Energy Saving Lighting Control Systems for Open-Plan Offices: A Field Study

Galasiu, Anca D.; Newsham, Guy R.; Suvagau, Cristian; Sander, Daniel M.

doi:10.1582/leukos.2007.04.01.001

Cited by 133 publications

(63 citation statements)

References 11 publications

(8 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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“…Lighting research has focused on occupancy when designing control systems (usually in pursuit of energy efficiency), 1,2 on the effects of light on people's visual comfort and health, [3][4][5][6] and on how light influences people's appearance (often in the context of face recognition). 7,8 Room contents -physical objects -and their effects on light fields have been widely studied, 9 but rarely are occupants and their relationship with the surroundings considered collectively as part of the determinants of lighting conditions.…”

Section: Introductionmentioning

confidence: 99%

Measuring light in field experiments using dummies and objects: A study of concert lighting

Steemers

2018

Lighting Research & Technology

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Lighting experiments were performed in a real context populated with dummies and objects. Using the King's College Chapel in Cambridge as a case study, two field surveys of concert lighting were performed, one with the chapel empty and one with it occupied. In each survey, photometric data were collected under three electric lighting conditions and from six different viewing positions. A comparative analysis indicates that the data gathered from the occupied space represent the luminances more accurately, present a more detailed description of the light distribution, and provide a more extensive set of variables characterising the geometrical details of the visual scene. This study demonstrates the importance of using occupied spaces and considering the presence of occupants in field studies, which could be useful for obtaining a more complete understanding of complex luminous environments.

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“…Yapılan bu araştırmaların birçoğu elektrik enerjisinin optimal kullanılmasına yönelik, aydınlatma sistemlerinde enerji tasarrufu ile ilgilidir. Örneğin; Matta ve Mahmud [6], Galasiu vd [7] ve Dubin [8] aydınlatma sistemlerinde otomatik kontrol sistemlerini kullanarak enerji tasarrufuna gitmişlerdir. Benzer şekilde; Jafrancesco vd [9] çalışmalarında iç mekân aydınlatmasını solar kolektörlerle desteklerken Dounis vd [10] ise enerji tasarrufu için akıllı kontrol sistemlerini kullanmıştır.…”

Section: Introductionunclassified

Yari Di̇rekt Ve Karma Aydinlatma Türleri̇ni̇n Tekni̇k Yönden Karşilaştirilmasi - Comparison of the Semi-Direct and Mixed Type of Lighting in Terms of Technical Aspects

2015

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Bu çalışmada, iç mekân aydınlatmasında yarı direkt ve karma aydınlatma türlerinin teknik yönden karşılaştırılması yapılmış ve bu aydınlatma türlerinin seçiminin iç mekân aydınlatmasına katkısından bahsedilmiştir. Çalışma için örnek iki farklı ortam seçilmiş ve tüm fiziksel ortam koşulları aynı kalmak şartıyla sadece aydınlatma türleri değiştirilmiştir. Ortamda yarı direkt ve karma aydınlatma türleri kullanılmış ve bu iki aydınlatma çeşidi için ayrı ayrı ortam içerisinde yerden 90 cm sabit yükseklikte birçok noktada aydınlık düzeyi ölçümleri yapılmıştır. Ölçülen bu değerler bir kâğıt üzerine matris şeklinde kaydedilmiştir. Daha sonra, bu iki aydınlatma çeşidi için kaydedilen bu değerler MATLAB ortamında üç boyutlu olarak grafiklendirilip karşılaştırılmıştır. Böylece bir aydınlatma sisteminin tasarımı aşamasında seçilen aydınlatma türünün aydınlatma elemanlarının gereksinim duyduğu enerji talebindeki azalmaları da beraberinde getirdiği gözlemlenmiştir. Sonuç olarak bu çalışmada, iç mekân aydınlatma türü ve aydınlık düzeyi dağılımı ilişkisi, yapılan ölçümlerle sayısal olarak karşılaştırılmıştır. Aydınlatma türü seçiminin hem ekonomiklik hem de kullanım açısından aydınlatma sistemlerine olumlu katkıda bulunduğu sonucuna ulaşılmıştır.

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Energy Saving Lighting Control Systems for Open-Plan Offices: A Field Study

Cited by 133 publications

References 11 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

Measuring light in field experiments using dummies and objects: A study of concert lighting

Yari Di̇rekt Ve Karma Aydinlatma Türleri̇ni̇n Tekni̇k Yönden Karşilaştirilmasi - Comparison of the Semi-Direct and Mixed Type of Lighting in Terms of Technical Aspects

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