Performance of a new scanning sky simulator

Abstract

A new type of sky simulator has been developed,using a scanning process, to build up the complete sky hemisphere, starting from a sixth of the whole hemisphere. This novel apparatus possesses numerous advantages when compared to other simulators. It can reproduce any sky luminance distribution, from theoretical CIE models to statistical skies, i.e. International Daylight Monitoring Programme (IDMP) measurements. A detailed analysis of experimental errors has shown, that the relative average discrepancy between the simulated skies and their corresponding models, varies from 1.5% to 3%. This device allows quantitative (daylight factors) and qualitative analysis (video imaging) of daylighting system performance. The operation, performance and experimental results of this sky simulator are described in this paper.

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References

Daylight Publication 16 (E-3.2) (Paris: Commission Internationale de l'Eclairage) (1970)

Moon P. and Spencer D.

Illumination from a nonuniform sky

Illuminating Eng. 37(12) 707-726 (1942)

Hopkinson R.G. et al. Daylighting (London: Heinemann) (1966)

Chauvel P. , Garcia M. and Brebion H. Etude sur maquette eclaire en ciel artificiel Publication EN-ECL 85.11C (Nantes: CSTB) (1985)

Schiler M. Simulating daylight with architectural models (Los Angeles, CA: Daylighting Network of North America, University of Southern California) (1989)

Tregenza P R.

Guide to recommended practice of daylight measurement - general class stations CIE

J. Suppl. 6(2) (1987)

Scartezzini J-L. , Michel L. , Roecker C. and Rhyner R. Laboratoire de Lumière Naturelle Projet OFEN (Lausanne : EPFL) (1994)

Berger M. Les placements de cercles, Pour la Science 176 72-79 (juin 1992)

Tregenza P R.

Subdivision of the sky hemisphere for luminance measurements Lighting

Res. Technol. 19(1) 13-14 (1987)

10.

Ward G J. The Radiance 2.1 synthetic imaging system (Berkeley, CA: Lawrence Berkeley Laboratory (May 1992)

11.

Michel L. , Compagnon R. and Scartezzini J-L. Diagnostic in-situ du confort visuel au moyen d'un systeme video CUEPE/LESO-PB Proc. du 7. Energieforschung im Hochbau Status-Seminar, 17/18 sept. 92, ETZ- Zurich (1992)

12.

Compagnon R. , Scartezzini J-L. and Paule B. Application of nonimaging optics to the development of new daylighting systems Proc. ISES Solar World Congress, Budapest, Hungary (1993)

13.

Conipagnon R. Simulations numériques de systèmes d'éclairage naturel a pénétration latérale These de Doctorat, Departement d'Architecture, EPFL (1993)

14.

Winston R. Nonimaging optics for illumination SPIE vol. 692 Materials and Optics for Solar Energy Conversion and Advanced Lighting Technology (1986)

15.

Standardization of luminance distribution on clear skies

Publication 22 (TC-4.2) (Paris: Commission Internationale de l'Eclairage) (1973)

16.

Matsuura K. Luminance distributions of various reference skies CIE technical report of TC 3.09 (Paris: Commission Internationale de l'Eclairage) (1987)

17.

Molineaux B. , Ineichen P. and Guisan O. Mesures d'éclairage à Geneve (GAP/ CUEPE, Universite de Geneve) (1993 )

18.

Tuchschmid E. and Mathis W. Etudes sous maquettes effectuees sous ciel artificiel Schweiz. Technische Zeitschr. 38/39 44-50 (29 Sept 1966)

19.

'ADELINE' brochure, descriptif sommaire International Energy Agency: SHC Task 12, CUEPE, Universite de Geneve (1992)

20.

Szerman M.

Kunstlicher Himmel-Quantifizierbare Tageslichtplanung im Entwurfsstadium

IBP Mitteilung 174 16 (1989)

21.

Ward J.G. Adaptive shadow testing for ray tracing Proc. Second Eurographics Workshop on Rendering, Barcelona, Spain ( 1991)

22.

1994

IESNA Survey of illuminance and luminance meters

Lighting Des. Applic. 24(6) 31-42 (June 1994)

23.

Tregenza P R.

Daylight measurement in models: new type of equipement

Lighting Res. Technol. 21(4) 193-194 (1989)