This document summarizes a presentation on daylighting in buildings and its effects on human circadian rhythms and health. It discusses various daylighting design tools and technologies, including anidolic daylighting systems that can provide significant increases in daylight provision. Experimental findings show that daylight exposure in an office with anidolic systems can provide higher circadian efficacy than artificial light, due to daylight's spectral composition and dynamics. Optimizing light quality and exposure for circadian functions may require considering aspects of building science, physiology, and individual human factors. Further research is needed to better understand light's short and long-term impacts on human health and performance.
1. Light beyond Vision: Day and Night in Building Science and Chronobiology Light beyond Vision: Day and Night in Building Science and Chronobiology Prof. Jean-Louis Scartezzini, Dr. Mirjam Münch Solar Energy and Building Physics Laboratory Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne (Switzerland)
2. INTRODUCTION Daylighting in Office Buildings (Natural Luminary, Prismatic Panels) Jourda et Perraudin (Lyon/France) Bartenbach Lichtlabor (Dorbirn/Austria)
11. DAYLIGHTING RESOURCES AND PROVISION Impact on DL Systems Performance (Task Illuminance, Daylight Factor) Marin County Civic Center (F. L. Wright, 1969) ZEB Forum Chriesbach (B. Gysin, 2006)
12. CIE Overcast CIE Clear DAYLIGHTING DESIGN & ANALYSIS TOOLS Simulations of Sky Luminance Distributions (CIE Standard Skies) Isotropic
23. 0.75 0.75 0.16 Reflection Factors ANIDOLIC DAYLIGHTING SYSTEMS (ADS) Comparison of Daylighting Performance (1:1 Scale Office Rooms) 0.57 0.30 0.11 Double Glazing – Dark Room Anidolic System Double Glazing – Light Room
24. ANIDOLIC DAYLIGHTING SYSTEMS (ADS) Monitoring of Daylighting Performance (Daylight Factor) 50 % ANNUAL INCREASE OF DAYLIGHTING PROVISION (300 Lux / Urban) DF 3%
25. ANIDOLIC DAYLIGHTING SYSTEMS (ADS) Anidolic Zenithal Collector LESO-PB/EPFL, Lausanne (Switzerland) Scartezzini and Courret, SEJ 73(2), 2002. LESO Sustainable Building (EPFL Campus)
26. ANIDOLIC DAYLIGHTING SYSTEMS (ADS) Anidolic Integrated Ceiling (Movable Test Modules) Architectural Design: Müller & Ganz, Geneva
27. ANIDOLIC DAYLIGHTING SYSTEMS (ADS) Monitoring of Daylighting Performance (Anidolic Integrated Ceiling) DF 9% DF 4%
28. Optimal Integration ANIDOLIC DAYLIGHTING SYSTEMS (ADS) Facade Integrated Anidolic System (Movable Test Modules) Architectural Design : I. Giaccari, Lausanne
29. ANIDOLIC DAYLIGHTING SYSTEMS (ADS) Anidolic Integrated Ceiling (Zero Energy Building, Singapore) Building Construction Authority, Singapore
42. Internal Biological Clock in Humans Suprachiasmatic Nucleus Approximately but not exact 24-h hours External 24-h Solar Light-Dark Cycle source:www.solardemocenter.com/main.html Most stable time cue (>4 billion years) SwissNex Lecture, San Francisco, February 16th, 2010
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44. -dian (lat. dies) = dayDaily Synchronization of Rhythms by Light For example: melatonin secretion by the pineal gland during the night Slide Courtesy Centre for Chronobiology, Basel SwissNex Lecture, San Francisco,February 16th, 2010
49. gene expressionSwissNex Lecture, San Francisco February 16th, 2010 Intrinsically Photosensitive Receptors in the Retinal Ganglion Cells (ipRGC) Light ipRGC Rods, cones adapted from:www.webvision.med. utah.edu
50. Melanopsin SwissNex Lecture, San Francisco February 16th, 2010 Non-Visual Effects are conveyed via the Photopigment Melanopsin Brainard et al. 2001 ->physiological, behavioral responses are wavelength-dependent -> the effects are blue-shifted: peak sensitivity around 460 nm -> photopigment is different from those of rods and cones