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Quantification and Modeling of Spectral and Angular Losses of Naturally Soiled PV Modules

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Title Quantification and Modeling of Spectral and Angular Losses of Naturally Soiled PV Modules
 
Creator JOHN, JJ
RAJASEKAR, V
BOPPANA, S
CHATTOPADHYAY, S
KOTTANTHARAYIL, A
TAMIZHMANI, G
 
Subject IMPACT
DUST
Angle of incidence (AOI)
dust
quantum efficiency (QE)
reflectance
soiled photovoltaic (PV) module
soiling
spectral loss
 
Description Spectral and angle of incidence (AOI) losses on naturally soiled crystalline silicon photovoltaic (PV) modules have been investigated in this study. The test modules designated as "moderately soiled (3 g/m(2))" and " heavily soiled (74.6 g/m(2))" showed short-circuit current (I-sc) losses of about 10% and 41%, respectively. The spectral reflectance and quantum efficiency (QE) losses were also quantitatively determined. In the wavelength range of 350-1100 nm, the average reflectance of moderately and heavily soiled modules increased (as compared with the clean surface) by 58.4% and 87.2%, respectively. In the moderately soiled module, the 26.3% (average) reduction in QE is mainly because of 23% of absorption and 5.5% of reflection in the dust. In the highly soiled module, the 75.3% (average) reduction in QE is mainly because of 62% of absorption and 31% of reflection in the dust particles. It is also seen that the typical critical AOI of 57 degrees for cleaned PV modules decreased to 38 degrees for the moderately soiled module and 20 degrees for the heavily soiled module. This influence is crucial for fixed tilt modules as they experience a wide range of AOI during daily operation, and a significant fraction of energy is generated at higher AOIs.
 
Publisher IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
 
Date 2016-01-15T08:55:52Z
2016-01-15T08:55:52Z
2015
 
Type Article
 
Identifier IEEE JOURNAL OF PHOTOVOLTAICS, 5(6)1727-1734
2156-3381
http://dx.doi.org/10.1109/JPHOTOV.2015.2463745
http://dspace.library.iitb.ac.in/jspui/handle/100/18215
 
Language en