| Title |
Energy Saving and User Satisfaction Evaluation through Empirical Research on a Lighting Control System for Circadian Rhythm Based on an Daylight Sensor Dimming Control Algorithm |
| Authors |
Jeong-Ju Park ; In-Tae Kim ; An-Seop Choi ; Yu-Sin Kim |
| DOI |
http://doi.org/10.5207/JIEIE.2024.38.3.161 |
| Keywords |
Circadian rhythm regulation; Daylighting responsive dimming system; Energy-savings; Empirical study; Human-centric lighting; Indoor shading automated control system |
| Abstract |
In modern society, energy conservation is an emerging essential task. Since modern people spend most of their daytime hours indoors, they are greatly influenced by artificial lighting, thus there is a need for the development of human-centered lighting is reguired that helps regulate Circadian rhythm. In this study, an energy-saving control system was developed for public institutions, to conserve lighting energy. Energysaving control system was developed by integrating a daylight-responsive dimming algorithm, which adjusts indoor lighting brightness by sensing the amount of daylight entering the building, and an indoor shading automatic control algorithm, which adjusts the shading based on solar radiation and changes in the sun’s altitude. In addition, an empirical study analyzed the energy-saving effect achieved by a color temperature control algorithm, which helps regulate Circadian rhythm when applying the energy-saving control system. The empirical study targeted the Administrative Welfare Center, a public institution building, and lasted for a total 18 months from September 26, 2022 to February 29, 2024. The energy saving was analysed from 09:00 to 18:00. Additionally, a satisfaction survey was carried out among workers to assess their experiences with dimming control, shading control, and correlated color temperature variation. Base on the analysis, the lighting energy saving effect was found to be 21.5% on average. Additionally the satisfaction survey revealed that the most respondents were content with dimming control, shading control, and color temperature variation scoring an average of 3 or more. |