Lighting Control Including Daylight and Energy Efficiency Improvements Analysis

Kaminska, A.; Ożadowicz, A.

doi:10.3390/en11082166

Cited by 50 publications

(36 citation statements)

References 43 publications

(56 reference statements)

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“…Previous studies introduced various approaches to office buildings in order to save energy on lighting [3][4][5][6][7][8][9][10][11]. One approach is daylight-linked control, which adjusts the dimming level of lights based on illumination intensity in accordance with the amount of daylight and artificial light [3][4][5][6][7]. Another approach is individual occupancy control (IC), which turns on only lights that are close to occupants (people at the office) [3,[8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Experimental evaluation for daylight‐linked gradation lighting control using image‐based motion sensors

Futagami

Yano

Huang

et al. 2020

IEEJ Transactions Elec Engng

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In this study, we propose a daylight‐linked gradation lighting control, which adjusts the dimming level of a light above an occupant according to daylight and also gradually lowers the dimming level of surrounding lights based on the distance from the occupants by using image‐based motion sensors. We evaluated it in terms of both energy savings and visual comfort of the occupants in comparison experiments. Compared with the individual occupancy control (IC), the actual and simulated median energy savings of daylight‐linked gradation control (DGC) were 27.1 and 28.9%, respectively, per day. The results of a questionnaire consisting of seven questions and using a semantic differential method for scoring visual comfort showed that the DGC tended to improve visual comfort compared with the IC. Further experiments, however, are needed as only four of nine occupants responded to the questions. In addition, we found that the DGC creates a smoother contrast in the office than the IC, which may produce conspicuous changes in illumination intensity. Finally, we analyzed the advantages and disadvantages of the DGC on the basis of our experimental results. © 2020 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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Section: Introductionmentioning

confidence: 99%

“…The energy savings of daylight-linked control range from 20 to 31%, depending on the amount of available daylight [3][4][5]. In addition, the energy savings of IC range from 13 to 35%, depending on the occupancy patterns or types of work [3,8,11].…”

Section: Introductionmentioning

confidence: 99%

Experimental evaluation for daylight‐linked gradation lighting control using image‐based motion sensors

Futagami

Yano

Huang

et al. 2020

IEEJ Transactions Elec Engng

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“…The heating system in the SKNX and EIEE Laboratory building is designed in such a way that it is possible to estimate the heat consumption in each room and implement various control algorithms as well as to measure, record and visualize useful data [39]. Panel radiators are used as the heating devices.…”

Section: Control System and Data Acquisitionmentioning

confidence: 99%

Impact of Heating Control Strategy and Occupant Behavior on the Energy Consumption in a Building with Natural Ventilation in Poland

Kaminska

2019

Energies

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This study aims to provide an experimental assessment of energy consumption in an existing public building in Poland, in order to analyze the impact of occupant behavior on that consumption. The building is naturally ventilated and the occupants have the freedom to change the temperature set point and open or close the windows. The energy consumption is calculated and the calculation results are compared with the experimental data. An analysis of occupants’ behavior has revealed that they choose temperature set points in a wide range recognized as thermal comfort, and window opening is accidental and difficult to predict. The implemented heating control algorithms take into account the strong influence of individual occupant preferences on the feeling of comfort. The energy consumption assessment has revealed that the lowering of temperature set point by 1 °C results in an energy saving of about 5%. Comparisons of energy consumption with heating control and without any controls showed that the potential for energy reduction due to heating control reached approximately 10%. The use of windows control, which allows to turn off the heating after opening the window and its impact on energy savings have been discussed as well.

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“…To reduce the energy consumption associated with the installed lighting, light-emitting diode (LED) luminaires are used because they have high efficiency and a long lifetime. Architectural design studies have been performed to reduce the lighting energy consumption by actively using daylight [3][4][5][6][7][8][9][10][11][12][13][14]. In addition, to further reduce the lighting energy consumption, a daylight-responsive dimming system (DRDS) that utilizes indoor incident daylight is typically used.…”

Section: Research Purposementioning

confidence: 99%

High-Performance Accuracy of Daylight-Responsive Dimming Systems with Illuminance by Distant Luminaires for Energy-Saving Buildings

Kim

Cho

et al. 2019

Energies

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In a conventional daylight-responsive dimming system (DRDS), all the luminaires are turned off during the calibration process except for the luminaire under consideration in order to sense only the workplane illuminance of that luminaire. However, the workplane illuminance of the luminaire is influenced by other luminaires. Therefore, the final workplane illuminance of the actual operated system is higher than the target workplane illuminance, reducing the energy-saving efficiency of the DRDS. Herein, to improve the conventional DRDS, an advanced commissioning prediction method of daylight illuminance, and a dimming control algorithm considering the influences by distant luminaires are proposed. To evaluate the accuracy of the proposed prediction method of daylight illuminance, the daylight illuminance on the workplane and the photo sensor values of six points were measured in a full-scale mockup for 27 consecutive days from 22 June to 18 July 2018. As a result of root-mean-square error (RMSE) analysis of daylight illuminance and the photo sensor values, the RMSE (64.86) of P3 located in the middle of the room was the highest, and the RMSE value (17.60) of P5 located near the window was the lowest. In addition, the power consumption of the luminaires, and the target illuminance accuracy of the proposed DRDS were measured and analyzed for 32 consecutive days from 19 July to 19 August 2018 in a full-scale mockup. The average target illuminance accuracy was 96.9% (SD 2.2%), the average lighting energy-savings ratio was 78.4%, and the daylight illuminance prediction accuracy was 95.5% (SD 3.4%).

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Lighting Control Including Daylight and Energy Efficiency Improvements Analysis

Cited by 50 publications

References 43 publications

Experimental evaluation for daylight‐linked gradation lighting control using image‐based motion sensors

Experimental evaluation for daylight‐linked gradation lighting control using image‐based motion sensors

Impact of Heating Control Strategy and Occupant Behavior on the Energy Consumption in a Building with Natural Ventilation in Poland

High-Performance Accuracy of Daylight-Responsive Dimming Systems with Illuminance by Distant Luminaires for Energy-Saving Buildings

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