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Debris-induced consequences on turbulence and vorticity in solar photovoltaic module-generated array wakes.

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Title: Debris-induced consequences on turbulence and vorticity in solar photovoltaic module-generated array wakes.
Authors: Smith, Sarah E.1 (AUTHOR), Calaf, Marc2 (AUTHOR), Cal, Raúl Bayoán1 (AUTHOR) rcal@pdx.edu, Obligado, Martín3 (AUTHOR), Djeridi, Henda3 (AUTHOR)
Source: Journal of Renewable & Sustainable Energy. May2024, Vol. 16 Issue 3, p1-11. 11p.
Subject Terms: *Particle image velocimetry, *Turbulence, *Vortex motion, *Single-phase flow, *Granular flow, *Solar power plants, *Particle tracks (Nuclear physics), *Photovoltaic power systems
Abstract: Particle-laden flows in solar photovoltaic (PV) systems are inevitable, where wind-swept debris in open environments are carried by high winds and turbulence, coating panel surfaces or damaging structures. Particle deposition, or soiling, is a well-known issue for large-scale plants which rely on uninhibited solar rays for optimal production. But understanding the mechanisms leading to soiling requires a physical and fluid dynamics-centered focus, since turbulence dominates PV panel wakes and is also known to alter particle concentration and trajectories. This study presents an experimental campaign toward consequences of particle-laden flow between two model PV panels using time-resolved particle image velocimetry. The model array was subjected to varied particle volume fractions, including a tracer particle case and a water droplet case. Characterization of mean velocity, turbulence statistics, and mean kinetic energy within the single phase and, separately, particle phase flows showed modified features due to particle inertia. Images captured at a frequency of 1 kHz in the near wake of the upstream panel allow for a first experimental look at vorticity and convective velocity of vortex structures for single-phase and particle-phase flows which are crucial to debris transport and soiling in PV environments. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
FullText Text:
  Availability: 0
Header DbId: enr
DbLabel: Energy & Power Source
An: 178147773
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Debris-induced consequences on turbulence and vorticity in solar photovoltaic module-generated array wakes.
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  Data: <searchLink fieldCode="AR" term="%22Smith%2C+Sarah+E%2E%22">Smith, Sarah E.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Calaf%2C+Marc%22">Calaf, Marc</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cal%2C+Raúl+Bayoán%22">Cal, Raúl Bayoán</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> rcal@pdx.edu</i><br /><searchLink fieldCode="AR" term="%22Obligado%2C+Martín%22">Obligado, Martín</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Djeridi%2C+Henda%22">Djeridi, Henda</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Renewable+%26+Sustainable+Energy%22">Journal of Renewable & Sustainable Energy</searchLink>. May2024, Vol. 16 Issue 3, p1-11. 11p.
– Name: Subject
  Label: Subject Terms
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  Data: *<searchLink fieldCode="DE" term="%22Particle+image+velocimetry%22">Particle image velocimetry</searchLink><br />*<searchLink fieldCode="DE" term="%22Turbulence%22">Turbulence</searchLink><br />*<searchLink fieldCode="DE" term="%22Vortex+motion%22">Vortex motion</searchLink><br />*<searchLink fieldCode="DE" term="%22Single-phase+flow%22">Single-phase flow</searchLink><br />*<searchLink fieldCode="DE" term="%22Granular+flow%22">Granular flow</searchLink><br />*<searchLink fieldCode="DE" term="%22Solar+power+plants%22">Solar power plants</searchLink><br />*<searchLink fieldCode="DE" term="%22Particle+tracks+%28Nuclear+physics%29%22">Particle tracks (Nuclear physics)</searchLink><br />*<searchLink fieldCode="DE" term="%22Photovoltaic+power+systems%22">Photovoltaic power systems</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Particle-laden flows in solar photovoltaic (PV) systems are inevitable, where wind-swept debris in open environments are carried by high winds and turbulence, coating panel surfaces or damaging structures. Particle deposition, or soiling, is a well-known issue for large-scale plants which rely on uninhibited solar rays for optimal production. But understanding the mechanisms leading to soiling requires a physical and fluid dynamics-centered focus, since turbulence dominates PV panel wakes and is also known to alter particle concentration and trajectories. This study presents an experimental campaign toward consequences of particle-laden flow between two model PV panels using time-resolved particle image velocimetry. The model array was subjected to varied particle volume fractions, including a tracer particle case and a water droplet case. Characterization of mean velocity, turbulence statistics, and mean kinetic energy within the single phase and, separately, particle phase flows showed modified features due to particle inertia. Images captured at a frequency of 1 kHz in the near wake of the upstream panel allow for a first experimental look at vorticity and convective velocity of vortex structures for single-phase and particle-phase flows which are crucial to debris transport and soiling in PV environments. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=178147773
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1063/5.0196823
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 11
        StartPage: 1
    Subjects:
      – SubjectFull: Particle image velocimetry
        Type: general
      – SubjectFull: Turbulence
        Type: general
      – SubjectFull: Vortex motion
        Type: general
      – SubjectFull: Single-phase flow
        Type: general
      – SubjectFull: Granular flow
        Type: general
      – SubjectFull: Solar power plants
        Type: general
      – SubjectFull: Particle tracks (Nuclear physics)
        Type: general
      – SubjectFull: Photovoltaic power systems
        Type: general
    Titles:
      – TitleFull: Debris-induced consequences on turbulence and vorticity in solar photovoltaic module-generated array wakes.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Smith, Sarah E.
      – PersonEntity:
          Name:
            NameFull: Calaf, Marc
      – PersonEntity:
          Name:
            NameFull: Cal, Raúl Bayoán
      – PersonEntity:
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            NameFull: Obligado, Martín
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            NameFull: Djeridi, Henda
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            – D: 01
              M: 05
              Text: May2024
              Type: published
              Y: 2024
          Identifiers:
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              Value: 19417012
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              Value: 16
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              Value: 3
          Titles:
            – TitleFull: Journal of Renewable & Sustainable Energy
              Type: main
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