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Electrodynamic dust shield performance under simulated operating conditions for solar energy applications.

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Title: Electrodynamic dust shield performance under simulated operating conditions for solar energy applications.
Authors: Guo, Bing1 bing.guo@qatar.tamu.edu, Javed, Wasim1, Pett, Charles2, Wu, Chang-Yu2, Scheffe, Jonathan R.2
Source: Solar Energy Materials & Solar Cells. Oct2018, Vol. 185, p80-85. 6p.
Subject Terms: *Solar energy, *Dust removal, Electrodynamics, Traveling waves (Physics), Standing waves
Abstract: Electrodynamic dust shield (EDS) uses traveling-wave or standing-wave electrodynamic effects to repel dust particles from a surface, and has been proposed as a potential anti-dust solution for mitigating soiling loss in solar energy applications. In this study, a standing-wave EDS technique was tested in a cyclic manner at field-relevant dust loading levels using dust deposited by aerosol deposition, in order to assess the EDS’ dust removal efficiency under simulated real-world operating conditions. Tests using sieve deposition and the single-operation mode were also carried out for comparison. Each single-operation test only used freshly-deposited dust with a single activation of the EDS, and the results showed that the dust removal efficiency with aerosol deposition to be moderately lower than that with sieve deposition. In contrast, a cyclic-operation test consisted of many consecutive cycles, which began with the first cycle using freshly-deposited dust, and each additional cycle having new dust added on top of the persistent dust from the previous cycle. The cyclic-operation dust removal efficiency was found to be strongly dependent on the dust deposition method. Using aerosol deposition, the cyclic-operation efficiency continually decreased as the number of cycles increased; with sieve deposition, the cyclic-operation EDS efficiency fluctuated and had a much higher average value than with aerosol deposition. The different behaviors of the cyclic-operation EDS efficiency can be modeled with two hypothetical scenarios, based on how the persistent dust from a previous cycle reacts to EDS activation. However, the physical mechanisms behind the different behaviors are not well understood. The results from this study suggest that further research is critically needed for evaluating the effectiveness of electrodynamic anti-dust solutions for solar energy applications in dusty environments. [ABSTRACT FROM AUTHOR]
Copyright of Solar Energy Materials & Solar Cells is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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Header DbId: 8gh
DbLabel: GreenFILE
An: 130302239
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PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Electrodynamic dust shield performance under simulated operating conditions for solar energy applications.
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  Data: <searchLink fieldCode="AR" term="%22Guo%2C+Bing%22">Guo, Bing</searchLink><relatesTo>1</relatesTo><i> bing.guo@qatar.tamu.edu</i><br /><searchLink fieldCode="AR" term="%22Javed%2C+Wasim%22">Javed, Wasim</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Pett%2C+Charles%22">Pett, Charles</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Wu%2C+Chang-Yu%22">Wu, Chang-Yu</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Scheffe%2C+Jonathan+R%2E%22">Scheffe, Jonathan R.</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Solar+Energy+Materials+%26+Solar+Cells%22">Solar Energy Materials & Solar Cells</searchLink>. Oct2018, Vol. 185, p80-85. 6p.
– Name: Subject
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  Data: *<searchLink fieldCode="DE" term="%22Solar+energy%22">Solar energy</searchLink><br />*<searchLink fieldCode="DE" term="%22Dust+removal%22">Dust removal</searchLink><br /><searchLink fieldCode="DE" term="%22Electrodynamics%22">Electrodynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Traveling+waves+%28Physics%29%22">Traveling waves (Physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Standing+waves%22">Standing waves</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Electrodynamic dust shield (EDS) uses traveling-wave or standing-wave electrodynamic effects to repel dust particles from a surface, and has been proposed as a potential anti-dust solution for mitigating soiling loss in solar energy applications. In this study, a standing-wave EDS technique was tested in a cyclic manner at field-relevant dust loading levels using dust deposited by aerosol deposition, in order to assess the EDS’ dust removal efficiency under simulated real-world operating conditions. Tests using sieve deposition and the single-operation mode were also carried out for comparison. Each single-operation test only used freshly-deposited dust with a single activation of the EDS, and the results showed that the dust removal efficiency with aerosol deposition to be moderately lower than that with sieve deposition. In contrast, a cyclic-operation test consisted of many consecutive cycles, which began with the first cycle using freshly-deposited dust, and each additional cycle having new dust added on top of the persistent dust from the previous cycle. The cyclic-operation dust removal efficiency was found to be strongly dependent on the dust deposition method. Using aerosol deposition, the cyclic-operation efficiency continually decreased as the number of cycles increased; with sieve deposition, the cyclic-operation EDS efficiency fluctuated and had a much higher average value than with aerosol deposition. The different behaviors of the cyclic-operation EDS efficiency can be modeled with two hypothetical scenarios, based on how the persistent dust from a previous cycle reacts to EDS activation. However, the physical mechanisms behind the different behaviors are not well understood. The results from this study suggest that further research is critically needed for evaluating the effectiveness of electrodynamic anti-dust solutions for solar energy applications in dusty environments. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Solar Energy Materials & Solar Cells is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.solmat.2018.05.021
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      – Code: eng
        Text: English
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        PageCount: 6
        StartPage: 80
    Subjects:
      – SubjectFull: Solar energy
        Type: general
      – SubjectFull: Dust removal
        Type: general
      – SubjectFull: Electrodynamics
        Type: general
      – SubjectFull: Traveling waves (Physics)
        Type: general
      – SubjectFull: Standing waves
        Type: general
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      – TitleFull: Electrodynamic dust shield performance under simulated operating conditions for solar energy applications.
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            NameFull: Guo, Bing
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            NameFull: Javed, Wasim
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            NameFull: Pett, Charles
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            NameFull: Wu, Chang-Yu
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            NameFull: Scheffe, Jonathan R.
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            – D: 01
              M: 10
              Text: Oct2018
              Type: published
              Y: 2018
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              Value: 185
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            – TitleFull: Solar Energy Materials & Solar Cells
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