New & Renewable Energy (신재생에너지)

Korean Society for New and Renewable Energy (한국신·재생에너지학회)
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Analysis of Soiling for the Installation Direction of PV Module

태양전지 모듈의 설치방향에 따른 오염특성 분석

  • Lee, Chung Geun (Graduate School of Energy Science and Technology, Chungnam National University) ;
  • Shin, Woo Gyun (Photovoltaics Research Department, Korea Institute of Energy Research) ;
  • Lim, Jong Rok (Photovoltaics Research Department, Korea Institute of Energy Research) ;
  • Ju, Young Chul (Photovoltaics Research Department, Korea Institute of Energy Research) ;
  • Hwang, Hye Mi (Photovoltaics Research Department, Korea Institute of Energy Research) ;
  • Ko, Suk Whan (Photovoltaics Research Department, Korea Institute of Energy Research) ;
  • Chang, Hyo Sik (Graduate School of Energy Science and Technology, Chungnam National University) ;
  • Kang, Gi Hwan (Photovoltaics Research Department, Korea Institute of Energy Research)
  • Received : 2020.10.07
  • Accepted : 2020.11.01
  • Published : 2020.12.25
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Abstract

Soiling on the surface of a PV module reduces the amount of light reaching the solar cells, decreasing power performance. The performance of the PV module is generally restored after contaminants on the module surface are washed away by rain, but it accumulates at the bottom of the module owing to the thickness of the module frame, causing an output mismatch on the PV module. Since PV modules are usually installed horizontally or vertically outdoors, soiling can occur at the bottom of the PV module, depending on the installation direction due to external environmental factors. This paper is analyzed the output characteristics of a PV module considering its installation direction and the soiling area. The soiling was simulated to use transparent films with 5% transmittance, and the transmission film was attached to the bottom part of the PV module horizontally and vertically. When the soiling area was 33% of the string at the bottom of the PV module, the power output decreased similarly regardless of installation direction. However, when the soiling area was 66% of the string at the bottom of the PV module, it was confirmed that the output performance decreased sharply when installed vertically rather than horizontally.

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References

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