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Water Diffusion Simulation of the Photovoltaic Laminate Based on Gravimetric Measurement of Packaging Materials
A. Dadaniya, N.V. Datla
Backsheet, PV Module, Water Absorption, Gravimetric, Primer Layer
Photovoltaic Modules and BoS Components
Subtopic: PV Module Design, Manufacture, Performance and Reliability
Event: 35th European Photovoltaic Solar Energy Conference and Exhibition
Session: 5CV.1.44
1256 - 1259
ISBN: 3-936338-50-7
Paper DOI: 10.4229/35thEUPVSEC20182018-5CV.1.44
0,00 EUR
Document(s): paper


Photovoltaic modules (PV) are expected to be durable against exposure to outdoor environments for prolonged time durations. The dynamic outdoor environment is in direct contact with the polymeric back sheet of the module that leads to frequent moisture absorption and desorption within the module. Considering these varying environmental conditions as well as the multilayer nature of the packaging materials, it is challenging to predict the water concentration accurately and thereby mechanical durability of the module (back sheet and encapsulation). Therefore, there is a need for systematic multilayer experimental and computational approach for water diffusion prediction at each layer of the PV module laminate. The composite back sheet is modeled as both single and two-layered material for characterizing the water diffusion using permeation and gravimetric techniques. The encapsulation material is characterized using the gravimetric technique. The gravimetric test was performed for water uptake of PV module laminate and compared the results with the simulated water mass uptake. Water concentration within PV laminate (primer layer) was simulated under the exposure to outdoor environment condition for single and two-layer back sheet.