SHIMOGA KARNATAKA INDIA 1000 Person Naturally Ventilated Office

Transcription

1 SHIMOGA KARNATAKA INDIA 1000 Person Naturally Ventilated Office Chadwick 2013 CHADWICK INTERNATIONAL 2013 Slide 1

2 Our Brief Commissioned by Xchanging plc, a UK based global outsourcer with a large footprint in India our task was: To provide an economic office in Shimoga which would attract the talented youngsters coming out of universities and colleges in the region and, most importantly, would help retain them To make an office sufficient to accommodate up to 1000 staff initially and 2000 over a five year period To create a planform that is modern, open and interactive To take advantage of the tax breaks and other benefits arising from investment in the Special Economic Zone set up in Shimoga by the Karnataka government. To adopt low carbon best practice in the design of the building. CHADWICK INTERNATIONAL 2013 Slide 2

3 The Big Decision We needed a cheap building Aircon was the obvious big ticket item to lose as it typically accounts for 40% of capital cost and 25% of running cost We did not want to lose staff so the solution had to be clever to attract and retain clever staff We worked with Buro Happold to design a naturally ventilated deep plan building that not only supported modern interactive working practice but provided acceptable environmental conditions in a tropical monsoon climate Our combined concept building is being executed on the ground by Venkatramanan Associates, one of India s larger architectural practices CHADWICK INTERNATIONAL 2013 Slide 3

4 Our Approach First we modelled the spatial consequence of the organisation predicted to occupy the facility CHADWICK INTERNATIONAL 2013 Slide 4

5 Our Approach Next we developed the bookend plan form to concentrate all major services in the short ends of the plan as a solid wall CHADWICK INTERNATIONAL 2013 Slide 5

6 Our Approach We made a study model to look at third dimension and climatic implications with Buro Happold CHADWICK INTERNATIONAL 2013 Slide 6

7 Our Approach We oriented the building South East / North West to cut out all low angle sun but with facades into prevailing wind CHADWICK INTERNATIONAL 2013 Slide 7

8 Our Approach We made the atrium rise above the floors to act as a chimney with roof lights to extract the air by venturi effect in one direction and act as wind scoops in the other CHADWICK INTERNATIONAL 2013 Slide 8

9 Our Approach We shaded North and South elevations with vertical brise soleil that cuts out all direct sunlight and directs the prevailing winds through the building CHADWICK INTERNATIONAL 2013 Slide 9

10 Our Approach We omitted suspended floors and ceilings and had no soft finishes, all to promote high thermal mass CHADWICK INTERNATIONAL 2013 Slide 10

11 Our Approach We reduced heat gains by adopting a thin client IT regime CHADWICK INTERNATIONAL 2013 Slide 11

12 The Result Integrated design roof large wind-catchers which are orientated towards the wind the roof creates a pressure differential which draws fresh air in shading shading pattern is formed by the passage of the sun throughout the day and the year protects the facade from all direct solar impact facade optimised glazing area for maximum day lighting large vent areas allowing optimal natural ventilation structure mushroom capitals achieving widest spans and creating open space exposed concrete to use the positive effects of high thermal mass atrium two 15m wide floor plates north and south separated by an atrium which rises above them stack effect draws fresh air in and blows stale air out bookends the cores accommodate all services located to the east and west with solid elevations protection from low sun angles in the morning and evening site plan optimal orientation towards the sun and the prevailing winds green landscaping around the building avoids heat islands water features cool the air entering the building low vegetation north and south of the building higher vegetation on the east and west side guides the winds CHADWICK INTERNATIONAL 2013 Slide 12

13 The Result Integrated design CHADWICK INTERNATIONAL 2013 Slide 13

14 The Result Integrated Design CHADWICK INTERNATIONAL 2013 Slide 14

15 Interiors bridge atrium office communications hub CHADWICK INTERNATIONAL 2013 Slide 15

16 Finished September 2012 Atrium, Communications Hubs and Bridge. Sunlight filtered by polycarbonate CHADWICK INTERNATIONAL 2013 Slide 16

17 Finished September 2012 North South Looking down the southern sunscreens Looking down the northern sunscreens Note the angled screens directing the wind and the depth of the screen CHADWICK INTERNATIONAL 2013 Slide 17

18 Finished September 2012 Workspace cool. pleasant and naturally ventilated CHADWICK INTERNATIONAL 2013 Slide 18

19 Conclusions As a consequence of the integrated design process between architect and engineer this building is singular a modern deep plan interactive and environmentally friendly workplace in a challenging climate. The savings on capital and running cost of the building compared with an air conditioned equivalent are significant. We have received initial reaction that suggests good levels of occupant satisfaction and attendant high productivity. The optimum building design has been developed to achieve the best comfort levels for inhabitants possible. Temperatures can reach 40 Celsius in Shimoga and the building is designed to perform well passively in these conditions. It is now practically complete and occupied on the ground and first floors. Completion of second and roof is underway as is the landscaping. Final completion is expected by March CHADWICK INTERNATIONAL 2013 Slide 19

20 SHIMOGA KARNATAKA INDIA 1000 Person Naturally Ventilated Office Chadwick 2013 CHADWICK INTERNATIONAL 2013 Slide 20