Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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Compensation of Sun Tracking Error caused by the Heliostat Geometrical Error through the Canting of Heliostat Mirror Facets

반사거울 설치 방향 조정에 의한 Heliostat 기구오차에서 기인하는 태양추적오차의 보정

  • Park, Young-Chil (Department of Control and Instrumentation Engineering Seoul National University of Technology)
  • 박영칠 (서울산업대학교 제어계측공학과)
  • Published : 2009.12.30
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Abstract

Canting is the optical alignment of mirror facets of heliostat such that the heliostat could focus the energy as a unit concentrator. Canting could improve the optical performance of heliostat and thus improves the efficiency of heliostat and ultimately improves the efficiency of the solar thermal power plant. This study discusses the effect of mirror canting, especially off-axis canting, used to compensate the sun tracking error caused by the heliostat geometrical errors. We first show that the canting could compensate the sun tracking error caused by the heliostat geometrical errors. Then we show that the proper canting time could exist, depending on the heliostat location. Finally we show how much the sun tracking performance could be improved by canting, by providing RMS sun tracking error. The limitation and caution of using canting to improve the sun tracking performance are also discussed.

Keywords

References

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