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Simulation of Water Vapor Ingress into PV-Modules under different Climatic Conditions

: Hülsmann, P.

Volltext urn:nbn:de:0011-n-2705046 (4.0 MByte PDF)
MD5 Fingerprint: 3f528384d912c73e0764724dd295688a
Erstellt am: 11.12.2013

Journal of Materials. Online journal 2013 (2013), Article 102691, 7 S.
ISSN: 2314-4874
ISSN: 2314-4866
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer ISE ()
Photovoltaische Module; Systeme und Zuverlässigkeit; Photovoltaische Module und Kraftwerke; Photovoltaische Module - Systeme und Zuverlässigkeit; Gebrauchsdauer von Modulen und Materialien; Gebrauchsdaueranalyse und Umweltsimulation

This work deals with the simulation of water vapor ingress into wafer-based PV-modules for long-term exposure under different climatic conditions. Measured material parameters together with climatic data sets from four test sites (tropic, moderate, alpine, and arid) were used to calculate the water concentration inside of the encapsulant between solar cell and glass for a lifetime of 20 years. Two back-sheet materials (PET-based and PA-based) combined with EVA as encapsulant were used in respect to their influence on water ingress. The results show faster water ingress for warmer regions, but the highest concentrations were found for the moderate test site. The water ingress was additionally influenced by the used encapsulant and back-sheet combination. In particular the temperature dependency of the mass transfer, which differs from material to material, was the focus of this investigation.