Low-cost solar PV soiling sensor validation and size resolved soiling impacts: a comprehensive field study in Western India

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dc.contributor.author Valerino, Michael
dc.contributor.author Bergin, Mike
dc.contributor.author Ghoroi, Chinmay
dc.contributor.author Ratnaparkhi, Aniket
dc.contributor.author Smestad, Greg P.
dc.date.accessioned 2020-05-21T10:45:24Z
dc.date.available 2020-05-21T10:45:24Z
dc.date.issued 2020-07
dc.identifier.citation Valerino, Michael; Bergin, Mike; Ghoroi, Chinmay; Ratnaparkhi, Aniket and Smestad, Greg P., "Low-cost solar PV soiling sensor validation and size resolved soiling impacts: a comprehensive field study in Western India", Solar Energy, DOI: 10.1016/j.solener.2020.03.118, vol. 204, pp. 307-315, Jul. 2020. en_US
dc.identifier.issn 0038-092X
dc.identifier.issn 1471-1257
dc.identifier.uri http://dx.doi.org/10.1016/j.solener.2020.03.118
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/5413
dc.description.abstract Deposition of particulate matter (PM) onto solar photovoltaic (PV) panels - known as soiling - has been estimated to reduce energy production by 10�40% in many regions of the world. Despite this, many key properties including soiling rates, PM source contributions, physical and optical properties of the deposited particles, and the impact of rain and relative humidity (RH) are not well understood. With this in mind we conducted a field study in Gandhinagar, India. Our approach combines soiling monitoring with a reference station and a low-cost digital microscopy system, sample collection for mass loading information, glass sample slides for size resolved soiling impacts, and monitoring of rain, RH, and panel temperature for insight into meteorological impacts on cleaning and soiling rates. Results indicate soiling reduces PV energy production by 0.37 � 0.09% day?1. The low cost (<100$) digital microscope estimated soiling within ~1% of measured losses, confirming the feasibility of this low-cost alternative to expensive soiling stations. Deposited PM decreased energy production by 5.12 � 0.55% per PM mass loading (g m?2). Microscopy analyses of field samples revealed that > 90% of deposited mass loading is from particles > 5 �m in diameter, with > 50% of the soiling impacts estimated to be from particles < 5 �m. While heavy rain cleaned PV panels, light rains and high RH contributed to a 2x soiling rate and 5-10x PM deposition velocities as compared to dry periods.
dc.description.statementofresponsibility by Michael Valerino, Mike Bergin, Chinmay Ghoroi, Aniket Ratnaparkhi and Greg P.Smestad
dc.language.iso en_US en_US
dc.publisher Elsevier en_US
dc.subject Soiling en_US
dc.subject Dust deposition en_US
dc.subject Size distribution en_US
dc.subject PV soiling en_US
dc.subject Photovoltaic en_US
dc.subject Low cost sensor en_US
dc.title Low-cost solar PV soiling sensor validation and size resolved soiling impacts: a comprehensive field study in Western India en_US
dc.type Article en_US
dc.relation.journal Solar Energy


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