lec21 - Advanced Lighting Strategies Strategy at the...

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Unformatted text preview: Advanced Lighting Strategies Strategy at the buildings design level Atrium Skylights Light guiding Advanced fenestration technologies General principle Without shading With external shading Ideal situation with light deflection Figures by MIT OCW. Window, facade Solar energy gains Additional heating Optimized g-values Good daylight illumination Conservation of energy for artificial lighting Improved comfort Improved health Heat protection in summer Reduced cooling load Optimized g-values Glare protection Illumination of room depths Optimized Solar energy daylight Heat protection in winter Reduced heating load Optimized U-values t Theoretical angular selective glazing could achieve: 18% annual cooling energy reduction 15% annual electricity use reduction relative to spectrally selective glazing Advanced fenestration technologies Advanced fenestration technologies Classification of CFS with shading diffuse daylight Prismatic panels ( 4.5) Prisms and venetian blinds All climates All climates Vertical windows Sun protecting mirror elements Anidolic zenithal opening ( 4.12, 4.13) Temperate climates Temperate climates Temperate climates Vertical windows, skylights Directional selective shading system with concentrating Holographic Optical Element (HOE) ( 4.11) Skylights, glazed roofs Skylights Temperate climates Vertical windows, skylights, glazed roofs Vertical windows, skylights, glazed roofs Transparent shading system with HOE based on total reflection ( 4.11) a 60 Figures by MIT OCW. Advanced fenestration technologies Classification of CFS with shading diffuse daylight Prismatic panels ( 4.5) Prisms and venetian blinds All climates All climates Vertical windows Sun protecting mirror elements Anidolic zenithal opening ( 4.12, 4.13) Temperate climates Temperate climates Temperate climates Vertical windows, skylights Directional selective shading system with concentrating Holographic Optical Element (HOE) ( 4.11) Skylights, glazed roofs Skylights Temperate climates Vertical windows, skylights, glazed roofs Vertical windows, skylights, glazed roofs Transparent shading system with HOE based on total reflection ( 4.11) a 60 Window Glass Diffuse Skylight Direct Sunlight Prism for Solar Protection Blades for Redirection Reflected Daylight Transmitted Daylight (Perforation) Figures by MIT OCW. Advanced fenestration technologies...
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lec21 - Advanced Lighting Strategies Strategy at the...

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