scholarly journals Stress Analysis of Silicon Wafer-Based Photovoltaic Modules Under IEC 61215 Mechanical Load Test

2013 ◽  
Vol 33 ◽  
pp. 265-271 ◽  
Author(s):  
Yixian Lee ◽  
Andrew A.O. Tay
Keyword(s):  
Stress Analysis ◽  
Silicon Wafer ◽  
Mechanical Load ◽  
Load Test ◽  
Photovoltaic Modules ◽  
Iec 61215

scholarly journals Effect of Wind Load on Performance of Photovoltaic (PV) Modules Available in Pakistan

2021 ◽  
Vol 40 (4) ◽  
pp. 860-866
Author(s):  
Rizwan Mehmood Gul ◽  
Fahad Ullah Zafar ◽  
Muhammad Ali Kamran ◽  
Muhammad Noman
Keyword(s):  
Power Output ◽  
Mechanical Load ◽  
Wind Load ◽  
International Standards ◽  
Load Test ◽  
Mechanical Integrity ◽  
Pv Module ◽  
Pv Modules ◽  
Iec 61215 ◽  
The Impact

Mechanical integrity of a Photovoltaic (PV) module plays a major role in its performance and electrical output. Mechanical loads which include loads produced by wind, snow, rain, and hail tend to degrade the performance of PV module by generating stresses and enhancing micro-cracks and defects. This research aims to investigate the impact of wind loads on the performance of PV modules, particularly the degradation in its power output. A load of 2400 Pa was applied as per international standards (ASTM E1830-15 and IEC-61215). A total of four PV module samples, of the same specifications with 60 W rated power, were initially subjected to solar flash testing and Electroluminescence (EL) imaging. This was followed by three cycles of mechanical load test. After the mechanical load tests, the modules were again subjected to solar flash testing and EL imaging and the results were compared. It was noted that static wind load degrades the mechanical integrity of photovoltaic modules in two ways; by aiding the propagation of existing cracks and initiating new cracks. This loss of mechanical integrity degraded the power output of PV module. Maximum drop of 2% in the power output and 0.27% in the efficiency was observed. In addition, the average increase of 3.37% in the series resistance was observed indicating decrease in performance.

Development of a Thermal Model for Photovoltaic Modules and Analysis of NOCT Guidelines

2011 ◽  
Vol 134 (1) ◽  
Author(s):  
Ty W. Neises ◽  
Sanford A. Klein ◽  
Douglas T. Reindl
Keyword(s):  
Thermal Model ◽  
Photovoltaic Module ◽  
Cell Temperature ◽  
Flow Models ◽  
Photovoltaic Modules ◽  
Wind Speeds ◽  
Low Wind Speeds ◽  
Iec 61215 ◽  
Testing Standards ◽  
Operating Cell

The temperature of a photovoltaic module is typically required as an input to models that predict the module’s performance. Some common models use the nominal operating cell temperature (NOCT), as by the manufacturer. This paper develops a thermal model and uses it to analyze NOCT testing standards. Specifically, the standard correction factor charts found in the ASTM E1036 and IEC 61215 standards are evaluated. Results show that the correction charts were likely created assuming laminar flow correlations, while validation efforts and the fact that wind is often characterized by turbulence even at low wind speeds suggest that turbulent flow models may be more appropriate. In addition, the results presented in this paper show that the standard NOCT charts do not account for the backside insulation of photovoltaic (PV) arrays. These results suggest that the standard correction charts are inaccurate for any mounting types that differ from the open rack configuration. The paper concludes with recommendations to improve the usefulness of the NOCT.

scholarly journals Compositionally Graded Hydrophobic UV-Cured Coatings for the Prevention of Glass Stress Corrosion

Coatings ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 424 ◽  
Author(s):  
Sara Dalle Vacche ◽  
Gregorio Mariggiò ◽  
Alessandra Vitale ◽  
Roberta Bongiovanni ◽  
Mauro Corrado
Keyword(s):  
Tensile Strength ◽  
Stress Corrosion ◽  
Mechanical Load ◽  
Load Test ◽  
Good Adhesion ◽  
Compositional Profile ◽  
Double Ring ◽  
Structural Applications ◽  
Graded Coating ◽  
Set Up

The use of glass in architecture is growing and is moving towards structural applications. However, the tensile strength of glass cannot be fully exploited because of stress corrosion. This is a corrosion triggered by stress applied to the material and dependent on environmental factors such as humidity and temperature. To protect glass from stress corrosion, we developed a UV-cured coating, characterized by hydrophobicity, barrier to water vapor properties, and good adhesion to glass, thanks to a compositional profile. The coating was obtained by combining a cycloaliphatic diacrylate resin with a very low amount of a perfluoropolyether methacrylate co-monomer, which migrated to the free surface, creating a compositionally graded coating. The adhesion to glass was improved, using as a primer an acrylated silane able to co-react with the resins. With a mechanical load test using the coaxial double ring set-up, we proved that the coating is effective in the inhibition of stress corrosion of glass plates, with an increase of 76% of tensile strength.

An Introduction to Dynamic Load Test on Photovoltaic Modules

2017 ◽  
Vol 726 ◽  
pp. 13-17 ◽  
Author(s):  
Dong Wang ◽  
Chen Guang Wei
Keyword(s):  
Dynamic Loading ◽  
Dynamic Load ◽  
Load Test ◽  
Solar Photovoltaic ◽  
Front Cover ◽  
Photovoltaic Modules ◽  
Dynamic Load Test ◽  
Capacity Reduction ◽  
Pv Modules ◽  
Different Types

The front cover of solar photovoltaic modules is mostly made of 3.2mm, 2mm or thinner glass. When under wind or other dynamic loading stress, the performance of the PV modules might be affected. This article analyzed data of dynamic load test on several different types of PV modules, and got the conclusion that the dynamic load stress could harm the string ribbon or interior circuits of the PV modules, and would therefore lead to capacity reduction and less insulation.

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