Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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Evaluation of Daylighting Performance in Office Building with Detailed Global Illuminance Data of Selected Korean Cities

정밀 전천공조도 데이터를 활용한 국내 주요도시 업무용 건물의 자연채광 활용성능 평가

  • Choi, Su-Hyun (Department of Architectural Engineering, Chungbuk University) ;
  • Shin, Sang-Yong (Department of Architectural Engineering, Chungbuk University) ;
  • Seo, Dong-Hyun (Department of Architectural Engineering, Chungbuk University)
  • 최수현 (충북대학교 건축공학과) ;
  • 신상용 (충북대학교 건축공학과 대학원) ;
  • 서동현 (충북대학교 건축공학과)
  • Received : 2016.09.04
  • Accepted : 2016.12.19
  • Published : 2016.12.30
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Abstract

In this study, long-term global illuminance data for 19 selected cities are calculated from modeled solar radiation data, AEER's TMY2. Perez model in Daysim daylight simulation tool is used for the solar radiation to illuminance conversion. And then, daylight availability in an unit office space is evaluated for the 19 cities. For this evaluation, various daylight performance indices are reviewed since static daylight performance index such as daylight factor (DF) and annual average global illuminance value is not suitable for actual performance evaluation in terms of visual comfort and light energy saving of a space. This study evaluated daylighting performance of prototypical office space module by introducing DA (daylight autonomy) and UDI (Useful Daylight Illuminance) index for major cities of Korea. Result shows that there is upto 18% of illuminance level difference with annual average global illuminance data, but if we consider useful daylight in a space the illuminance level difference among the cities are only within 5%. This means that for sustainable building design especially in daylight design, amount of annual global illuminance is not important factor even in cloudy cities. Daylight design and daylight harvesting system would return similar energy saving impact regardless of building location.

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References

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