Periodic cleaning effect on the output power of solar panels

	Periodic cleaning effect on the output power of solar panels
journal of kerbala university
Article 1, Volume 7, Issue 4, 2011, Pages 116-122 PDF (0 K)
Abstract
Deposition of airborne dust on outdoor photovoltaic (PV) modules may decrease the transmittance of solar cell glazing and cause a significant degradation of generated power from solar panel by certain percentage, according to the impact of the amount of dust and the factors associated with it and which form a strong relationship are interrelated with each one (the proportion of the accumulation of dust , inclination angles, exposure time, the climatic conditions of the site, wind speed, and dustproperties). In this practical field study, an experimental-based investigation is conducted in order to compare the energy performance of four identical PV-panels with 20 watt power; one cleaned daily, one cleaned weekly, one cleaned monthlyand one subjected to the influence of the accumulation of dust, by using Solmetric PV Analyzer for a period of time (30/10/2012 to 30/04/2013). and then calculating relative conversion efficiency (E) to three panels. According to the practical results obtained appeared that there is a significant decrease in the relative conversion efficiency which was ( 7.9%, 20%, 27%) for the weekly cleaned, monthly cleaned andseasonally cleaned panels respectively relative to daily cleaned panel and the reduction in average performance factor was ( 5.7 , 12.6 ,17.2 ) for weekly cleaned, monthly cleaned and seasonally cleaned panels respectively.
Keywords
Dust deposition effect; PV performance; Air pollution; solar panel

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