A comparison of lighting control strategies for open offices

Lashina, Tatiana; Vleuten-Chraibi, Sanae van der; Despenic, Marija; Shrubsole, Paul; Rosemann, Alp Alexander; Loenen, Evert van

doi:10.1016/j.buildenv.2018.12.013

Cited by 10 publications

(3 citation statements)

References 19 publications

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“…Otherwise, the lighting is kept or turned off. The occupancy control has been reduced energy consumption of the lighting by 20-46% compared with scenario in which the lighting is continuously kept on (hereafter called keeping on scenario), depending on configuration and type of employed occupancy measurement [24][25][26][27].…”

Section: Occupancy Control Using Thermal-based Sensormentioning

confidence: 99%

Experimental Evaluation of Occupancy Lighting Control Using Thermal‐Based Sensor

Hayasaka

Nakajima

Futagami

2022

IEEJ Transactions Elec Engng

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In this paper, we aim to clarify the effectiveness of a thermal-based sensor, which applies image recognition technique to thermal image to measure occupancy state. Our experiment, which was conducted at a single private office over 8 days, evaluated both energy-saving rate of occupancy control and F-measure, which is the comprehensive metric of measurement accuracy. The thermal-based sensor increased the F-measure and energy-saving rate by 2.23% and 27.91%, respectively, compared with the passive infrared sensor, which measures the occupancy state on the basis of change in infrared temperature. Compared with an image-based sensor, which applies image recognition technique to visible image, it can provide high privacy and security preserving capability and detect occupants under completely dark environment. However, the F-measure and energy-saving rate were decreased by 3.13% and 19.07%, respectively. Further results and discussion are included herein toward analysis and improvement of the thermal-based sensor.

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Section: Occupancy Control Using Thermal-based Sensormentioning

confidence: 99%

Experimental Evaluation of Occupancy Lighting Control Using Thermal‐Based Sensor

Hayasaka

Nakajima

Futagami

2022

IEEJ Transactions Elec Engng

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“…The possibility of controlling the illuminance in specific places or to dimmer the environmental lights according to personal preferences or mood is very much appreciated in every indoor environment. Regarding workplaces, previous research demonstrates that personally controlled illumination provides several advantages compared to a fixed light, including more positive office appraisal and satisfaction, improved mood and motivation, and higher self-assessed productivity [59]. In residential spaces, these benefits are still under investigation, because of the variability of schedules and user behaviors.…”

Section: Flexibility and Controlmentioning

confidence: 99%

A Novel Approach for the Definition of an Integrated Visual Quality Index for Residential Buildings

2019

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Visual quality is an important component of indoor environment quality and greatly affects inhabitants’ perception of the living space. Nevertheless, the lighting design of residential buildings is usually underestimated by both designers and standards. This paper presents an integrated index for evaluating the visual quality of an indoor environment in residential buildings. The main parameters considered are daylight access, probability of glare from daylight and electric illumination, maintained illuminance, and color temperature. These aspects are evaluated throughout a whole year using a fixed set of metrics and are combined using relative weights. It was decided to also consider qualitative parameters in order to give more importance to some psychological aspects of visual comfort. Finally, the building visual quality index is obtained by a weighted average of the results of each room with the addition of the qualitative parameters. The applicability of the index was tested through the simulation of a dwelling that will be built and monitored in the context of the Comfort for Sustainable Buildings in the Alps (CASA) research project. The building visual quality index proved to be useful during the design process, allowing for improvements in both electric illumination and daylight access through a comparison of different solutions. This study could represent a step towards the holistic evaluation of indoor environment quality.

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“…An occupancy lighting control, which is categorized as a sensorbased lighting control [3], is a popular and effective automatic lighting control. References [4][5][6][7] reported that compared with a light turned on continuously, the occupancy lighting control might reduce energy consumption by 20-46%. However, implementing the occupancy control requires an occupancy sensor for sensing the presence of the occupant, i.e.…”

Section: Introductionmentioning

confidence: 99%

Experimental Evaluation of Reduction Technique for Time Delay of Turning Off Light to Occupancy Lighting Control

Futagami

Hayasaka

Taniguchi

et al. 2020

IEEJ Transactions Elec Engng

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In this study, we clarify the effectiveness of the energy-effective techniques for the occupancy lighting control that is based on an occupancy sensor. The time delay from detecting no occupant to turning off the light is used for performing the occupancy control to avoid erroneously turning off the light (hereafter referred to as false-off). Our experiment was conducted at an actual home environment over 8 days. We evaluated the performance of an image-based sensor, which detects the occupants using image-processing techniques and time-delay adaptation, which decreases the time delay without false-off. Compared with a passive infrared sensor, the image-based sensor increased the average sensing accuracy for occupants with small movements by 21.58% or more. In addition, compared with the no-adaptation case, the time-delay adaptation increased the rate of average lighting energy saving by 3.94% or more. However, the experimental results suggested that the parameter of the time-delay adaptation should be carefully set in terms of the energy-saving effect and false-off. The analysis and its practical discussions are included in this paper to achieve further energy efficiency.

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A comparison of lighting control strategies for open offices

Cited by 10 publications

References 19 publications

Experimental Evaluation of Occupancy Lighting Control Using Thermal‐Based Sensor

Experimental Evaluation of Occupancy Lighting Control Using Thermal‐Based Sensor

A Novel Approach for the Definition of an Integrated Visual Quality Index for Residential Buildings

Experimental Evaluation of Reduction Technique for Time Delay of Turning Off Light to Occupancy Lighting Control

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