KIEAE Journal

Korea Institute of Ecological Architecture and Environment (한국생태환경건축학회)
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Development and Validation of Sky Simulator for Reproducing CIE Overcast Sky Model

돔형 인공천공의 개발 및 CIE표준담천공 구현 검증에 관한 연구

  • Received : 2010.10.28
  • Accepted : 2010.12.03
  • Published : 2010.12.30
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Abstract

Sky simulator is a effective daylighting design tool that can evaluate three dimensional performance of lighting. Especially, the dome type sky simulator offer reliable and reproducible daylighting performance with different standard sky models. Recently, K university has developed the dome type sky simulator(sky dome) with the diameter of 6.5m and the height of 3.7m. The sky dome consists of a group of 145 large steel panels with 72 halogen lamps which are arranged in a circular array. The luminance distribution of the sky dome can be calibrated by changing the angle and the brightness of the lamps respectively. To allow more reliable prediction and evaluation of daylighting through the sky dome, It is essential to validate the sky luminance distribution of the sky dome. This study consider the validation of the comparisons between the measured and the calculated luminance values for the CIE standard overcast sky. Also, the error rate between the measured and the calculated luminance values were compared to the previous studies. The results indicated that the K university sky dome can reproduce reliable CIE standard overcast sky with the average relative error rate of 4.4% and root-mean-square error(RMSE) of 5.4%.

Keywords

References

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