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Interest in renewable energy has motivated the implementation of new polymeric materials in photovoltaic modules. Some of these are non-cross-linked thermoplastics, in which there is a potential for new behaviors to occur, including phase transformation and visco-elastic flow. Differential scanning calorimetry and rheometry data were obtained and then combined with existing site-specific time-temperature information in a theoretical analysis to estimate the displacement expected to occur during module service life. The analysis identified that, depending on the installation location, module configuration and/or mounting configuration, some of the thermoplastics are expected to undergo unacceptable physical displacement. While the examples here focus on encapsulation materials, the concerns apply equally to the frame, junction-box, and mounting-adhesive technologies.
Deformations (Mechanics); Photovoltaic cells – Materials; Solar energy; Thermoplastics – Creep
Oil, Gas, and Energy | Polymer and Organic Materials
Miller, D. C.,
Kempe, M. D.,
Glick, S. H.,
Kurtz, S. R.
Creep in photovoltaic modules: Examining the stability of polymeric materials and components.
Available at: http://digitalscholarship.unlv.edu/renew_pubs/37