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DOE OSTI · 1770903

Computational Modeling of Photovoltaic Mini-Modules Undergoing Accelerated Stress Testing

Meert, Joseph J.·Owen-Bellini, Michael·Hacke, Peter·Hartley, James Y.
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Abstract

A finite element model of a four-cell photovoltaic mini-module was developed and compared to experimental results from an accelerated stress test protocol in order to validate that computational models can accurately represent their physical counterparts when subjected to mechanical loading and to assess mini-module representativeness against full scale photovoltaic modules. Deflected shapes across the simulated mini-modules were compared to measured mini-module shapes when subjected to various pressure loads. Displaced mini-module shape results constrained to the experimental protocols of 0.4 mm and 1.1 mm of displacement at the mini-module center were compared to experimental results of full-size modules subjected to module qualification test load levels of 1.0 kPa and 2.4 kPa, to assess if the bending of mini-modules was representative of full-sized modules under the load. Temperature cycling was incorporated into the model to simulate the impacts of stress due to thermal expansion of the backsheet and cells. A preliminary uncertainty analysis was performed to show how variations in material properties and geometric parameters change the simulation results.

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computational modelingfinite element methodphotovoltaicsSOLAR ENERGYsolid mechanicsuncertainty quantification

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Meert, Joseph J., Owen-Bellini, Michael, Hacke, Peter, Hartley, James Y.. 2021-01-05. Computational Modeling of Photovoltaic Mini-Modules Undergoing Accelerated Stress Testing. https://doi.org/10.1109/pvsc45281.2020.9300510

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