Lighting control systems in individual offices at high latitude: measurements of electricity savings and users preferences
Author
Summary, in English
Abstract in Undetermined
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 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 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.
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 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 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.
Publishing year
2014
Language
English
Pages
1987-1996
Publication/Series
Energy Procedia
Volume
57
Document type
Conference paper
Publisher
Elsevier
Topic
- Building Technologies
Keywords
- human factor
- Lighting control systems
- daylight-linked system
- energy saving.
Conference name
ISES Solar World Congress, 2013
Conference date
2013-11-03 - 2013-11-07
Conference place
Cancun, Mexico
Status
Published
Project
- Robust control systems for electric lighting: inventory of existing technology, laboratory tests and field studies
ISBN/ISSN/Other
- ISSN: 1876-6102