The Experts below are selected from a list of 92991 Experts worldwide ranked by ideXlab platform
Raymond K. Kostuk - One of the best experts on this subject based on the ideXlab platform.
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Spectrum-splitting Photovoltaic System using bifacial cells for high energy yield
New Concepts in Solar and Thermal Radiation Conversion II, 2019Co-Authors: Benjamin D. Chrysler, Xuessen Tan, Jianbo Zhao, Raymond K. KostukAbstract:In this paper a spectrum-splitting Photovoltaic System is proposed that uses bifacial silicon solar cells to maximize total energy yield. The System is unique in its ability to convert direct sunlight with high-efficiency (
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spectrum splitting metrics and effect of filter characteristics on Photovoltaic System performance
Optics Express, 2014Co-Authors: Juan M Russo, Deming Zhang, Michael S Gordon, Shelby Vorndran, Raymond K. KostukAbstract:During the past few years there has been a significant interest in spectrum splitting Systems to increase the overall efficiency of Photovoltaic solar energy Systems. However, methods for comparing the performance of spectrum splitting Systems and the effects of optical spectral filter design on System performance are not well developed. This paper addresses these two areas. The System conversion efficiency is examined in detail and the role of optical spectral filters with respect to the efficiency is developed. A new metric termed the Improvement over Best Bandgap is defined which expresses the efficiency gain of the spectrum splitting System with respect to a similar System that contains the highest constituent single bandgap Photovoltaic cell. This parameter indicates the benefit of using the more complex spectrum splitting System with respect to a single bandgap Photovoltaic System. Metrics are also provided to assess the performance of experimental spectral filters in different spectrum splitting configurations. The paper concludes by using the methodology to evaluate spectrum splitting Systems with different filter configurations and indicates the overall efficiency improvement that is possible with ideal and experimental designs.
Minghui Tan - One of the best experts on this subject based on the ideXlab platform.
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performance optimization of dense array concentrator Photovoltaic System considering effects of circumsolar radiation and slope error
Optics Express, 2015Co-Authors: Cheewoon Wong, Kokkeong Chong, Minghui TanAbstract:This paper presents an approach to optimize the electrical performance of dense-array concentrator Photovoltaic System comprised of non-imaging dish concentrator by considering the circumsolar radiation and slope error effects. Based on the simulated flux distribution, a Systematic methodology to optimize the layout configuration of solar cells interconnection circuit in dense array concentrator Photovoltaic module has been proposed by minimizing the current mismatch caused by non-uniformity of concentrated sunlight. An optimized layout of interconnection solar cells circuit with minimum electrical power loss of 6.5% can be achieved by minimizing the effects of both circumsolar radiation and slope error.
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optical characterization of nonimaging dish concentrator for the application of dense array concentrator Photovoltaic System
Applied Optics, 2014Co-Authors: Minghui Tan, Kokkeong Chong, Cheewoon WongAbstract:Optimization of the design of a nonimaging dish concentrator (NIDC) for a dense-array concentrator Photovoltaic System is presented. A new algorithm has been developed to determine configuration of facet mirrors in a NIDC. Analytical formulas were derived to analyze the optical performance of a NIDC and then compared with a simulated result obtained from a numerical method. Comprehensive analysis of optical performance via analytical method has been carried out based on facet dimension and focal distance of the concentrator with a total reflective area of 120 m2. The result shows that a facet dimension of 49.8 cm, focal distance of 8 m, and solar concentration ratio of 411.8 suns is the most optimized design for the lowest cost-per-output power, which is US$1.93 per watt.
Cheewoon Wong - One of the best experts on this subject based on the ideXlab platform.
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performance optimization of dense array concentrator Photovoltaic System considering effects of circumsolar radiation and slope error
Optics Express, 2015Co-Authors: Cheewoon Wong, Kokkeong Chong, Minghui TanAbstract:This paper presents an approach to optimize the electrical performance of dense-array concentrator Photovoltaic System comprised of non-imaging dish concentrator by considering the circumsolar radiation and slope error effects. Based on the simulated flux distribution, a Systematic methodology to optimize the layout configuration of solar cells interconnection circuit in dense array concentrator Photovoltaic module has been proposed by minimizing the current mismatch caused by non-uniformity of concentrated sunlight. An optimized layout of interconnection solar cells circuit with minimum electrical power loss of 6.5% can be achieved by minimizing the effects of both circumsolar radiation and slope error.
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optical characterization of nonimaging dish concentrator for the application of dense array concentrator Photovoltaic System
Applied Optics, 2014Co-Authors: Minghui Tan, Kokkeong Chong, Cheewoon WongAbstract:Optimization of the design of a nonimaging dish concentrator (NIDC) for a dense-array concentrator Photovoltaic System is presented. A new algorithm has been developed to determine configuration of facet mirrors in a NIDC. Analytical formulas were derived to analyze the optical performance of a NIDC and then compared with a simulated result obtained from a numerical method. Comprehensive analysis of optical performance via analytical method has been carried out based on facet dimension and focal distance of the concentrator with a total reflective area of 120 m2. The result shows that a facet dimension of 49.8 cm, focal distance of 8 m, and solar concentration ratio of 411.8 suns is the most optimized design for the lowest cost-per-output power, which is US$1.93 per watt.
S N Singh - One of the best experts on this subject based on the ideXlab platform.
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selection of non isolated dc dc converters for solar Photovoltaic System
Renewable & Sustainable Energy Reviews, 2017Co-Authors: G Dileep, S N SinghAbstract:Abstract Concerns over environment and increased demand of energy have led the world to think about alternate energy sources such as wind, hydro, solar and fuel cells. Out of these, Photovoltaic (PV) power generation Systems have become increasingly important all over the world due its availability, cleanness, low maintenance cost and inexhaustible nature. But power produced by the Photovoltaic System is stochastic in nature due to the variation of solar irradiation and cell temperature throughout the day. In order to track the varying power, a DC-DC converter with maximum power point tracker (MPPT) is used. Different MPPT algorithms have been proposed for tracking peak power from the PV panel. Selection of adequate DC-DC converter is also an important factor since it has an influence on overall performance of the PV System. This paper presents a comparative study on the characteristics of different non-isolated DC-DC converters and highlights the various research works that has been done on DC-DC converters based MPPT PV System. Study shows that selection of converter also has an impact on the overall performance of the PV System. Based on the survey and comparative study, selection criteria to choose DC-DC converter for PV System is described in this paper.
S Umashankar - One of the best experts on this subject based on the ideXlab platform.
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integration of single phase reduced switch multilevel inverter topology for grid connected Photovoltaic System
Energy Procedia, 2017Co-Authors: N Prabaharan, Rini Ann A Jerin, K Palanisamy, S UmashankarAbstract:Abstract Renewable power generation becomes more popular nowadays due to the low availability of fuels. This paper proposes an integration of single DC source reduced switch multilevel inverter topology for grid connected Photovoltaic System to achieve a good quality output waveform. The proposed configuration requires less number of power semiconductor devices when compared to conventional multilevel inverter configurations for generating higher output voltage level with lower total harmonic distortion. A sine reference with phase disposition triangular carrier arrangement is utilized for generating the switching pulses to the proposed multilevel inverter. A single diode model in Photovoltaic System and dual output boost converter is utilized in the proposed System to reduce the complexity. Also, the improved incremental and conductance maximum power point tracking is selected in this work. The proposed System is tested only in standard test condition using MATLAB/Simulink. Hence, the proposed System is well suitable for grid connected in Photovoltaic System.
