A presentation on the sun and light control elements and it's usage for effective energy efficient architectural design.

1. Sun and Light Control
Elements in Windows
-Tanisha Agarwal
B.Arch/10003/14
Building Science II (Energy Efficient Buildings)
Semester VII (Monsoon 2017)
Birla Institute of Technology, Mesra

2. Structure
General Considerations for
Sun and Light Control
Sun Control
Combining Daylight
Redirection with Sun Control
• Size, shape, interface with the building
• Light control elements
• Glazing
• Room height/depth, partition, colours
• Shading with Vegetation
• Shading with Velarium
• Fixed Exterior Shading Devices
• Interior Shades and Blinds
• Motorized Shading
• Advanced Sun Control
• Reflectivity and Light Shelves
• Refraction and Prismatic Glazing
• Diffraction and Holographic Elements
• Double Envelope Facades

3. General Considerations for Sun
and Light Control
Architectural considerations in the building design

4. Design Considerations
Building Exteriors
• Interface of the Building
• Size
• Shape
Building Interiors
• Room Height/Depth
• Partition
• Colours
Source:
onlineexpo.com
sustainabilityworkshop.autodesk.com

5. External/Internal shading, Light Control
Elements
Overhangs
Louvres
Shades and Blinds
Light Shelves
Source:
inspectapedia.com
alibaba.com
blog.blindsaver.com
gordon-inc.com

6. Glazing
Source:
replacementwindowsofwoodbridge.com
Alibaba.com

8. Sun Control
Preventing overheating
Diffusing bright sunlight

9. Shading with Vegetation
Source: http://www.nzeb.in

10. Shading with Velarium
Source: http://www.bayscreens.net/History-of-the-Roman-Shade

11. Fixed Exterior Shading Devices
• Mutually shaded buildings (such as in Jaisalmer)
• Chajjas and Fins
Source: https://i.pinimg.com

12. Interior Shades and Blinds
Awnings
Drapes
Venetian
Blinds
Roller
Shades
Blackout
Screens
Sources:
classicwindowfinishings.com.au
houzz.com
aristocratawnings.com
shutterworld.com
ecosmartshades.com

13. Motorized Shading
• Motorized shades installed within a ventilated double layer glazed cavity to
work as part of the heat extraction system
• Relies on tubular motors mounted roller tube or head rail of the shade
Source:
http://shadesinplace.com

14. Source: http://www.sunseekerdoors.co.uk/news/integral-blinds-alternative-ideas-for-your-glass-doors/

15. Advanced Sun Control
• Adjustable sun control features
• Advantages:
• Optimized energy use
• Controlling interior conditions without relying on occupant

16. Combining Daylight Redirection
with Sun Control
Providing daylight and reducing heat gain at the same time

17. Reflectivity and Light Shelves
• Flat/curved elements in window façade that reflect incoming light, specifically
designed for each window orientation, room configuration, building latitude, and
climate.
• When light shelves are oriented vertically, they are known as baffles. They are used
with skylights or roof monitors to better distribute daylight and avoid glare.
Source:
https://sustainabilityworkshop.autodesk.c
om/buildings/redirecting-light

18. Refraction and Prismatic Glazing
• Horizontal prismatic ribs redirect light through refraction sending it
more deeply into the room.
Source: https://inhabitat.com/

19. Diffraction and Holographic Elements
• Holographic optical elements bend light by diffraction. Window is coated with a
transparent layer in which an invisible diffraction pattern is printed by holographic
technique. The window will then deflect direct and diffused solar radiation over a
defined angle, a function of holographic pattern and deep into the building.
Inside view of the library with sunlight
incident in the HOE’s ideal working angle
Source: http://www.energy.soton.ac.uk/holographical-optical-elements-hoe/

20. Double Envelope Facades
• The heat absorbed by the pane is released in the intermediate space which
is then drawn off through exterior skin by natural or mechanical
ventilation. Cooling load demands on mechanical plant are decreased with
this strategy.
Source: http://www.greenbuildingadvisor.com Source: https://www.researchgate.net/

21. Thank you!