Ray tracing study for non-imaging daylight collectors

Journal Article · Tue Jun 15 00:00:00 EDT 2010 · Solar Energy

DOI:https://doi.org/10.1016/J.SOLENER.2010.03.008· OSTI ID:21320554

Wittkopf, Stephen ^[1]; Oliver Grobe, Lars; Geisler-Moroder, David ^[1]; Compagnon, Raphael ^[2]; Kaempf, Jerome; Linhart, Friedrich; Scartezzini, Jean-Louis ^[3]

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1. Solar Energy Research Institute of Singapore (SERIS), National University of Singapore (NUS), 7 Engineering Drive 1, Block E3A, 06-01, Singapore 117574 (Singapore)
2. College of Engineering and Architecture of Fribourg (EIA-FR), University of Applied Sciences of Western Switzerland (HES-SO) (Switzerland)
3. Solar Energy and Building Physics Laboratory (LESO), Swiss Federal Institute of Technology Lausanne (EPFL) (Switzerland)

This paper presents a novel method to study how well non-imaging daylight collectors pipe diffuse daylight into long horizontal funnels for illuminating deep buildings. Forward ray tracing is used to derive luminous intensity distributions curves (LIDC) of such collectors centered in an arc-shaped light source representing daylight. New photometric characteristics such as 2D flux, angular spread and horizontal offset are introduced as a function of such LIDC. They are applied for quantifying and thus comparing different collector contours. (author)

• OSTI ID: 21320554
• Journal Information: Solar Energy, Vol. 84, Issue 6; Other Information: Elsevier Ltd. All rights reserved; ISSN 0038-092X
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
DAYLIGHTING
LIGHT SOURCES
DIAGRAMS
BUILDINGS
LIGHT TRANSMISSION
PERFORMANCE
PHOTOMETRY
LIGHT PIPIES
Non-imaging daylight collectors