PUNJAB ENERGY DEVELOPMENT AGENCY

OFFICE BUILDING

CHANDIGARH

OUR WORKIS NOT BASED ON ANY

PRE-CONCEIVED NOTION OF ARCHITECTURE

• IT EVOLVES BASED ON LAWS OF

NATURE

ARVIND KRISHAN

PERCEIVED SUN PATH

SUN PATH IS DYNAMIC & CURVILEANER WHY DO WE DESIGN BUILDINGS AS CUBOIDS

?

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.

PEDA Office Chandigarh

PEDA OFFICE CHANDIGARH

GROUND FLOOR PLAN

SECTION

PEDA Office

Building Envelope in response to Solar geometry and Renewable Energy Systems Integration

FLOORS FLOATING IN A LARGE VOLUME OF AIR

PEDA Office Chandigarh, India –

A New Language of Sustainable Architecture

PEDA Office

HYPERBOLIC PARABOLOID SHELL ROOF

HYPERBOLIC PARABOLOID&

PERCEIVED SUN-PATH

SOLAR CHIMNEY

Energy Efficiency of a Reference Thermosyphon Collector (Solar Chimney)

TEMPERATURE RISE AND EFFICIENCYSOLAR CHIMNEY – under +overflow

PEDA Office

Solar Shellsday light for working areas

During Construction

Office Layout

Architecture – Structure Symbiosis

SUN GENERATES ARCHITECTURE - PEDA Office

Day lit Working Environment

VISUAL CONTINUITY

Fascinating Architecture

WIND TOWER

BIPV

Restful Working Environment

PHOTOVOLTAIC AS INTEGERAL COMPONENT OF ROOF

BIPV & HYPERBOLIC PARABOLOID ROOF

TYPICAL CONNECTION

PHOTOVOLTAIC ROOF

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

OUTSIDESTRUCTURAL OUTER SKIN INTERACTS WITH EXTERNAL CONDITIONS

-WEATHER

-RADIATION

-HUMIDITY

-AIR TEMP.

-U.V.

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.

ObjectiveAn 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).

IntroductionThe 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 analysisArchitectural 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

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 analysisBuilding 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

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)

ResultsThe 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

ConclusionEvaporative 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.

•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

5 STARRATING 2010

BASED ON ACTUAL PERFORMANCE14 kwh /sq.m/per year

.BUREAU OF

ENERGY EFFICIENCYGOVT. OF INDIA

Most Energy Efficient Building in the country

Tribune : May 2004

Tribune : Jan 2004 HRH Prince Charles Visit October 2010

Round table discussion

TO MY MIND

GOOD MEANINGFUL ARCHITECTURE

EVOLVES AT MEETING POINT:WHEN ART BECOMES SCIENCE AND SCIENCE

BECOMES ART

ARVIND KRISHAN

AT THIS POINT

LOFTY BECOMES MUNDANE &

MUNDANE LOFTY

ARVIND KRISHAN