2. OUR WORK
IS NOT BASED ON ANY
PRE-CONCEIVED NOTION OF
ARCHITECTURE
• IT EVOLVES BASED
ON LAWS OF
NATURE
ARVIND KRISHAN
3. PERCEIVED SUN PATH
SUN PATH IS DYNAMIC & CURVILEANER WHY DO
WE DESIGN BUILDINGS AS CUBOIDS
?
4. SOLAR ENVELOPE
• Entire building envelope a : Solar Receptor, Converter, Dissipater
• SOLAR ENVELOPE
• SOLAR ENVELOPE CAN BE DESIGNED WITH COMPONENTS RESPONDING
TO :
Produce direct energy through PV.
Distribute day-light, within the building, creating a healthy day-lit
environment and in open spaces.
Create ventilation: Solar Chimneys
To cool or heat the building, when coupled with earth tunnels using the
thermal inertia of the earth and Trombe walls, in innovative approaches.
15. SOLAR CHIMNEY
Energy Efficiency of a Reference Thermosyphon Collector (Solar
Chimney)
TEMPERATURE RISE AND EFFICIENCY
SOLAR CHIMNEY – under +overflow
29. DOUBLE SKINNED BUILDING ENVELOPE
INTER-STITIAL SPACE
-HEAT BARRIER THROUGH INSULATION / DEAD AIR CAVITY
-MOISTURE BARRIER
-T.A.P. (THERMOSYPHON AIR PANEL)
- THROUGH SOLAR / MECHANICAL ACTIVATION
INSIDE
THERMAL INNER SKIN
INTERACTS WITH INTERNAL
CONDITIONS
-AIR TEMP.
-HUMIDITY
-LIGHT
OUTSIDE
STRUCTURAL OUTER SKIN
INTERACTS WITH
EXTERNAL CONDITIONS
-WEATHER
-RADIATION
-HUMIDITY
-AIR TEMP.
-U.V.
30. K14 CSP Case Study Project : Opriya Mohanty UNVERSITY OF NOTTINGHAM U.K.
Performance of downdraught evaporative cooling system in atrium and its neighboring
office space, (PEDA) building – Chandigarh, India.
Objective
An investigation into the contribution of PHDC system in
the atrium and its space conditioning systems to the
thermal comfort in their adjacent office spaces in the
Punjab Energy Development Agency building (PEDA).
Introduction
The Office complex building for PEDA at Chandigarh, India is
a project aimed at demonstrating an architectural design
developed in response to elements of nature : Sun, wind,
light and the utilization Of Solar Passive Systems.
Context & Site microclimatic analysis
Architectural building design needs to respond to the
composite climatic context of the site. The final design
solution needs to satisfy the diverse and often conflicting
conditions of a hot-dry, hot-humid, temperate and cold
period of Chandigarh.
The climatic periods : two months of hot-dry, hot-humid
(two months) and cold period (two months) require
strategies of design that allow for cooling in the hot dry
period, natural ventilation in the hot-humid period and
heating in the cold period. Cooling remains as the
predominant requirement since the total over-heated
period extends from mid-April to mid-August.
The comfort temperature varies during whole year, but the
maximum comfort temperature in summer varies from 29 c
to 31 c when external temperature varies from 40 c to 45c.
hence we need to design the building to achieve
comfortable temperature by keeping the highest or hottest
week of the year in mind to avoid the overheating inside
the space.
Psychometric chart
Temperature and rain fall variation
Average Insolation Summer
31. WIND SPEED AND DIRECTION
should be taken in to consideration while designing the wind
tower and building openings,
Architect has taken priority during placement of wind tower
as well as the openings for better movement of air flow
Over shadowing analysis
Building is not overshadowed by its surrounding building, due to its
orientatiion and well designed facades ,building is having its own
shadow during summer which helps to minimise the over heating.
Winter solstice
Equinox
Summer solstice
32. Shell roof in atrium space to minimize overheating and
uniform daylighting
Ventilation system in atrium and office space
through wind tower and solar chimney
during summer day and night
Daylight study in U. Ground office space
Simulation through PHDC air
flow tool
PASSIVE DOWN DRAFT INDIRECT+ DIRECT EVAPORATIVE
COOLING COUPLED WITH EARTH AIR TUNNEL UNDER THE
WATER BODY ( Architect’s design idea)
Results
The comfort temperature range varies from 24 to 31 during different seasons of the year. Comfort relative humidity range 30to 80 %. Required air flow rate as from manual calculations can be 3.5 m3/sec. so the air flow rate can be
achieved in all the cases. Required airflow rate is very low due to less occupancy and equipment gain. Good thermal mass of the building helps the building to perform in extreme conditions. Appropriate building design and orientation
having properly placed building elements reduced or minimize the solar gain in summer. Features like light Vault, Solar chimney, Hyperbolic parabolised atrium roof help to minimize the solar gain. Instead of designing indirect plus direct
evaporative cooling system proposed by the architect, PDEC system can be used to make the building favorable place to work. From the above results it can be concluded that the temperature, relative humidity and airflow rate increase
from case 1 to case 3 which leads to unsuccessful result. Hence the central atrium space in between neighboring offices is working properly having PDEC system with one tower and it would be the best option to work with. From all the
cases we can conclude that ground office space also getting an ambient temperature during summer.
Comparison study of different cases
Result - Hottest day 161
Conclusion
Evaporative cool towers work best with open floor plans that permit the air to circulate through out the building without any obstacles. From the TAS result it can be concluded that the atrium
space is working properly with application of PDEC system by getting 10-12°C lower than ambient temperature, which also helps to cool the neighboring south office space to maintain a
comfortable space to work. From all evidences Punjab energy development agency (PEDA) can be called as a passive solar complex. Overall the building performs well whole of the year except
the peak summer period which can be improved through the evaporative cooling system.Hence Without any major changes in building profile and structure ,we can rebuilt the existing wind
tower and solar chimneys by incorporating the PDEC system ,which can perform better during hot and dry summer days.
33. •Evaporative cooling towers work best with open floor plans that permit the air to
circulate through out the building without any obstacles.
•Good thermal mass of the building helps the building to perform in extreme
conditions. Appropriate building design and orientation having properly placed
building elements reduced or minimize the solar gain in summer.
•Elements like light Vault, Solar chimney, Hyperbolic parabolised atrium roof help
to minimize the solar gain.
•From the TAS result it can be concluded that the atrium space is working properly
with application of PDEC system by getting 10-12°C lower than ambient
temperature, which also helps to cool the neighboring south office space to
maintain a comfortable space to work.
• From all evidences Punjab Energy Development Agency (PEDA)
office building can be called as a passive solar complex. Overall the
building performs well whole of the year. Evaporative cooling is
required in May & June
CONCLUSIONS
34. 5 STAR
RATING 2010
BASED ON
ACTUAL PERFORMANCE
14 kwh /sq.m/per year
.
BUREAU OF
ENERGY EFFICIENCY
GOVT. OF INDIA
Most Energy Efficient Building
in the country
35. Tribune : May 2004
Tribune : Jan 2004 HRH Prince Charles Visit October 2010
Round table discussion
36.
37.
38. TO MY MIND
GOOD MEANINGFUL
ARCHITECTURE
EVOLVES AT MEETING POINT:
WHEN ART BECOMES SCIENCE AND SCIENCE
BECOMES ART
ARVIND KRISHAN
