• Title/Summary/Keyword: HCI(Hourly Clearness Index)

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A Study on the Improvement of Classifying Method of the Sky Conditions for Application of the Daylight at Indoor - The Comparison with Cloud Amount and Measured Solar Horizontal Irradiation in Seoul - (실내 주광 활용을 위한 천공 구분 방법 개선에 관한 연구 - 서울의 전운량과 측정 일사량의 비교를 통해 -)

  • Kim, Yu-Sin;Kim, Hyun-Sun;Hong, Seong-Kwan;Park, Byoung-Chul;Choi, An-Seop
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.24 no.1
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    • pp.19-27
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    • 2010

  • Sky cover method can be used to determine sky condition by cloud amount of the Korea Meteorological Administration. And, HCI (Hourly Clearness Index) method is another method determined by measured horizontal global radiation data. The results of the HCI methods of Erbs et al. (1982), Orgill and Hollands (1977) seem to be not good enough because of the air pollution such as smog phenomenon or yellow sand phenomenon and so on. Therefore, HCI should be corrected. The aim of this study is to improve HCI. Therefore, this study is to analyze and compare on the sky conditions from Sky cover method and HCI, and then presents hourly correction factor based on Sky 채팩 method. The results of corrected HCI improved.

  • https://doi.org/10.5207/JIEIE.2010.24.1.019 인용 PDF KSCI

The Analysis and Comparison on the Sky Condition between Cloud Amount and Measured Solar Horizontal Irradiation in Seoul (서울의 기상청 전 운량과 측정 일사량에 의한 천공 데이터 비교 분석)

  • Hong, Seong-Kwan;Park, Byoung-Chul;Choi, An-Seop;Lee, Jeong-Ho
    • 한국태양에너지학회:학술대회논문집
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    • 2008.11a
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    • pp.69-74
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    • 2008

  • This study is to analyze and compare on the sky condition of cloud amount and measured solar horizontal irradiation in Seoul. Sky cover method is determination of sky condition used by cloud amount of the Meteorological Administration. And HCI method is determination of sky condition used by measured solar horizontal irradiation. The HCI methods of Erbs et al.(1982), Orgill and Hollands(1977) appear a lot of error because of the air pollution such as smog phenomenon or yellow sand phenomenon and so on. Therefore, The purpose of this study is to improve the method for determination of sky condition.

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