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A platform for research: civil engineering, architecture and urbanism
Glazing type (colour and transmittance), daylighting, and human performances at a workspace: A full-scale experiment in Beijing
https://orcid.org/0000-0002-4307-4398
Abstract This study presents a human experiment of effects of glazing types (colour and transmittance) on participants' alertness and mood, working performance, and self-reported satisfaction in a full-scale office in Beijing, China. Seven glazing systems were tested in a winter period (17th Nov 2017–15th Jan 2018). Research methods included lighting measurements, KSS (Karolinska Sleepiness Scale) sleepiness evaluation, PANAS (Positive and Negative Affect Schedule) mood survey, reaction time test (GO/NOGO), and self-reported questionnaires. Key findings are as follows: Circadian Stimulus (CS) can be used as an indicator of alertness and mood in a daylit workspace. If a higher CS level (≥0.3) can be achieved, glazing colour and transmittance would not significantly affect human's alertness and sleepiness. A low CS level (<0.3) would bring in significant negative mood to occupants. On the other hand, the improvement of occupants' mood would be achieved through increasing glazing visual transmittance and/or decreasing its colour saturation. Self-reported satisfactions show that a preference will be given to the glazing systems with neutral colour and/or higher transmittance in terms of visual performance. It is unknown why the glazing systems with a medium CCT of 4400 K or a higher CCT of 8100 K can deliver shorter response time (RT) and better working performance in a reaction time task. It would be necessary to carry on investigations into the human performances and light colour, especially under daylighting conditions.
Highlights Investigation of human performances in a daylit workspace in Beijing, China. Impact of glazing colour and transmittance on alertness, mood, working and visual performances. Experiments of 11 Chinese participants with seven glazing types and various daily times. Implications of effects of glazing and daylighting in terms of Circadian Rhythm and relevant performances.
Glazing type (colour and transmittance), daylighting, and human performances at a workspace: A full-scale experiment in Beijing
https://orcid.org/0000-0002-4307-4398
Abstract This study presents a human experiment of effects of glazing types (colour and transmittance) on participants' alertness and mood, working performance, and self-reported satisfaction in a full-scale office in Beijing, China. Seven glazing systems were tested in a winter period (17th Nov 2017–15th Jan 2018). Research methods included lighting measurements, KSS (Karolinska Sleepiness Scale) sleepiness evaluation, PANAS (Positive and Negative Affect Schedule) mood survey, reaction time test (GO/NOGO), and self-reported questionnaires. Key findings are as follows: Circadian Stimulus (CS) can be used as an indicator of alertness and mood in a daylit workspace. If a higher CS level (≥0.3) can be achieved, glazing colour and transmittance would not significantly affect human's alertness and sleepiness. A low CS level (<0.3) would bring in significant negative mood to occupants. On the other hand, the improvement of occupants' mood would be achieved through increasing glazing visual transmittance and/or decreasing its colour saturation. Self-reported satisfactions show that a preference will be given to the glazing systems with neutral colour and/or higher transmittance in terms of visual performance. It is unknown why the glazing systems with a medium CCT of 4400 K or a higher CCT of 8100 K can deliver shorter response time (RT) and better working performance in a reaction time task. It would be necessary to carry on investigations into the human performances and light colour, especially under daylighting conditions.
Highlights Investigation of human performances in a daylit workspace in Beijing, China. Impact of glazing colour and transmittance on alertness, mood, working and visual performances. Experiments of 11 Chinese participants with seven glazing types and various daily times. Implications of effects of glazing and daylighting in terms of Circadian Rhythm and relevant performances.
Glazing type (colour and transmittance), daylighting, and human performances at a workspace: A full-scale experiment in Beijing
https://orcid.org/0000-0002-4307-4398
Abstract This study presents a human experiment of effects of glazing types (colour and transmittance) on participants' alertness and mood, working performance, and self-reported satisfaction in a full-scale office in Beijing, China. Seven glazing systems were tested in a winter period (17th Nov 2017–15th Jan 2018). Research methods included lighting measurements, KSS (Karolinska Sleepiness Scale) sleepiness evaluation, PANAS (Positive and Negative Affect Schedule) mood survey, reaction time test (GO/NOGO), and self-reported questionnaires. Key findings are as follows: Circadian Stimulus (CS) can be used as an indicator of alertness and mood in a daylit workspace. If a higher CS level (≥0.3) can be achieved, glazing colour and transmittance would not significantly affect human's alertness and sleepiness. A low CS level (<0.3) would bring in significant negative mood to occupants. On the other hand, the improvement of occupants' mood would be achieved through increasing glazing visual transmittance and/or decreasing its colour saturation. Self-reported satisfactions show that a preference will be given to the glazing systems with neutral colour and/or higher transmittance in terms of visual performance. It is unknown why the glazing systems with a medium CCT of 4400 K or a higher CCT of 8100 K can deliver shorter response time (RT) and better working performance in a reaction time task. It would be necessary to carry on investigations into the human performances and light colour, especially under daylighting conditions.
Highlights Investigation of human performances in a daylit workspace in Beijing, China. Impact of glazing colour and transmittance on alertness, mood, working and visual performances. Experiments of 11 Chinese participants with seven glazing types and various daily times. Implications of effects of glazing and daylighting in terms of Circadian Rhythm and relevant performances.
Glazing type (colour and transmittance), daylighting, and human performances at a workspace: A full-scale experiment in Beijing
Chen, Xiaodong (author) / Zhang, Xin (author) / Du, Jiangtao (author)
Building and Environment ; 153 ; 168-185
2019-02-24
18 pages
Article (Journal)
Electronic Resource
English
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