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Daylighting can lead to energy savings while it also provides outdoor views and has positive non-visual effects, still largely unknown. The dynamic variation of luminance patterns, combined with shading devices, illuminance levels, space configuration, outdoor views and personal subjective factors, all shape the complex influence of daylight on visual comfort, perception, preferences and health.
A systematic categorization of glare and non-visual assessment approaches with respect to standardized tests, sets of environmental conditions, temporal factors and space-occupant configurations, among other parameters, will lead to better understanding of these phenomena and, ultimately, to more robust metrics to characterize discomfort glare, daylight preferences, and non-visual effects.
Related projects
Glare-based shading design and control
Visual comfort and glare evaluation with various window types and shading attachments
Glare prediction using measurement-aided modeling
Personalized daylighting control to dynamically optimize visual satisfaction and lighting energy use
Analysis and comparison of discomfort glare metrics (Collaborators: Prof. Andersen, Dr. Wienold)
Learning personalized visual preferences in daylit offices
HDRI-based glare monitoring and control
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Related publications
S. Lu, T. Wang, A. Tzempelikos, "Glare-based selection of roller shade properties", Building and Environment, 65, 111954, (2024).
S. Lu, A. Tzempelikos, “Comparison of Simulation Methods for Glare Risk Assessment with Roller Shades”, Buildings, 14(6), 1773 (2024).
M. Kim, A. Tzempelikos, “Performance evaluation of non-intrusive luminance mapping towards human-centered daylighting control”, Building and Environment, 213, 108857, (2022).
M. Kim, A. Tzempelikos, “Semi-automated luminance map re-projection via High Dynamic Range Imaging and indoor space 3-D reconstruction”, Automation in Construction, 129, 103812 (2021).
G. Quek, J. Wienold, M. Sarey Khanie, E. Erell, E. Kaftan, A. Tzempelikos, I. Konstantzos, J. Christoffersen, T.E. Kuhn, M. Andersen "Comparing performance of discomfort glare metrics in high and low adaptation levels", Building and Environment, 206, 108335 (2021).
J. Xiong, N. Awalgaonkar, A. Tzempelikos, I. Bilionis, P. Karava, “Efficient learning of personalized visual preferences in daylit offices: an online elicitation framework”, Building and Environment, 181, 107013 (2020).
J. Xiong, A. Tzempelikos, I. Bilionis, P. Karava, "A personalized daylighting control approach to dynamically optimize visual satisfaction and lighting energy use", Energy and Buildings, 193, 111-126 (2019).
J. Xiong, A. Tzempelikos, I. Bilionis, N. Awalgaonkar, S. Lee, I. Konstantzos, A. Sadeghi, P. Karava, “Inferring personalized visual satisfaction profiles in daylit offices from comparative preferences", Building and Environment, 138, 74-88 (2018).
M. Kim, I. Konstantzos, A. Tzempelikos, “Real-time daylight control using a low-cost, window mounted HDRI sensor”, Building and Environment, 177, 106912 (2020).
J. Wienold, T. Iwata, S. Khanie, E. Erell, E. Kraftan, R.G. Rodriguez, J.Y. Garreton, A. Tzempelikos, I. Konstantzos, J. Christoffersen, T.E. Kuhn, M. Andersen, “Cross-validation and robustness of daylight glare metrics”, Lighting Research and Technology, 51(7), 983-1013 (2019).
I. Konstantzos, A. Tzempelikos, "Daylight glare evaluation with the sun in the field of view through window shades", Building and Environment, Vol. 113, pp. 65-77, 2017.
A. Tzempelikos, "Advances on daylighting and visual comfort research", Editorial, Building and Environment, 113, 1-4 (2017).
A. Tzempelikos, Y-C. Chan, “Estimating detailed optical properties of window shades from basic available data and modeling implications on daylighting and visual comfort”, Energy and Buildings, 126, 396-407 (2016).
J. Xiong, A. Tzempelikos, “Model-based shading and lighting control considering visual comfort and energy use”, Solar Energy, 134, 416-428 (2016).
I. Konstantzos, A. Tzempelikos, Y-C. Chan, “Experimental and simulation analysis of daylight glare probability in offices with dynamic window shades”, Building and Environment, 87, 244-254 (2015).
Y-C. Chan, A. Tzempelikos, I. Konstantzos, "A systematic method for selecting shading properties for glare protection", Energy and Buildings, 92, 81-94 (2015).
Y-C. Chan, A. Tzempelikos, "Efficient venetian blind control strategies considering daylight utilization and glare protection", Solar Energy, 98, 241-254 (2013).
S. Lu, A. Tzempelikos, “Selecting shade optical properties for glare protection”, Proceedings of CISBAT 2023 Conference, Lausanne, Switzerland, September 2023.
D. Mah, A. Tzempelikos, “A luminance-based approach for inferring personal daylight preferences using a new composite similarity index”, Proceedings of 7th International High Performance Buildings conference at Purdue, July 2022.
I. Konstantzos, A. Tzempelikos, "Selecting shading properties based on glare mitigation, energy performance and connection to the outdoors", Proceedings of BSA2017: Building Simulation Applications Conference, Bolzano, Italy, February 2017.
I. Konstantzos, A. Tzempelikos, “Design recommendations for perimeter office spaces based on visual environment criteria”, Proceedings of CISBAT15 Conference, Lausanne, Switzerland, September 2015.
Y-C. Chan, A. Tzempelikos, “Impact of Solar Optical Properties of Roller Shades on Energy, Daylighting and Comfort”, Proceedings of ASHRAE Annual conference, Atlanta, June 2015.
Y-C. Chan, A. Tzempelikos, “Window shades: selecting optical properties for visual comfort”, Proceedings of BSA2015: Building Simulation Applications conference, Bolzano, Italy, February 2015.
I. Konstantzos, A. Tzempelikos, “Daylight Glare Probability Measurements in Offices with Dynamic Facades”, Proceedings of ASHRAE Winter Conference, Chicago, January 2015.
I. Konstantzos, A. Tzempelikos, “Daylight glare probability measurements and correlation with indoor illuminances in a full-scale office with dynamic shading controls”, Proceedings of 3rd High Performance Buildings conference at Purdue, July 2014 (Best Paper Award).
Y-C. Chan, A. Tzempelikos, B. Protzman, “Solar optical properties of roller shades: modeling approaches, measured results and impact on energy use and visual comfort”, Proceedings of 3rd High Performance Buildings conference at Purdue, July 2014.
Y-C. Chan, I. Konstantzos, A. Tzempelikos, “Annual Daylight Glare Evaluation for Typical Perimeter Offices: Simulation Models versus Full-Scale Experiments Including Shading Controls”, Proceedings of ASHRAE Annual conference, Seattle, June 2014.
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