Paggi, M.; Kajari-Schröder, S.; Eitner, U.: Thermomechanical deformations in photovoltaic laminates. In: Journal of Strain Analysis for Engineering Design 46 (2011), Nr. 8, S. 772-782. DOI:
https://doi.org/10.1177/0309324711421722
Abstract: |
Recent experimental results based on the digital image correlation technique (U. Eitner, M. Köntges, R. Brendel, Solar Energy Mater. Solar Cells, 2010, 94, 1346-1351) show that the gap between solar cells embedded into a standard photovoltaic laminate varies with temperature. The variation of this gap is an important quantity to assess the integrity of the electric connection between solar cells when exposed to service conditions. In this paper, the thermo-elastic deformations in photovoltaic laminates are analytically investigated by developing different approximate models based on the multilayered beam theory. It is found that the temperature-dependent thermo-elastic properties of the encapsulating polymer layer are responsible for the deviation from linearity experimentally observed in the diagram relating the gap variation to the temperature. The contribution of the different material constituents to the homogenized elastic modulus and thermal expansion coefficient of the composite system is also properly quantified through the definition of weight factors of practical engineering use. Copyright © 2011 by Institution of Mechanical Engineers.
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License of this version: |
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Publication type: |
Article |
Publishing status: |
publishedVersion |
Publication date: |
2011 |
Keywords english: |
Analytical model, Digital image correlation, Multilayered system, Photovoltaic laminate, Thermo-elastic deformations, Analytical model, Approximate model, Digital image correlation technique, Digital image correlations, Electric connections, Multi-layered systems, Multilayered beams, Photovoltaic laminate, Polymer layers, Practical engineering, Service conditions, Temperature dependent, Thermal expansion coefficients, Thermomechanical deformations, Weight factor, Elastic deformation, Electric connectors, Image analysis, Mathematical models, Nanostructured materials, Paper laminates, Photovoltaic effects, Solar energy, Strain measurement, Thermal expansion, Thermoelasticity, Solar power generation
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DDC: |
620 | Ingenieurwissenschaften und Maschinenbau
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