Discomfort Glare Evaluation using DIALux Lighting Simulation software and using developed Python Program model
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Abstract
Glare is a visual sensation caused by excessive brightness. It is subjective and person dependent. So, it is very difficult to measure glare factor accurately. Glare can be disabling or uncomfortable. Disability glare is the reduction in vision caused by bright light sources and it can be increased with the age of a person. Discomfort glare is a sensation of irritation due to bright light sources. There are various methods to evaluate discomfort glare. These methods are discussed in this paper.
This paper mainly focuses on two methods of discomfort glare evaluation; Unified Glare Rating (UGR) and Daylight Glare Probability (DGP). These glare factors are calculated by using DIALux lighting simulation software and by using developed program. The experimentation was carried out in two different spaces; Conference room and Optoelectronics laboratory. The values of UGR, daylight factor are calculated by using DIALux and developed program. The comparison of the results obtained is discussed at the end of this paper.
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Unified Glare Rating (UGR), Daylight Glare Probability (DGP), Daylight Glare Index (DGI).
2. IES Committee on Recommendations for Quality and Quantity of Illumination. Subcommittee on Direct Glare, “Outline of a standard procedure for computing visual comfort ratings for interior lighting: Report no. 2”, Illuminating Engineering, Vol. 61, No. 10, pp. 643-666 (1996).
3. IESNA, IES Lighting Handbook, 9th edition, Illuminating Engineering Society of North America, New York, USA (2000).
4. R.G. Hopkinson, “Evaluation of glare”, Illuminating Engineering, XII, pp. 305-316 (1957).
5. CIE, Publication No. 117, Discomfort glare in interior lighting, Commission Internationale de l’Eclairage, Wien, Austria (1995).
6. Hopkinson R. 1972. Glare from daylighting in buildings. Applied Ergonomics 3,4: 206-215.
7. J. Wienold and J. Christoffersen, “Evaluation methods and development of a new glare prediction model for daylight environments with the use of CCD cameras”, Energy and Buildings Vol. 38, No. 7, pp. 743-757 (2006).
8. Jakubiec, J.A., Reinhart, C.F. 2012. The 'adaptive zone' – A concept for assessing discomfort glare
throughout daylit spaces. Lighting Research & Technology 44 (2) 149-70.
9. Wienold, J. and Christoffersen, J., 2006. Evaluation methods and development of a new glare prediction model for daylight environments with the use of CCD cameras. Energy and Buildings, 38(7): 743-757.
10. Wienold J, Christoffersen J. Evaluation methods and development of a new glare prediction model for daylight environments with the use of CCD cameras. Energy and Buildings 2006; 38(7): 743-757.
11. CIE 117–1995. Discomfort glare in interior lighting, 1995. p. 2–5.
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