This study investigated the impact of well geometry and surface reflectance on the vertical daylight factors of walls in atria with square plan forms under a CIE standard overcast sky. Artificial sky scale model measurements were used to validate predicted values of vertical daylight factors using the software package Radiance. More simulated vertical daylight factors data for a much wider range of square atrium geometries and surface reflectances were then produced. From the results the variations of the vertical daylight factor on the walls of square atria were assessed and explained and some empirical functions derived. Some guidelines for supporting design are presented.
SaxonR. Atrium Buildings: Development and Design. London: The Architectural Press, 1983.
2.
BednarM. The New Atrium. New York: McGraw-Hill, 1986.
3.
HungWChowW. A review on architectural aspects of atrium buildings. Architectural Science Review2001; 44: 285–296.
4.
SharplesSLashD. Daylight in atrium buildings: A critical review. Architectural Science Review2007; 50: 301–312.
5.
AizlewoodM. The daylighting of atria: A critical review. ASHRAE Transactions1995; 101: 841–857.
6.
WrightJLethermanK. Illuminance in atria: Review of prediction methods. Lighting Research and Technology1998; 30: 1–10.
7.
OretskinBL. Studying the efficiency of light wells by means of models under artificial sky. Proceedings of 7th Passive Solar Conference. Knoxville, TX, 1982.
8.
KimKBoyerL. Development of daylight prediction methods for atrium design. Proceedings of the International Daylighting Conference. Long Beach, CA, 1986.
9.
BakerNFanchiottiASteemersK. Daylighting in Architecture: A European Reference Book. London: James and James, 1993.
10.
TregenzaP. Daylight attenuation in top-lit atria. Lighting Research and Technology1997; 29: 151–157.
11.
LittlefairP. Daylight prediction in atrium buildings. Solar Energy2002; 73: 105–109.
12.
LaouadiA. Design with SkyVision. A computer tool to predict daylighting performance of skylights. Toronto: CIB World Building Congress, 2004.
13.
LaouadiAAtifM. Daylight availability in top-lit atria: Prediction of skylight transmittance and daylight factor. Lighting Research and Technology2000; 32: 175–186.
14.
DuJSharplesS. Daylight in atrium buildings: Geometric shape and vertical sky components. Lighting Research and Technology2010; 42: 385–397.
15.
MardaljevicJ. Validation of a lighting simulation program under real sky conditions. Lighting Research and Technology1995; 27: 181–188.
16.
KhodulevABKopylovEA. Physically accurate lighting simulation in computer graphics software. In Proceedings of GraphiCon 96: 6th International Conference on Computer Graphics and Visualization. St. Petersburg: Russia, 1996.
17.
MardaljevicJ. The BRE-IDMP dataset: A new benchmark for the validation of illuminance prediction techniques. Lighting Research and Technology2001; 33: 117–134.
18.
ReinhartCFWalkenhorstO. Validation of dynamic radiance-based daylight simulation in a test office with external blinds. Energy and Buildings2001; 33: 683–697.
19.
LaouadiAReinhartCFBourgeoisD. Efficient calculation of daylight coefficients for rooms with dissimilar complex fenestration systems. Journal of Building Performance Simulation2008; 1: 3–15.
20.
AizlewoodMButtJIsaacKLittlefairP. Daylight in atria: A comparison of measurement, theory and simulation. Proceedings of Lux Europa. Amsterdam, 1997.
21.
CalcagniBParonciniM. Daylight factor prediction in atria building designs. Solar Energy2004; 76: 669–682.
22.
GalasiuAAtifM. Applicability of daylighting computer modelling in real case studies: Comparison between measured and simulated daylight availability and lighting consumption. Building and Environment2002; 37: 363–377.
23.
SamantSYangF. Daylighting in atria: The effect of atrium geometry and reflectance distribution. Lighting Research and Technology2007; 39: 147–157.
24.
LarsonGWShakespeareR. Rendering with Radiance: The Art and Science of Lighting Visualization. San Francisco, CA: Morgan Kaufmann Publishers, 1998.
25.
FontoynontMLaforguePMitancheyRAizlewoodMButtJCarrollWHitchockRErhornHDe BoerJDirksMöllerMMichelLPauleBScartezziniJ-LBodartMRoyG. IEA SHC Task 21: Validation of daylighting computer programs - ECBCS Annex 29. November 1999.
26.
SharplesSLashD. Reflectance distributions and vertical daylight illuminances in atria. Lighting Research and Technology2004; 36: 45–57.
