PUNJAB ENERGY DEVELOPMENT AGENCY BUILDING , CHANDIGARH

classroom presentation

1. PUNJAB ENERGY DEVELOPMENT AGENCY OFFICE BUILDING CHANDIGARH Prepared by :- MD . SIDDIQ SALIM III SEM - II YR B-arch PU , jaipur

2. 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:  

3. S ite :

4. 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:

5. PEDA Office Chandigarh

6. 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:

7. HYPERBOLIC PARABOLOID & PERCEIVED SUN-PATH

8. OUR WORK IS NOT BASED ON ANY PRE-CONCEIVED NOTION OF ARCHITECTURE IT EVOLVES BASED ON LAWS OF NATURE ~ARVIND KRISHAN ARCHITECT'S VIEWS

9. 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

10. GROUND FLOOR PLAN

11. ELEVATIONS

12. SECTIONAL PERSPECTIVE

13. SECTION

14. PEDA Office Building Envelope in response to Solar geometry and Renewable Energy Systems Integration

15. SOLAR CHIMNEY

16. SOLAR CHIMNEY Energy Efficiency of a Reference Thermosyphon Collector (Solar Chimney) TEMPERATURE RISE AND EFFICIENCY SOLAR CHIMNEY – under +overflow

17. LIGHT WELLS

18. PHOTO – VOLTAC PANELS T here 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. 

19. WIND TOWER

20. PEDA Office Chandigarh, India – A New Language of Sustainable Architecture

21. FLOORS FLOATING IN A LARGE VOLUME OF AIR

22. ELEMENTS OF BUILDING 1.WALLS 2.ROOF 3.SOLAR SHELLS 4.SHELL ROOFING 5. PHOTOVOLTAIC PANEL 6. WATER FOUNTAIN 7. WIND TOWER

23. 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.

24. 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.

25. 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

26. PEDA Office Solar Shells day light for working areas During Construction

27. Office Layout

28. 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. 

29. PEDA Office HYPERBOLIC PARABOLOID SHELL ROOF

30. 5. PHOTOVOLTAIC PANELS T here 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

31. 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.

32. 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

33. 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.

34. 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. 

35. WIND TOWER BIPV

36. Architecture – Structure Symbiosis ARCHITECTURE OF P.E.D.A OFFICE

37. SUN GENERATES ARCHITECTURE - PEDA Office

38. GIVES HARMONY

39. VISUAL CONTINUITY

40. Restful Working Environment

41. 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 ACHIEVEMENT :

42. 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

43. http://arvindkrishan/project-punjab-energy-development-agency-office-building-chandigarh http://arvindkrishan.com/?p=220 http://arvindkrishan.com/?p=220 Thank you !!! REFERENCES :