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Sustainability 2018, 10(11), 4087; https://doi.org/10.3390/su10114087

Advanced Dimming Control Algorithm for Sustainable Buildings by Daylight Responsive Dimming System

1
Lighting Platform Research Center, Korea Photonics Technology Institute (KOPTI), Gwangju 61007, Korea
2
School of Architecture, Chosun University, Gwangju 61452, Korea
*
Author to whom correspondence should be addressed.
Received: 17 October 2018 / Revised: 3 November 2018 / Accepted: 5 November 2018 / Published: 7 November 2018
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Abstract

This study aims to evaluate the accuracy and energy savings of a daylight responsive dimming system (DRDS) when considering the influence of indirect illuminance. In the case of the existing DRDS, during the calibration process of each luminaire, the other luminaires were turned off to detect the illuminance of both the luminaire and the incoming daylight. However, the work plane illuminance under the luminaires was affected by the indirect illuminance from the other luminaires. The final work plane illuminance would thus be higher than the target illuminance during real system operation. To improve the accuracy and energy savings of the DRDS, an improved dimming control algorithm was applied to the DRDS when considering the influence of indirect illuminance. The real-time power consumption and accuracy of the target illuminance of the DRDS when considering the influence of indirect illuminance in a full-scale mock-up was measured and analyzed (for 23 days, from 22 June to 18 July 2018). As a result, the average accuracy of the target illuminance was 98.9% (SD 0.5%), and the average saving in lighting energy was 77%. View Full-Text
Keywords: LED dimming system; energy savings; daylight; indirect illuminance LED dimming system; energy savings; daylight; indirect illuminance
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Kim, I.-T.; Kim, Y.-S.; Nam, H.; Hwang, T. Advanced Dimming Control Algorithm for Sustainable Buildings by Daylight Responsive Dimming System. Sustainability 2018, 10, 4087.

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