Case study of Daylight Integration in Buildings

1. BSEE – Daylighting Integration
The West Bengal Pollution Control
Board building

2. Daylight Strategies Used
Orientation Shading

3. Orientation
Used orientation to be
a positive feature of
the adverse site.
Site was not suitable
in this respect, being
a long narrow plot
facing north-west
and south-east.
Conventional plan
would have exposed
large glazed areas to
south-east, north-west
and south-west,
resulting in the useless
glare of direct sunlight
and excessive heat
gain.
By effective
architectural design,
the key laboratories
and office spaces are
oriented north-south
for both daylighting,
good ventilation and
optimum thermal
condition

4. Figure: A typical floor plan showing the staggered plan form to
ensure maximum daylight and ventilation and minimum direct solar
gains

5. Shading
• The shading devices were designed specifically for different wall
orientations to control the glare and reduce the thermal load on the
building.
• For windows facing north, vertical louvers normal to the wall, capped by
horizontal members of the same width on top are adequate to provide
the required shading.
• Windows facing south were generally shaded with horizontal louvers.
Normally these horizontal louvers should extend much beyond the
window, possibly to other windows at the same level, to avoid sun light
coming partly from the corners.
• Hence, instead of extending the horizontal members to any distance
beyond the window on either side, two vertical louvers were provided at
the two extremes.

6. Shading
• For windows oriented east and west, the recommended shading device
is a combination of horizontal and vertical louvers. The horizontal louver
is normal to the wall but the vertical louver is inclined at 30º towards the
south, away from the normal to the wall.
• This has the advantage of letting in the winter sun during early mornings
on the east façade and of completely cutting off summer sun from
morning to evening.
• The shades are designed so that the summer sun is cut off and the
winter sun is allowed in. the compute simulations of the design also
proved the huge amount of energy saving by providing different kind of
shading devices

7. Figure : A view of the building showing north-oriented windows of
office space and laboratories.

8. Thank you.
Submitted by:
Karan Tibdewal
(UC1510 – Faculty of Technology)