Environmental Factors for Non-uniform Dynamic Mechanical Load Test due to Wind Actions on Photovoltaic Modules

Hsu, Shu-Tsung; Lin, Wei-You; Wu, Sheng-Tsai

doi:10.1016/j.egypro.2018.09.008

Cited by 7 publications

(5 citation statements)

References 2 publications

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“…A sequential mechanical loading test was conducted on a commercially available PV module(1970 × 993 × 35 mm) assembled with 72 mono-c-Si PV cells (156 × 156 mm 2 , four busbars) to form cell cracks reflecting non-uniform wind loads during a strong typhoon, as described in our previous report [ 37 ]. The I–V parameters—maximum power ( P max ), I sc , open-circuit voltage ( V oc ), and FF—in the PV module before this sequential mechanical loading test were assessed as 359.8 W, 9.88 A, 45.6 V, and 76.5%, respectively.…”

Section: Methodsmentioning

confidence: 99%

Solar cell cracks within a photovoltaic module: Characterization by AC impedance spectroscopy

Tanahashi

Hsu²

2022

PLoS ONE

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Various cell crack modes (with or without electrically inactive cell areas) can be induced in crystalline silicon photovoltaic (PV) cells within a PV module through natural thermomechanical stressors such as strong winds, heavy snow, and large hailstones. Although degradation in the performance of PV modules by cell cracks has been reported occasionally, the mode-dependent evolutions in the electrical signatures of cracks have not yet been elucidated. In this study, we propose that the reduction of the time constant in the AC impedance spectra, which is caused by the elevation of minority-carrier recombination in the p–n junction of a PV cell, is a ubiquitous signature of cracked PV cells encapsulated in a commercially available PV module. Several other characteristics derived from the illuminated current-voltage (I–V) and dark I–V data significantly evolved only in PV cells with inactive cell areas. We also propose that the evaluation by carrier recombination is a crucial diagnostic technique for detecting all crack modes, including microcracks, in wafer-based PV modules.

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Section: Methodsmentioning

confidence: 99%

Solar cell cracks within a photovoltaic module: Characterization by AC impedance spectroscopy

Tanahashi

Hsu²

2022

PLoS ONE

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“…Table shows the characteristics of the PV module 1 after the test at 1129 N. In Table 1, the characteristics of PV modules were obtained using I-V (Voltage Amps) measuring equipment: Pasan Highlight 3, class AAA+, measuring time 10 ± 1 ms. Measured under standard conditions: 1000 ± 30 W/m 2 , solar spectrum AM 1.5 g, 25 • C [57][58][59][60]. The analysis of the results received (Table 1) revealed that micro-cracks mainly formed at the point of contact between the solar cell and the ball simulating an ice cube, and some micro-cracks appeared at the fastening points on the edges of the PV module.…”

Section: Research Of the Resistance Of Photovoltaic Modulesmentioning

confidence: 99%

Research on Solar Collector

2020

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In the last decade, large-scale deployment in the commercial use of tracking solar collectors has occurred due to new and large solar power plants using parabolic troughs or solar tower plants.This has piqued the interest of the research community and industry in new optical designs of solar collectors and in investigating the performance, limitations, and operational and maintenance issues of current solar collector designs, including specific research on receivers, optical concentrators, tracking systems, etc. This Special Issue presents some recent research on solar collectors for medium-temperature applications, both line-focus and point-focus, conceived for industrial process heat or combined thermal and electrical applications (e.g., concentrated photovoltaic systems), and high temperature applications, independently if the final application is the coupling of the solar system to provide thermal energy to a power block for electricity production or the supply of that high temperature thermal energy to heat processes in industries. This Special Issue presents both theoretical and practical issues on geometrics optics, thermal-hydraulic modelling, and performance analysis, and it includes articles focused in solar tower systems, both on the concentrator optics and receiver behavior, parabolic troughs, linear-and point-focus Fresnel collectors, Fresnel lens, and concentrated photovoltaic systems.

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Section: Research Of the Resistance Of Photovoltaic Modulesmentioning

confidence: 99%

“…Table 1 shows the characteristics of the PV module 1 after the test at 1129 N. In Table 1, the characteristics of PV modules were obtained using I-V (Voltage Amps) measuring equipment: Pasan Highlight 3, class AAA+, measuring time 10 ± 1 ms. Measured under standard conditions: 1000 ± 30 W/m 2 , solar spectrum AM 1.5 g, 25 °C [57][58][59][60]. The analysis of the results received (Table 1) revealed that micro-cracks mainly formed at the point of contact between the solar cell and the ball simulating an ice cube, and some micro-cracks appeared at the fastening points on the edges of the PV module.…”

Section: Research Of the Resistance Of Photovoltaic Modulesmentioning

confidence: 99%

Research of the Energy Losses of Photovoltaic (PV) Modules after Hail Simulation Using a Newly-Created Testbed

et al. 2019

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The impact of hail ice cubes on composite structures (such as solar cells) causes actual defects. This article presents a series of tests, in which solar cell modules were exposed to hail simulation testbed balls, allowing to assess the following: the impact energy, which causes the major defects in solar cells; the formed micro-cracks in the structure of solar cells, resulting in the loss of power generated by a solar cell; and the solar cell parameters necessary for modelling. In addition, this article presents a digital analysis of hail simulation. Information received from the digital analysis was used to optimize the structure of solar cells in order to improve its resistance properties. The aim of this study was to present a simple method for experimental hail simulation. The proposed hail impact estimation method can be successfully applied to study the influence of the mechanical–dynamic impact of photovoltaic (PV) modules of different structures on the technical characteristics of these modules (structural stability, power generation, etc.). The study showed that PV modules are subjected to an irreversible effect of the excitation force (i.e., micro-cracking) and it can reduce the generated power by 2.33% to 4.83%.

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Environmental Factors for Non-uniform Dynamic Mechanical Load Test due to Wind Actions on Photovoltaic Modules

Cited by 7 publications

References 2 publications

Solar cell cracks within a photovoltaic module: Characterization by AC impedance spectroscopy

Solar cell cracks within a photovoltaic module: Characterization by AC impedance spectroscopy

Research on Solar Collector

Research of the Energy Losses of Photovoltaic (PV) Modules after Hail Simulation Using a Newly-Created Testbed

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