Journal
SOLAR ENERGY
Volume 162, Issue -, Pages 597-619Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.solener.2017.12.023
Keywords
Dust density; Efficiency; Photovoltaic panels; Self cleaning methods; Solar cells
Categories
Funding
- UM Power Energy Dedicated Advanced Centre (UMPEDAC)
- Higher Institution Centre of Excellence (HICoE) Program Research Grant, UMPEDAC - (MOHE HICOE - UMPEDAC)
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Photovoltaic (PV) installations in desert areas such as Middle East, Africa, four-season countries and industrial areas suffers from loss in efficiency due to accumulation of dust, snowfall and airborne dirt (both organic and inorganic) from factories. The resultant soiling through dirt accumulation hinders the conversion of light into electricity, consequently degrading the PV performance. Hence, in order to maintain a steady performance, PV panels must be cleaned regularly. However, traditional manual cleaning of the panels is an energy and time consuming process. Moreover, manual cleaning can also create cracks on the PV panel surface due to harsh brushing which will further deteriorate PV performance. In addition, very small particles cannot be removed effectively by manual cleaning process. Therefore, researchers around the globe are promoting the self-cleaning methods, viz., electrostatic method, mechanical method and coating method for PV panel surface cleaning. In this article, attempt has been made to review the progress and achievements in all kinds of self-cleaning methods for PV panels with special focus on super hydrophobic coating based methods for self-cleaning. In this connection, future focus research areas such as development of mini robots and spray coating on self-cleaning have been pointed out.
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