Direct measurement of moisture ingress in PV laminates
Nikoleta Kyranaki
David Whalley
David Hutt
Ralph Gottschalg
Tom Betts
2134/10252997.v1
https://repository.lboro.ac.uk/articles/conference_contribution/Direct_measurement_of_moisture_ingress_in_PV_laminates/10252997
This work demonstrates a novel method for the measurement of moisture ingress into PV laminates, by
the use of humidity indicator cards encapsulated within the structure. The humidity indicator cards change colour due
to moisture exposure, which is quantified by processing images of the samples taken with a camera. To allow the
variance of colour to be matched to specific levels of humidity, a detailed calibration was first performed. To achieve
this, laminates with the structure [EVA-humidity indicator card-EVA-glass] were stabilised in an environmental
chamber at 85ÂșC at increasing levels of relative humidity. The colour change of the humidity indicator cards
corresponding to the relative humidity inside the chamber was then plotted on RGB colour space diagrams. The purpose
of this work is the development of a measurement method for the moisture that accumulates at the front side of PV
cells, for the experimental verification of simulations of the moisture ingress into PV modules and the better
understanding of degradation modes related to corrosion.
2019-11-05 14:11:40
reliability
polymer film
spectroscopy
moisture ingress