has a thin lens attached to the inside of a common mirror CPC or has the lens to be mirror coated on its outside surface. The shape of the lens is formed by rotating the parabolic curves of a CPC by a small degree internally around the top end points of the curves. The refraction of the lens allows the lens-walled CPC to concentrate light from wider incidence angle. The commercial optical analysis software PHOTOPIA is used to verify the principle of the presented lens-walled CPC and examine its optical performance against the common CPCs. As an example, the simulation is aimed to evaluate whether a lens-walled CPC with a geometrical concentration ratio of 4 has any advantage over a common CPC with a geometrical concentration ratio of 2.5 in terms of actual acceptance angle, optical efficiency and optical concentration ratio.

Fabrication of Core-Shell Structured TiO2/MgO Electrodes for Dye-Sensitized Solar Cells

2015 ◽  
Vol 787 ◽  
pp. 3-7 ◽  
Author(s):  
S. Karuppuchamy ◽  
C. Brundha
Keyword(s):  
Solar Cells ◽  
Short Circuit ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Core Shell ◽  
Dye Sensitized ◽  
The Core ◽  
Sensitized Solar Cells

We demonstrated the construction and performance of dye-sensitized solar cells (DSCs) based on nanoparticles of TiO2coated with thin shells of MgO by simple solution growth technique. The XRD patterns confirm the presence of both TiO2and MgO in the core-shell structure. The effect of varied shell thickness on the photovoltaic performance of the core-shell structured electrode is also investigated. We found that MgO shells of all thicknesses perform as barriers that improve open-circuit voltage (Voc) of the DSCs only at the expense of a larger decrease in short-circuit current density (Jsc). The energy conversion efficiency was greatly dependent on the thickness of MgO on TiO2film, and the highest efficiency of 4.1% was achieved at the optimum MgO shell layer.

scholarly journals Controlled Photoanode Properties for Large-Area Efficient and Stable Dye-Sensitized Photovoltaic Modules

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2125
Author(s):  
Wei-Hao Chiu ◽  
Kun-Mu Lee ◽  
Vembu Suryanarayanan ◽  
Jen-Fu Hsu ◽  
Ming-Chung Wu
Keyword(s):  
High Efficiency ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Solution Concentration ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Tio2 Electrode ◽  
Large Area ◽  
Dye Sensitized ◽  
Module Efficiency

Nowadays, a dye-sensitized solar cell (DSSC) attracts attention to its development widely due to its several advantages, such as simple processes, low costs, and flexibility. In this work, we demonstrate the difference in device structures between small size and large size cells (5 cm × 5 cm, 10 cm × 10 cm and 10 cm × 15 cm). The design of the photoanode and dye-sensitized process plays important roles in affecting the cell efficiency and stability. The effects of the TiO2 electrode, using TiCl4(aq) pretreatment and post-treatment processes, are also discussed, whereas, the open-circuit voltage (Voc), short-circuit current density (Jsc), and module efficiency are successfully improved. Furthermore, the effects on module performances by some factors, such as dye solution concentration, dye soaking temperature, and electrolyte injection method are also investigated. We have demonstrated that the output power of a 5 cm × 5 cm DSSC module increases from 86.2 mW to 93.7 mW, and the module efficiency achieves an outstanding performance of 9.79%. Furthermore, enlarging the DSSC modules to two sizes (10 cm × 10 cm and 10 cm × 15 cm) and comparing the performance with different module designs (C-DSSC and S-DSSC) also provides the specific application of polymer sealing and preparing high-efficiency large-area DSSC modules.

scholarly journals Improved Faulted Phase Selection Algorithm for Distance Protection under High Penetration of Renewable Energies

Energies ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 558
Author(s):  
Eduardo Martínez Carrasco ◽  
María Paz Comech Moreno ◽  
María Teresa Villén Martínez ◽  
Samuel Borroy Vicente
Keyword(s):  
Short Circuit ◽  
Renewable Energy Sources ◽  
Short Circuit Current ◽  
Renewable Energies ◽  
Photovoltaic System ◽  
Fault Current ◽  
Distance Protection ◽  
Phase Selection ◽  
High Penetration ◽  
Analysis Of Results

The high penetration of renewable energies will affect the performance of present protection algorithms due to fault current injection from generators based on power electronics. This paper explains the process followed for analyzing this effect on distance protection and the development of a new algorithm that improves its performance in such a scenario. First of all, four commercial protection relays were tested before fault current contribution from photovoltaic system and full converter wind turbines using the hardware in the loop technique. The analysis of results obtained, jointly with a theoretical analysis based on commonly used protection strategy of superimposed quantities, lead to a conclusion about the cause of observed wrong behaviors of present protection algorithms under a high penetration of renewables. According to these conclusions, a new algorithm has been developed to improve the detection of faulted phase selection and directionality on distance protection under a short circuit current fed by renewable energy sources.

Simulation and dSPACE Hardware Implementation of an Improved Fractional Short-Circuit Current MPPT Algorithm for Photovoltaic System

2021 ◽  
Vol 57 (2) ◽  
pp. 93-106
Author(s):  
Claude Bertin Nzoundja Fapi ◽  
Patrice Wira ◽  
Martin Kamta ◽  
Hyacinthe Tchakounté ◽  
Bruno Colicchio
Keyword(s):  
Hardware Implementation ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Photovoltaic System

Comparative Study of Efficient Design, Control and Monitoring of Solar Power Using Internet of Things

2020 ◽  
Vol 18 (5) ◽  
pp. 419-426
Author(s):  
Parminder Kaur ◽  
Vikas Pandey ◽  
Balwinder Raj
Keyword(s):  
Internet Of Things ◽  
Solar Power ◽  
Short Circuit ◽  
Cost Effective ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Dust Particles ◽  
Efficient Design ◽  
Factors Affecting ◽  
Module Efficiency

The shortage of electricity is a major constraint to economic growth. Renewable energy such as solar energy has many advantages but also has many challenges to enhance its efficiency which is limited by the weather changes, dust particles, and material dependant properties. This affect various parameters like fill factor, short circuit current (jsc), open-circuit voltage (Voc) and module efficiency. This paper represents different materials used in solar cell structures and gives a realistic approach of factors affecting the performance of photovoltaic modules. The material used must produce cost-effective solar cells by reducing the amount of silicon material used in its production and enhance the power output. To enhance the performance of the PV cell, various methods and technologies are used. Effective use of solar power can be obtained using Internet of Things (IoT) technology which is used for solar tracking, monitoring, and forecasting.

An Investigation on Dye-Sensitized Solar Cell Performance Influenced by Radiant Intensity and Illuminated Area in Concentrating Photovoltaic System

2014 ◽  
Vol 1070-1072 ◽  
pp. 616-619
Author(s):  
Wen Bo Xiao ◽  
Jin Dai ◽  
Guo Hua Tu ◽  
Hua Ming Wu
Keyword(s):  
Solar Cell ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Photovoltaic System ◽  
Dye Sensitized Solar Cell ◽  
Solar Cell Performance ◽  
Radiant Intensity ◽  
Dye Sensitized

The dye-sensitized solar cell performances influenced by radiant intensity and illuminated area in concentrating photovoltaic system are investigated experimentally and discussed theoretically. The results show that, under the same irradiated cells area, the short-circuit current is linearly increasing with the radiant intensity and the open-circuit voltage follows a logarithmic function of the radiant intensity. And, it is turned out that the short-circuit current and open-circuit voltage are obviously enhanced by increasing the illuminated cells surface area at the same radiant intensity. However, that growth trends will decline with an increase of the illuminated area. The reason is more defects involved in the process of increasing illumination area. All results can be interpreted using an equivalent circuit of a single diode model. A good agreement can be observed from the fitting curves. It is of great significance for current photovoltaic research.

scholarly journals Thin-Film LSCs Based on PMMA Nanohybrid Coatings: Device Optimization and Outdoor Performance

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
S. M. El-Bashir ◽  
O. A. AlHarbi ◽  
M. S. AlSalhi
Keyword(s):  
Thin Film ◽  
Solar Energy ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Energy Conversion Efficiency ◽  
Pmma Substrate ◽  
Energy Potential ◽  
Optical Efficiency ◽  
Riyadh City ◽  
Luminescent Solar Concentrators

This study concerns the design optimization of thin-film luminescent solar concentrators (TLSCs) based on polymethylmethacrylate (PMMA)/silica nanohybrid films doped with coumarin dyestuffs specialized in coloring plastics. Two designs of TLSCs had been prepared and characterized. The first consists of a transparent nanohybrid layer coated on a fluorescent PMMA substrate. The second design is the ordinary configuration in which fluorescent nanohybrid layer is coated on a transparent PMMA substrate. The investigation of the spectral properties and efficiency parameters recommended the best solar energy conversion efficiency for the second design. The outdoor performance of optimized TLSC was also evaluated under clear sky conditions of Riyadh city, and the hourly values of the optical efficiency,ηopt, were calculated for one year. The best performance was achieved in summer since the short circuit current for PV cell was doubled after being attached to TLSC and the value ofηoptreached 40% which is higher than other values recorded before due to the abundant solar energy potential in the Arabian Peninsula.

scholarly journals Modelling and Efficiency Analysis of InGaP/GaAs Single Junction PV cells with BSF

2019 ◽  
Vol 8 (6) ◽  
pp. 623-627 ◽  
Keyword(s):  
Fill Factor ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Electrical Energy ◽  
Past Research ◽  
Open Circuit ◽  
Simulation Software ◽  
Optical Characteristics ◽  
Tcad Simulation ◽  
Silvaco Atlas

The purposes of PV cells are to transfer light energy into electrical energy. A compelling BSF is a key basic component for a productive PV cell.. In this paper, two significant materials GaAs and InGaP with top BSF and base BSF cells are researched utilizing the computational numerical modelling TCAD tool based Silvaco ATLAS. Past research observed that on the current coordinating condition with top BSF layer and base BSF layer, the cell show a general upgrade of density in Isc (short circuit current ) and Voc (open circuit voltage ) subsequently improving the overall efficiency of the cell. In this paper, structure of various thin film PV cells based on III-V materials e.g. GaN, InGaN have been used to design the multi junction PV cells. Extraction of figures of merits (efficiency, open circuit OC voltage, short circuit SC current and fill factor), simulation of electrical and optical characteristics of these devices have been carried out in this work. Our focus is to improve the optical characteristics, refractive index and absorption coefficient of InGaP with BSF and tunnelling features. In this paper complete Simulation and experimental results are shown and compared. The objective of this paper is to examine the productivity of InGaP/GaAs PV cells utilizing the Silvaco Atlas TCAD simulation software.

scholarly journals Studying the Effect of Light Incidence Angle on Photoelectric Parameters of Solar Cells by Simulation

2021 ◽  
Vol 10 (4) ◽  
pp. 731-736
Author(s):  
Jasurbek Gulomov ◽  
Rayimjon Aliev ◽  
Avazbek Mirzaalimov ◽  
Navruzbek Mirzaalimov ◽  
Jamshidbek Kakhkhorov ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Computer Aided Design ◽  
Incidence Angle ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Angular Coefficient ◽  
Light Spectrum ◽  
Frontal Surface ◽  
Light Incidence Angle

It is crucial to examine the dependence of photoelectric parameters of solar cells on the light incidence angle. In the present study, two solar cell models have been developed using the Sentaurus Technology Computer-Aided Design software package. The light spectrum AM1.5 has been directed on the frontal surface of solar cells at different angles. It has been found that the angular coefficient of the photoelectric parameters of a solar cell with nanoparticles included, is two times more than that of a simple solar cell. Besides, it has been found that the efficiency of platinum nanoparticles induced solar cells is 2.15 times greater than simple solar cell efficiency. When the light incidence angle has been varied from 0 to 60 degrees, the short-circuit current has changed by 11% for simple solar cells and by 10% for solar cells with nanoparticles. Further, it has been observed that the variation of power for simple solar cells is 12.5%, while it is 10.5% for solar cells with nanoparticles. In addition, the short-circuit current of solar cells with nanoparticles has been found to be linear within a light incidence angle ranging from 0 to 60 degrees.

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