Measurement of dust sweeping force for cleaning solar panels

Abstract A new methodology has been developed to evaluate cleaning efficiency of dust particles on solar panels. Those particles have an average diameter of 2.3 µm and were collected in Doha, Qatar. A brush-disk configuration was constructed to measure the sweeping force as a polymeric tip sliding through a dusted glass substrate. The sweeping force was measured under various applied loads on samples treated in environment of various humidity. Experimental results showed that the cleaning efficiency of dry dust particles was independent of the applied load, reaching higher than 90%. However, the adsorption of water molecules showed pronounced effects on the cleaning efficiency. In order to increase the efficiency in humid environment, the applied load thus needed to be increased. The higher the applied load, the higher the sweeping force, the higher the cleaning efficiency, indicating more power is needed to clean the surface. This research presented an alternative approach to evaluate the cleaning efficiency of dust particles.

[1]  S. Matsusaka,et al.  Microscopic analysis of saltation of particles on an obliquely oscillating plate , 2014 .

[2]  H. Yan,et al.  TEOS/silane coupling agent composed double layers structure: A novel super-hydrophilic coating with controllable water contact angle value ☆ , 2017 .

[3]  Mohd Amran Mohd Radzi,et al.  Power loss due to soiling on solar panel: A review , 2016 .

[4]  Liu Wenjie,et al.  Preparation of transparent fluorocarbon/TiO 2 -SiO 2 composite coating with improved self-cleaning performance and anti-aging property , 2017 .

[5]  Michael Stintz,et al.  Analysis of Adhesion Forces Between Particles and Wall Based on the Vibration Method , 2002 .

[6]  H. Frijlink,et al.  A centrifuge method to measure particle cohesion forces to substrate surfaces: the use of a force distribution concept for data interpretation. , 2010, International journal of pharmaceutics.

[7]  Syed A.M. Said,et al.  Fundamental studies on dust fouling effects on PV module performance , 2014 .

[8]  H. Butt,et al.  The Colloidal Probe Technique and Its Application to Adhesion Force Measurements , 2002 .

[9]  S. Trigwell,et al.  Dust Particle Removal by Electrostatic and Dielectrophoretic Forces with Applications to NASA Exploration Missions , 2008 .

[10]  Hasimah Abdul Rahman,et al.  Performance degradation of photovoltaic power system: Review on mitigation methods , 2017 .

[11]  B. Zhang,et al.  Why a lotus-like superhydrophobic surface is self-cleaning? An explanation from surface force measurements and analysis. , 2014, Langmuir : the ACS journal of surfaces and colloids.

[12]  Mônica Lopes Aguiar,et al.  Determining the adhesion force between particles and rough surfaces , 2015 .

[13]  Li-Zhi Zhang,et al.  Experimental investigation of the anti-dust effect of transparent hydrophobic coatings applied for solar cell covering glass , 2017 .

[14]  B. Hu,et al.  Measurements and Factorial Analysis of Micron-Sized Particle Adhesion Force to Indoor Flooring Materials by Electrostatic Detachment Method , 2008 .

[15]  Lawrence L. Kazmerski,et al.  Dust and soiling issues and impacts relating to solar energy systems: Literature review update for 2012-2015 , 2016 .

[16]  Boon Siong Wee,et al.  Adhesion of Dust Particles to Common Indoor Surfaces in an Air-Conditioned Environment , 2014 .

[17]  Lawrence L. Kazmerski,et al.  A comprehensive review of the impact of dust on the use of solar energy: History, investigations, results, literature, and mitigation approaches , 2013 .

[18]  B. Yilbas,et al.  Influence of dust and mud on the optical, chemical, and mechanical properties of a pv protective glass , 2015, Scientific Reports.

[19]  A. Hassanpour,et al.  Drop test: A new method to measure the particle adhesion force , 2014 .

[20]  Rohit Pillai,et al.  Impact of dust on solar photovoltaic (PV) performance: Research status, challenges and recommendations , 2010 .

[21]  Hiroyuki Kawamoto,et al.  Electrostatic cleaning system for removal of sand from solar panels , 2015 .

[22]  J. Drelich,et al.  Atomic Force Microscope Pull-off Force Measurements for Insulin in Contact with Acrylonitrile–Butadiene–Styrene and Polypropylene Surfaces at Various Humidities , 2011 .

[23]  Benjamin Figgis,et al.  Characterization of dust accumulated on photovoltaic panels in Doha, Qatar , 2017 .

[24]  H. Butt,et al.  Measuring adhesion forces in powder collectives by inertial detachment. , 2013, Langmuir : the ACS journal of surfaces and colloids.

[25]  M. Wan,et al.  Modeling and experiments of the adhesion force distribution between particles and a surface. , 2014, Langmuir : the ACS journal of surfaces and colloids.

[26]  Jm Newton,et al.  Influence of particle size on the adhesion behaviour of powders, after application of an initial press-on force , 1992 .

[27]  Malay K. Mazumder,et al.  Self-Cleaning Solar Mirrors Using Electrodynamic Dust Shield: Prospects and Progress , 2014 .