Artificial dust deposition chamber for investigation of soiling loss on photovoltaic modules.
Lloyd Fernandes1, Sonali Bhaduri1,2, Ajeesh Alath1, Narendra Shiradkar1,3, Anil Kottantharayil1,3
1National Centre for Photovoltaic Research and Education, Mumbai, India
/2Centre for Research in Nanotechnology and Science, Mumbai, India
/3Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, India

Natural dust deposition is a long process requiring several days to obtain dust deposition of required density. This makes it imperative to have an indoor dust deposited system which can accelerate the process of dust deposition for testing purposes. This paper presents an artificial dust deposition system, which can deposit dust uniformly in a 20 x 20 cm2 area with a non uniformity of 4%. Uniformity of the deposited dust was found by comparing Jsc values among the glass samples at the center and at 5 points within a sample. Dust used for deposition was collected from PV modules, located at IIT-Bombay. Deposition was conducted at three different densities namely, low (0.15mg/cm2), medium (0.55mg/cm2) and high (0.9mg/cm2), to check for uniformity. Jsc losses were calculated using Quantum Efficiency system, for 11 different dust densities ranging from 0.15-2 mg/cm2