Journal article Open Access

Modelling photovoltaic soiling losses through optical characterization

Smestad, Greg P; Germer, Thomas A; Alrashidi, Hameed; Fernández, Eduardo F.; Dey, Sumon; Brahma, Honey; Sarmah, Nabin; Ghosh, Aritra; Sellami, Nazmi; Hassan, Ibrahim A I; Desouky, Mai; Kasry, Amal; Pesala, Bala; Sundaram, Senthilarasu; Almonacid, Florencia; Reddy, K. S.; Mallick, Tapas K.; Micheli, Leonardo


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    "doi": "10.1038/s41598-019-56868-z", 
    "description": "<p>The accumulation of soiling on photovoltaic (PV) modules affects PV systems worldwide. Soiling consists of mineral dust, soot particles, aerosols, pollen, fungi and/or other contaminants that deposit on the surface of PV modules. Soiling absorbs, scatters, and reflects a fraction of the incoming sunlight, reducing the intensity that reaches the active part of the solar cell. Here, we report on the comparison of naturally accumulated soiling on coupons of PV glass soiled at seven locations worldwide. The spectral hemispherical transmittance was measured. It was found that natural soiling disproportionately impacts the blue and ultraviolet (UV) portions of the spectrum compared to the visible and infrared (IR). Also, the general shape of the transmittance spectra was similar at all the studied sites and could adequately be described by a modified form of the &Aring;ngstr&ouml;m turbidity equation. In addition, the distribution of particles sizes was found to follow the IEST-STD-CC 1246E cleanliness standard. The fractional coverage of the glass surface by particles could be determined directly or indirectly and, as expected, has a linear correlation with the transmittance. It thus becomes feasible to estimate the optical consequences of the soiling of PV modules from the particle size distribution and the cleanliness value.</p>", 
    "language": "eng", 
    "title": "Modelling photovoltaic soiling losses through optical characterization", 
    "license": {
      "id": "CC-BY-4.0"
    }, 
    "journal": {
      "volume": "8", 
      "title": "Scientific Reports"
    }, 
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    "keywords": [
      "Photovoltaics", 
      "Soiling"
    ], 
    "publication_date": "2020-01-09", 
    "creators": [
      {
        "affiliation": "Sol Ideas Technology Development, P.O. Box 5729, San Jos\u00e9, California, 95150, USA", 
        "name": "Smestad, Greg P"
      }, 
      {
        "affiliation": "National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD, USA", 
        "name": "Germer, Thomas A"
      }, 
      {
        "affiliation": "University of Exeter, Penryn, UK", 
        "name": "Alrashidi, Hameed"
      }, 
      {
        "affiliation": "Centro de Estudios Avanzados en Energ\u00eda y Medio Ambiente (CEAEMA), Universidad de Ja\u00e9n, 23071, Ja\u00e9n, Spain", 
        "name": "Fern\u00e1ndez, Eduardo F."
      }, 
      {
        "affiliation": "Academy of Scientific and Innovative Research, Chennai, 600113, India", 
        "name": "Dey, Sumon"
      }, 
      {
        "affiliation": "Tezpur University, Tezpur, India", 
        "name": "Brahma, Honey"
      }, 
      {
        "affiliation": "Tezpur University, Tezpur, India", 
        "name": "Sarmah, Nabin"
      }, 
      {
        "affiliation": "University of Exeter, Penryn, UK", 
        "name": "Ghosh, Aritra"
      }, 
      {
        "affiliation": "Robert Gordon University, Aberdeen, UK", 
        "name": "Sellami, Nazmi"
      }, 
      {
        "affiliation": "Department of Chemistry, South Valley University, 83523, Qena, Egypt", 
        "name": "Hassan, Ibrahim A I"
      }, 
      {
        "affiliation": "Nanotechnology Research Centre, The British University in Egypt, 11837, El Sherouk City, Cairo, Egypt", 
        "name": "Desouky, Mai"
      }, 
      {
        "affiliation": "Nanotechnology Research Centre, The British University in Egypt, 11837, El Sherouk City, Cairo, Egypt", 
        "name": "Kasry, Amal"
      }, 
      {
        "affiliation": "CSIR-Central Electronics Engineering Research Institute & Academy of Scientific and Innovative Research, Chennai, 600113, India", 
        "name": "Pesala, Bala"
      }, 
      {
        "affiliation": "University of Exeter, Penryn, UK", 
        "name": "Sundaram, Senthilarasu"
      }, 
      {
        "affiliation": "Centro de Estudios Avanzados en Energ\u00eda y Medio Ambiente (CEAEMA), Universidad de Ja\u00e9n, 23071, Ja\u00e9n, Spain", 
        "name": "Almonacid, Florencia"
      }, 
      {
        "affiliation": "Indian Institute of Technology Madras, Chennai, India", 
        "name": "Reddy, K. S."
      }, 
      {
        "affiliation": "University of Exeter, Penryn, UK", 
        "name": "Mallick, Tapas K."
      }, 
      {
        "orcid": "0000-0001-7986-7560", 
        "affiliation": "Centro de Estudios Avanzados en Energ\u00eda y Medio Ambiente (CEAEMA), Universidad de Ja\u00e9n, 23071, Ja\u00e9n, Spain", 
        "name": "Micheli, Leonardo"
      }
    ], 
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      "subtype": "article", 
      "type": "publication", 
      "title": "Journal article"
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