Degradation effects in sc-Si PV modules subjected to natural and induced ageing after several years of field operation

Kaplani, E. (2012) Degradation effects in sc-Si PV modules subjected to natural and induced ageing after several years of field operation. Journal of Engineering Science and Technology Review, 5 (4). pp. 18-23. ISSN 1791-9320

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    Abstract

    This paper presents ageing effects observed in sc-Si PV modules operating in field conditions for 18 and over 22 years. The effects of both natural ageing processes and induced ageing by external agents, causing partial or total shading of cells for a prolonged period of time, are examined. Optical degradation effects observed through visual inspection include discoloration of the EVA, degradation of the AR coating, degradation of the interface between the cell and encapsulant, corrosion of busbars and fingers, and tears, bubbles and humidity ingress at the back surface of the modules. Thermal degradation effects examined via IR thermography reveal the existence of hot cells, hotspots on the busbars, and colder bubbles. Modules' power and performance degradation is assessed through I-V curve analysis. Results show naturally aged modules to exhibit milder ageing effects than modules subjected to induced ageing, an outcome also supported by their power degradation ratio.

    Item Type: Article
    Uncontrolled Keywords: i-v curve analysis,ir thermography,natural and induced ageing
    Faculty \ School: Faculty of Science > School of Mathematics
    Related URLs:
    Depositing User: Pure Connector
    Date Deposited: 16 Nov 2015 09:00
    Last Modified: 26 Jul 2018 10:05
    URI: https://ueaeprints.uea.ac.uk/id/eprint/55295
    DOI:

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