PUNJAB ENERGY DEVELOPMENT AGENCY

OFFICE BUILDING

CHANDIGARH

Prepared by :- MD. SIDDIQ SALIMIII SEM - II YRB-archPU ,jaipur

Address : 33D, Sector 33, Chandigarh

Climate :  composite

operational schedule :– 15 hours, 6 working days in a week

Total Build-up area:  7000 sq. m

Function:  Office Building

Architect : Ar. Arvind Krishan

General Information: 

Site :

Designing sustainable buildings in a composite climate is a challenge. The techniques that are effective during summers do not work in winters. But a building in Chandigarh has achieved this. More than 10 years ago, the Punjab Energy Development Agency (PEDA) decided to construct an office building that utilises the movement of the sun for lighting, cooling and heating. 

The Rs 5.5 crore building, a pilot, was ready in 2004. Six years later, the Bureau of Energy Efficiency (BEE) awarded it a five-star rating, the highest grade of energy efficiency. Monuments like the Red Fort in Delhi were designed using these techniques. The PEDA office has an energy performance index (EPI) of 14 kWh/m2/year (the lowest in the country) in the category of non-air-conditioned buildings. 

According to the PEDA building’s architect, Arvind Krishan, unlike conventional buildings, the office’s design is in accordance with the external envelope, which he calls solar envelope. 

This envelope refers to the features and materials used in the building’s skin that makes it responsive to varying weather conditions. The internal structure has floating slabs which help in air circulation. The building is oriented in the north-south direction, minimising solar exposure on the western and eastern facades. Although a building’s southern facade can be shaded, the western façade remains exposed to the setting sun and cannot be shaded, he explains. 

A simulation-based study by the University of Nottingham in the UK says the PEDA building functions successfully as a passive solar complex.

About PEDA Office Building:

PEDA Office Chandigarh

Three dimensional configuration of the building evolved in response to solar geometry.

Elements of building i.e. building envelope, plan form etc. evolved in response to solar geometry.

Renewable energy systems i.e PV integrated in the roof as an element of design.

Project awarded ‘5 star project’ by Bureau of Energy Efficiency Govt. of India with EPI of 14.1 kwh/sq.m/year. The most energy efficient building in the country.

WHY THIS BUILDING:

HYPERBOLIC PARABOLOID & PERCEIVED SUN-PATH

OUR WORK IS NOT BASED ON ANY

PRE-CONCEIVED NOTION OF

ARCHITECTURE

IT EVOLVES BASED ON LAWS

OF NATURE

~ARVIND KRISHAN

ARCHITECT'S VIEWS

Entire building envelope a : Solar Receptor, Converter, Dissipater

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.

SOLAR ENVELOPE

GROUND FLOOR PLAN

ELEVATIONS

SECTIONAL PERSPECTIVE

SECTION

PEDA Office

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

SOLAR CHIMNEY

SOLAR CHIMNEY

Energy Efficiency of a Reference Thermosyphon Collector (Solar Chimney)

TEMPERATURE RISE AND EFFICIENCYSOLAR CHIMNEY – under +overflow

LIGHT WELLS

PHOTO – VOLTAC PANELS

There is an integrated 25 kWp solar photovoltaic plant in the building.More than half of the building’s electricity requirement is provided by the panels. The panels are placed on the roof of the atrium, in between two sheets of toughened glass. This helps filter daylight. 

WIND TOWER

PEDA Office Chandigarh, India –

A New Language of Sustainable Architecture

FLOORS FLOATING IN A LARGE VOLUME OF AIR

ELEMENTS OF BUILDING

1.WALLS 2.ROOF3.SOLAR SHELLS4.SHELL ROOFING

5. PHOTOVOLTAIC PANEL6. WATER FOUNTAIN 7. WIND TOWER

1. WALLS

They are made of two layers of bricks with a 5 cm air gap in between. In southern and western façades, insulation (consisting of 60 cm by 60 cm panels of 5 cm thick rock wool wrapped in polyurethane sheets) has been placed between the layers of bricks in addition to the air gap. This is done to reduce the amount of heat transferred from the outside to the inside through the walls. The combination of a brick wall with air gap reduces heat transfer by 50 per cent as compared to a conventional brick wall. If insulation is added along with the air gap, the heat transfer decreases by 85 per cent.

2. ROOF

As maximum heat gain is through the roof, a rockwool-and-polyurethane insulation at an air gap of 5 cm from the concrete slab has been placed. Top layer is made of mud phuska and brick tiles for further heat-proofing.

3. SOLAR SHELLS

These concrete domed structures on the southwestern façade are one of the well-recognised innovations of this project. The domes have horizontal and vertical intersecting fins with glass fixed in the voids. These voids allow natural light with reduced glare. The shading action of the fins allows indirect sunshine to enter the building in summers and direct sunshine in winters

PEDA Office

Solar Shellsday light for working

areas

During Construction

Office Layout

4. SHELL ROOFING

A portion of the roof of the atrium (open space in the centre of the building) is covered by a lightweight shell roofing. The roofing consists of 10 cm of high-density EPS (extruded polystyrene) sandwiched between high-grade FRP (fibre-reinforced plastic) sheets reinforced with steel. 

In summer the sun is almost overhead at noon while in winter it is at a lower angle. Keeping this in mind, the shell roof is angled in such a manner that the opening beneath the shell is shaded from the summer sun but allows the winter sun to penetrate. 

PEDA Office

HYPERBOLIC PARABOLOID SHELL ROOF

5. PHOTOVOLTAIC PANELS

There is an integrated 25 kWp solar photovoltaic plant in the building. More than half of the building’s electricity requirement is provided by the panels. The panels are placed on the roof of the atrium, in between two sheets of toughened glass. This helps filter daylight. 

PHOTOVOLTAIC AS INTEGERAL

COMPONENT OF ROOF BIPV & HYPERBOLIC PARABOLOID ROOF

DAYLIGHTING

Sunlight entering through solar shells, shell roofing, glass-integrated photovoltaic panels and windows made of unplasticised PVC meets the building’s lighting requirement, including that of the basement.

Fascinating Architecture

6. WATER FOUNTAIN

These are operational during hot and dry months (April to June) and help decrease the interior temperature through direct evaporative cooling

Day lit Working Environment

DAYLIGHTING

Sunlight entering through solar shells, shell roofing, glass-integrated photovoltaic panels and windows made of unplasticised PVC meets the building’s lighting requirement, including that of the basement.

VENTILATION

The wind tower (7) is expected to function as a non-mechanical air-conditioning system, but the mechanical component for the tower (ambiator) is yet to be installed. It will soon be installed, say PEDA officials. The ambiator uses the method of indirect evaporative cooling in which water cools the air without coming into contact with it. This method works well in humid conditions, says Darshi Dhaliwal, responsible for devising the ambiator. Currently, the tower is used to expel hot air from within the building. 

Fresh air rushes in from the openings in the envelope, passes over the floor and escapes through the tower top. Due to the building’s expanse and workstation panels (8), this flow is inadequate to maintain thermal comfort. So, coolers have been installed. 

WIND TOWER

BIPV

Architecture – Structure Symbiosis

ARCHITECTURE OF P.E.D.A OFFICE

SUN GENERATES ARCHITECTURE - PEDA Office

GIVES HARMONY

VISUAL CONTINUITY

Restful Working Environment

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

ACHIEVEMENT :

•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

http://arvindkrishan/project-punjab-energy-development-agency-office-building-chandigarh

http://arvindkrishan.com/?p=220

http://arvindkrishan.com/?p=220

Thank you !!!

REFERENCES :