Empowering the Built Environment with Human Centric Lighting
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1 Empowering the Built Environment with Human Centric Lighting Swissphotonics/SSSL Joint Workshop From Daylight to Lighting 4.0 Monday, November 6 th 2017 EMPA NEST, Dübendorf (Switzerland) Prof. Dr Jean-Louis Scartezzini Ali Motamed, Marta Benedetti Solar Energy and Building Physics Laboratory Ecole Polytechnique Fédérale de Lausanne
2 Self-Driving Car Advanced Autopilot Sensors Millimetric Wave Radar Ultrasonic Sensors Forward Looking Camera Extremetech.com
3 Recent Progress in Chronobiology
4 Circadian Rhythm External 24 hours Solar Light-Dark Cycle Internal Biological Clock in Humans Suprachiasmatic Nucleus Most stable Time Cue ( > 4 Billion Years) Approximately but not exactly 24 hours Swissphotonics/SSSL Joint Workshop, Nov. 6th 2017, EMPA NEST Dübendorf.
5 Human Eye System Visual & Non-Image Forming Photoreceptors Visual System Rods & Cones Non-Visual System Ganglion Cells Circadian Rhythm Sleep/Wake States Hormons Regulation Pupillary Reflex
6 Human Centric Sensing & Control High Dynamic Range Vision Sensor (IcyCAM/CSEM) 132dB Dynamic Range (Humans : 90dB) Fisheye Lens (135 x 110 ) 32-bit 500 MHz DSP Chip Photopic & Circadian Optical Filters Embedded Glare Rating (UGR, CGI, DGP) Luminance [cd/m 2 ] Photometry Relative Sensitivity (-) Spectrum V(λ) C(λ) Relative Response (-) Geometry
7 Human Centric Sensing & Control Embedded Discomfort Glare Rating Market Lab Edition (IcyCAM/CSEM) (VIP/CSEM) Glare Rating Luminance Mapping DGI Daylight Glare Index (1972) CGI CIE Glare Index (1982) UGR Unified Glare Rating (1992) DGP Daylight Glare Probability (2006) Glare Sources Mapping
8 Human Centric Sensing & Control Discomfort Glare Rating Empirical Validation Experimental Comparison with Evalglare Method (Wienold 2004) RMSE L AVE E v 0.9 % 8.9 % DGP DGI 2.5 % 6.7 %
9 Human Centric Lighting Integrated Sun Shadings & Lighting Control Platform Dimmable LED Lighting Motorized Roller Blinds A. Motamed et al., CISBAT 2015, Sep , Lausanne.
10 Human Centric Lighting In Situ Monitoring in LESO Experimental Building Mobile Textile Blinds and Dimmable LED Lighting (KNX/DALI) Two Monitoring Periods in LESO Office Room (Advanced Room) Comparison with Best-Practice Lighting Controller (Reference Room) Glare Rating Workplane Illuminance User Presence Illuminance Glare Solar Index Radiation Presence Shading Temperature Energy Sun Profile
11 Human Centric Lighting Short-Term Field Study (15 Days, 30 Subjects) Improvement of Visual Comfort & Performance at Workspace Overall 32% Lighting Electricity Savings (LPD AVE < 1.5 W/m 2 ) A. Motamed et al., Energy and Buildings 149, 2017.
12 Human Centric Lighting Long-Term Field Study (8 Months, 4 Subjects) Increase of Solar Gain during Wintertime (Lower Heating Load) Avoidance of Solar Gain during Summertime (Lower Cooling Load) Mitigation of Energy Performance Gap (70% vs. Standard Occupant) A. Motamed, PhD Thesis, EPFL, 2017.
13 Human Centric Lighting Integration of Non-Image Forming Effects of Light in Sun Shadings and Electric Lighting Control Dynamic Lighting Pattern M. Benedetti et al., CISBAT 2017, EPFL, Sep
14 Human Centric Lighting Human Building Interaction Energy Efficient Building Envelope NEST SolAce Unit Construction and Operation ( ) SCCER FEEB&D Phase II TechTransfer (Work/Living Space) Colored Solar PV Panels (SwissINSO) & Dynamic Glazing (BASF) Circadian LED Lighting (Regent, Griesser) & HDR Vision Sensors (CSEM) J.-L. Scartezzini et al., NEST Unit from EPFL Researchers SolAce Reconfort, 2015.
15 Conclusion Human-Centric Lighting based on HDR Vision Sensing & Control (Sun Shadings & Electric Lighting) Short-Term & Long-Term In Situ Monitoring in the LESO Office Building (Advanced & Reference Room) Field Studies with Human Subjects for Visual Comfort & Performance (Glare Rating, Acuity Tests, Global Surveys) Significant Savings of Electric Lighting & Back-up Heating Demand compared to Best Practice (COP 21, ES 2050) Mitigation of Glare Risks & Upturn of Office Lighting Conditions (Glare Index, Workplane Illuminance) Exciting Prospect for Human-Centric Lighting based on Circadian Lighting (Dynamic Lighting Pattern)
16 Any Question? Thank you For your Attention
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