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Lighting control systems in individual offices at high latitude: measurements of lighting conditions and electricity savings

Gentile, Niko LU ; Laike, Thorbjörn LU and Dubois, Marie-Claude LU (2016) In Solar Energy 127. p.113-123
Abstract
An efficient lighting control systems (LCS) should take advantage of the natural light available, but this presents some technical challenges as well as user related issues. So far, the assessment of lighting energy consumption of LCS has been based on technical features rather than the occupants’ acceptance. This article presents the results of a monitoring study providing some recommendations based on the human and technical aspects of LCS in small scale applications. Four identical peripheral office rooms located in Lund, Sweden, were equipped with four different LCS: manual switch at the door, presence detector, daylight dimming with absence detector and LED task lamp. Each occupant performed ordinary office tasks for two weeks in each... (More)
An efficient lighting control systems (LCS) should take advantage of the natural light available, but this presents some technical challenges as well as user related issues. So far, the assessment of lighting energy consumption of LCS has been based on technical features rather than the occupants’ acceptance. This article presents the results of a monitoring study providing some recommendations based on the human and technical aspects of LCS in small scale applications. Four identical peripheral office rooms located in Lund, Sweden, were equipped with four different LCS: manual switch at the door, presence detector, daylight dimming with absence detector and LED task lamp. Each occupant performed ordinary office tasks for two weeks in each room in April-May 2013. A subjective evaluation concerning the general lighting experience and the appreciation of the LCS was carried out. The results indicate that the manual switch with absence detector was greatly appreciated and it accomplished good energy performances (75% savings compared to the presence detector). The daylight-linked LCS achieved only slightly higher savings (79%), due to relatively high parasitic losses, but it did not guarantee an optimal light environment. The desk lamp achieved 97% savings, but the lighting conditions were considered unacceptable by the office workers. In general, the participants in this study perceived all automatic controls as stressful. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Lighting control systems, Occupancy strategy, Daylight harvesting, Energy saving.
in
Solar Energy
volume
127
pages
113 - 123
publisher
Elsevier
external identifiers
  • scopus:84956707663
  • wos:000371942400011
ISSN
0038-092X
DOI
10.1016/j.solener.2015.12.053
language
English
LU publication?
yes
id
9a40a92a-46df-4020-b9c7-6e6ea80e93f4 (old id 7522019)
date added to LUP
2016-02-10 14:00:00
date last changed
2017-10-22 03:58:20
@article{9a40a92a-46df-4020-b9c7-6e6ea80e93f4,
  abstract     = {An efficient lighting control systems (LCS) should take advantage of the natural light available, but this presents some technical challenges as well as user related issues. So far, the assessment of lighting energy consumption of LCS has been based on technical features rather than the occupants’ acceptance. This article presents the results of a monitoring study providing some recommendations based on the human and technical aspects of LCS in small scale applications. Four identical peripheral office rooms located in Lund, Sweden, were equipped with four different LCS: manual switch at the door, presence detector, daylight dimming with absence detector and LED task lamp. Each occupant performed ordinary office tasks for two weeks in each room in April-May 2013. A subjective evaluation concerning the general lighting experience and the appreciation of the LCS was carried out. The results indicate that the manual switch with absence detector was greatly appreciated and it accomplished good energy performances (75% savings compared to the presence detector). The daylight-linked LCS achieved only slightly higher savings (79%), due to relatively high parasitic losses, but it did not guarantee an optimal light environment. The desk lamp achieved 97% savings, but the lighting conditions were considered unacceptable by the office workers. In general, the participants in this study perceived all automatic controls as stressful.},
  author       = {Gentile, Niko and Laike, Thorbjörn and Dubois, Marie-Claude},
  issn         = {0038-092X},
  keyword      = {Lighting control systems,Occupancy strategy,Daylight harvesting,Energy saving.},
  language     = {eng},
  pages        = {113--123},
  publisher    = {Elsevier},
  series       = {Solar Energy},
  title        = {Lighting control systems in individual offices at high latitude: measurements of lighting conditions and electricity savings},
  url          = {http://dx.doi.org/10.1016/j.solener.2015.12.053},
  volume       = {127},
  year         = {2016},
}