Degradation Prevalence Study of Field-Aged Photovoltaic Modules Operating Under Kenyan Climatic Conditions
Science Journal of Energy Engineering
Volume 3, Issue 1, February 2015, Pages: 1-5
Received: Jan. 27, 2015; Accepted: Feb. 6, 2015; Published: Feb. 11, 2015
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Authors
Macben Makenzi, Mechatronic Department, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya
Nelson Timonah, Physics Department, Jomo Kenyatta University of Agriculture and technology, Nairobi, Kenya
Mutua Benedict, Faculty of Engineering and Technology, Egerton University, Nakuru, Kenya
Ismael Abisai, Ubbink East Africa Ltd, Naivasha, Kenya
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Abstract
Photovoltaic (PV) modules deployed outdoors can degrade due to exposure to the various elements. This includes exposure to UV light, a range of fluctuating temperatures and humidity and exposure to a range of operating currents and voltages. Different weather conditions have an important influence on degradation rate. Evidence indicates that both degradation and failure mechanisms are location dependent. This paper presents a research investigating the prevalence of various forms of physical degradation experienced by photovoltaic panels which have been in operation in Kenya under various climatic conditions. To study degradation of PV systems, identification and analysis of modules that had been deployed in various locations in Kenya, and which had been in operation for at least the last 2 years was carried out. Imaging instruments were used to study visible signs of weathering and other physical defects. The results indicated that despite the fact that panels are designed to operate in outdoor environment, numerous cases do exist whereby the panels degrade physically, in various ways, and consequently exhibit total failure, diminished performance or just physical manifestation of wear. Apart from manufacturer defects, user ignorance on installation and usage was also proved to contribute to the diminished life span of some panels.
Keywords
Degradation, Photovoltaic, Field-Aged Modules
To cite this article
Macben Makenzi, Nelson Timonah, Mutua Benedict, Ismael Abisai, Degradation Prevalence Study of Field-Aged Photovoltaic Modules Operating Under Kenyan Climatic Conditions, Science Journal of Energy Engineering. Vol. 3, No. 1, 2015, pp. 1-5. doi: 10.11648/j.sjee.20150301.11
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