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Proceedings Paper

Measuring and simulation of water vapour permeation into PV modules under different climatic conditions
Author(s): P. Hülsmann; M. Jäger; K.-A. Weiss; M. Köhl
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Paper Abstract

This paper is dealing with measuring the water ingress to PV-modules under different climatic conditions and simulating it over an expected lifetime of 20 years. Furthermore different kinds of back sheet / encapsulant combinations were considered. For this purpose an own developed high sensitive test device composed of a climate cabinet and a mass spectrometer was used to investigate the temperature dependent permeation and diffusion processes that takes place in the polymers. Furthermore the results - permeation and diffusion coefficient - were used to simulate the mass transport through the back sheet and inside the encapsulant materials. In a second part the amount of absorbed water was analysed by a gravimetric method. For this study encapsulant materials were exposed to different ambient climates to quantify the sorption isotherme. With these results - permeation / diffusion coefficient and absorbed water amount - the mass transport and water concentration were simulated over the lifetime of a PV-module under different climatic conditions. Additional the influence of various tight back sheets on water ingress will be shown.

Paper Details

Date Published: 19 August 2010
PDF: 6 pages
Proc. SPIE 7773, Reliability of Photovoltaic Cells, Modules, Components, and Systems III, 777307 (19 August 2010); doi: 10.1117/12.860598
Show Author Affiliations
P. Hülsmann, Fraunhofer Institute for Solar Energy Systems (Germany)
M. Jäger, Fraunhofer Institute for Solar Energy Systems (Germany)
K.-A. Weiss, Fraunhofer Institute for Solar Energy Systems (Germany)
M. Köhl, Fraunhofer Institute for Solar Energy Systems (Germany)


Published in SPIE Proceedings Vol. 7773:
Reliability of Photovoltaic Cells, Modules, Components, and Systems III
Neelkanth G. Dhere; John H. Wohlgemuth; Kevin Lynn, Editor(s)

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