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Field data and simulations to estimate the role of standby energy use of lighting control systems in individual offices

Gentile, Niko LU and Dubois, Marie Claude LU (2017) In Energy and Buildings 155. p.390-403
Abstract

This paper investigates the effectiveness of lighting control systems (LCSs) in 57 individual office rooms of an educational building located in Lund, Sweden. The study uses simulations based on actual occupancy data. The simulations, performed with Daysim via the Honeybee interface, focus on the portion of standby energy use on total lighting energy use considering different combinations of LCSs and lighting power density (LPD). The results show that standby energy use accounts for about 30% of the total lighting energy use, but it can raise up to 55% in extreme cases. The portion of standby energy use increases with lower occupancy rates and lower LPD. As a conclusion, a complete switch-off of systems during unoccupied hours is... (More)

This paper investigates the effectiveness of lighting control systems (LCSs) in 57 individual office rooms of an educational building located in Lund, Sweden. The study uses simulations based on actual occupancy data. The simulations, performed with Daysim via the Honeybee interface, focus on the portion of standby energy use on total lighting energy use considering different combinations of LCSs and lighting power density (LPD). The results show that standby energy use accounts for about 30% of the total lighting energy use, but it can raise up to 55% in extreme cases. The portion of standby energy use increases with lower occupancy rates and lower LPD. As a conclusion, a complete switch-off of systems during unoccupied hours is fundamental to preserve savings from LCSs. In addition, the article argues that, when standby energy use cannot be minimized or eliminated, daylight design and very efficient light sources may reduce the need for complex LCSs in individual office rooms or the like.

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Please use this url to cite or link to this publication:
author
and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Daylight, Daylight harvesting, Dimming, Energy efficiency, Energy saving, Field data, Functional illumination, Led, Lighting, Lighting control system, Occupancy, Parasitic, Photoelectric, PIR, Sensor, Simulation, Standby, Switch
in
Energy and Buildings
volume
155
pages
14 pages
publisher
Elsevier
external identifiers
  • scopus:85029711653
  • wos:000414107200034
ISSN
0378-7788
DOI
10.1016/j.enbuild.2017.09.028
project
Robust control systems for electric lighting: inventory of existing technology, laboratory tests and field studies
language
English
LU publication?
yes
id
96383025-d8c0-4dcf-9da4-a4faa0885e18
date added to LUP
2017-10-02 16:10:24
date last changed
2025-01-07 21:39:30
@article{96383025-d8c0-4dcf-9da4-a4faa0885e18,
  abstract     = {{<p>This paper investigates the effectiveness of lighting control systems (LCSs) in 57 individual office rooms of an educational building located in Lund, Sweden. The study uses simulations based on actual occupancy data. The simulations, performed with Daysim via the Honeybee interface, focus on the portion of standby energy use on total lighting energy use considering different combinations of LCSs and lighting power density (LPD). The results show that standby energy use accounts for about 30% of the total lighting energy use, but it can raise up to 55% in extreme cases. The portion of standby energy use increases with lower occupancy rates and lower LPD. As a conclusion, a complete switch-off of systems during unoccupied hours is fundamental to preserve savings from LCSs. In addition, the article argues that, when standby energy use cannot be minimized or eliminated, daylight design and very efficient light sources may reduce the need for complex LCSs in individual office rooms or the like.</p>}},
  author       = {{Gentile, Niko and Dubois, Marie Claude}},
  issn         = {{0378-7788}},
  keywords     = {{Daylight; Daylight harvesting; Dimming; Energy efficiency; Energy saving; Field data; Functional illumination; Led; Lighting; Lighting control system; Occupancy; Parasitic; Photoelectric; PIR; Sensor; Simulation; Standby; Switch}},
  language     = {{eng}},
  month        = {{11}},
  pages        = {{390--403}},
  publisher    = {{Elsevier}},
  series       = {{Energy and Buildings}},
  title        = {{Field data and simulations to estimate the role of standby energy use of lighting control systems in individual offices}},
  url          = {{http://dx.doi.org/10.1016/j.enbuild.2017.09.028}},
  doi          = {{10.1016/j.enbuild.2017.09.028}},
  volume       = {{155}},
  year         = {{2017}},
}