EU PVSEC Programme Online
EU PVSEC 2021, 6 - 10 September 2021
Presentation: 4AV.2.32 Enabling Measurement of PV Module Curvature: Towards Characterization of Thermomechanical Residual Stresses
Type: Visual
Date: Monday, 6th September 2021
17:00 - 18:30
Author(s): I. Rahmoun, T. Le Carre, B. Chambion, E. Mofakhami, A. Derrier, J.-L. Bouvard, P.-O. Bouchard
Presenter / Speaker: I. Rahmoun, CEA, Le Bourget-du-Lac, France
Event: Conference Conference
Session: 4AV.2 PV Module Characterisation, Testing and Outdoor Performance
Topic: 4. 1 PV Module Design, Manufacture, Performance and Reliability
Keywords: Curvature Measurement, Thermomechanical Stress, PV Module Architecture, Manufacturing, FEM
Summary / Abstract: Assessment of the effect of the lamination process parameters on the reliability of PV modules is a key step to extend their lifetime. In this work, a new method of measurement of the deflection PV modules is presented. This method consists in mapping the surface of both sides of a PV module positioned on 4-point supports. The measurement repetition on both sides aims at compensating for the gravity effect induced by the self-weight of the PV module. The position of the supports is analytically optimized. The error induced by this protocol of measurement is numerically estimated. An experimental measurement campaign is carried out to characterize the impact of lamination process parameters on the residual deflection of the PV modules. First, twelve glass plates are tested. The results showed that their initial shape is not flat with asymmetric deflection. Then, the PV modules are manufactured using the same glass plates while varying architecture, lamination temperature, and cooling type. For glass-backsheet architecture, the deflection decreases when the lamination temperature increases, which is not observed in glass-glass architecture. The type of cooling has also an effect, as the deflection of ambient air-cooled PV modules is higher than that of cooling press-cooled PV modules.