Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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The Influence of Photosensor Configurations on Control Performance of Daylight Dimming Systems in a Small Private Office

소규모 개인 사무실 공간에서 포토센서 적용조건에 따른 디밍 제어효과 분석

  • Kim, Soo-Young (Dept. of Housing and Interior Design, Yonsei University) ;
  • Lee, Ji-Hyun (Graduate School of Culture Technology, KAIST)
  • Received : 2011.01.21
  • Accepted : 2011.02.15
  • Published : 2011.03.10
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Abstract

This study examines influences of a daylight dimming control system on the variation of indoor illuminance and lighting energy savings in a small office space. Field measurements and a series of computation were performed for typical types of sky conditions in summer. Results indicate that the daylight illuminance under clear and partly-cloudy sky were close to the target illuminance during a majority of time due to a higher ratio of window to wall. However, the target illuminance was not kept successfully due to the variation of photosensor signals which were strongly influenced by desktop illuminance. The system with partially-shielded conditions succeeded to keep target illuminance under clear sky conditions. The system failed under overcast sky conditions since the electric light output from fixtures caused excessive signals to photosensors due to insufficient daylight on a desktop. Unshielded and fully-shielded conditions were not recommended for effective controls of the systems. The influence of lighting fixtures on photosensors should be minimized to achieve successful lighting controls by daylight dimming systems.

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References

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