sun shading devices

1. SUN SHADING DEVICES
SUBMITTED TO – TAPTI MA’AM
SUBMITTED BY – ESHA SINGH BAGHEL
SEMESTER – 7TH B.ARCHITECTURE

2. INTRODUCTION
• Sun Shading Devices inhibit the solar radiation (block, allow,, etc.)
incident on a building and are used either internally or externally
or in between the internal and the external building space.
• The primary objective of creating a comfortable internal
environment, that is, cool in the summer and warm in the winter.
• They can be any mechanical equipment (like dynamic facades),
projections (chajja), cantilevers, louvres, fins, jaalis, or even
textiles.
• They can be fixed, manual and automatic moveable.

3. NEED OF SUN SHADING
• To reduce the heat gains during summer, reduce the cooling loads and therefore minimize energy costs.
• Solar control is particularly important on south to west-facing facades, since the solar gains will coincide
with the hottest part of the day.
• Internal sun shading devices like curtains help to beautify internal space and create a sense of privacy.
TYPES OF SUN SHADING DEVICES -
• Internal
• External
• Interplane

4. INTERNAL SUN SHADING DEVICE
• Usually are adjustable and allow occupants to regulate the amount of direct light entering their
space.
• Limit the glare resulting from solar radiation.
• Internal shading devices should be made or designed to be durable.
CURTAINS -
• It is the most commonly used shading device, mostly used on residential
buildings.
• It is cheaper in comparison and can be found in various varieties, colours
and texture.
• A curtain also acts as a decorative item.

5. VENETIAN BLIND -
• Venetian blinds are basic slatted blinds made of metal or
plastic, wood or bamboo can also be used.
• Suspended by a strip of cloth called tapes, all slats in unison
can be rotated through nearly 180 degrees. Slat width can be
between 16 and 120 mm, with 25 mm being a common width.
VERTICAL LOUVRE BLINDS -
• Suitable for many applications in commercial and public
buildings where the control of heat, light and glare are of
concern.
• It can be used in larger windows and doors too.
VENETIAN BLIND ROLLING BLINDS
VERTICAL LOUVRE
BLINDS
BLACKOUT BLINDS

6. EXTERNAL SUN SHADING DEVICE
• Most thermally efficient as it controls the amount of radiation entering the building externally.
• Horizontal, Vertical or egg-crate devices.
• Vegetation and other buildings can also act as shading devices.
HORIZONTAL DEVICE
• To shade a window during hot summer months, but to allow sunlight to shine
through a window in the winter, to help warm a building.
VERTICAL DEVICE
• Primarily useful for east and west exposures to improve the insulation
value of glass in winter months by acting as a windbreak.

7. EGG – CRATE
• A combination of vertical and horizontal shading elements commonly used in hot
climate regions because of their high shading efficiencies.
• The horizontal elements control ground glare from reflected solar rays.
• The device works well on walls.
OUR DEVICE SHOULD BE SUCH THAT -
1. It reduces glare.
2. It reduces cooling load.
3. It allows us to see the view that we like to watch.
4. For doing presentations, complete shut off of lights is possible.
5. There is limited reduction daylight.

8. ADVANTAGES OF SUN SHADING
• Maintain a comfortable indoor temperature.
• Shading is a simple method to block the sun before it can get into the building.
• Shading minimizes the incident solar radiation and cool the building effectively and
hence dramatically affect building energy performance.
• Reduce building peak heat gain and cooling requirements and improve the natural
lighting quality of building interiors.
• Peak electricity demand is also reduced by exterior shading devices, resulting in
lower peak demand charges from utilities and reduced mechanical equipment costs.
• Trees when used as shading devices can beautify landscape and provide oxygen.
Internal Shading devices also help to create a sense of privacy.

9. DISADVANTAGES OF SUN SHADING
• Difficulties can be experienced in handling the internal shading devices like
curtains and blinds.
• In the use of shading devices like light shelves, problems with low angle winter
sunlight penetration can give rise to glare.
• Shading always blocks a part of the view. It blocks the portion of the sky where
the sun travels.
• Some shading methods are extremely specific to compass orientation.