Why was it necessary?• 1000 years ago, Guangzhou was a key port.• Guangzhou is hosting the Asian games so the city is getting multi billion make-over.• Reduce the amount of carbon dioxide emission by 40-45% by 2020 as compared with 2005.• Zero Emission Eco-friendly tower.• Sun and wind to make its own energy.
What was the idea?• Aero-dynamical structure.• High-performance.• Use wind energy to power.• 4 holes for wind turbines.• Double skin of hi-tech glass inbuilt with solar panel
Challenges• Typhoon.• Earthquake.• Building has to withstand natural forces.
Quality• Every steel piece is subject to test.• Pressure is applied and a computer records the strength of steel.• Ultra-sound test is used to detect cracks and flaws.
Construction• Nearly 8 tones of steel beams each.• Nuts and Bolts- To prevent from earthquakes.• Precision is very important to prevent errors.• 18000 steel pieces manufactured.• Steel pieces are curved by applying precise amount of force.
Basement• Footprint 3 times larger than actual building.• 30 m Deep-Basement can house 800 vehicles.• 10m Deep-Bedrock.• 4 steel mega-columns with smaller columns to support the building.• Concrete core.• Beams to make up the core wall.
Beams• Crane totally relies on the instructions from team mates.• Coordinate to place the beam in correct position.• Bolted and welded into position.• Release beam from the crane.
Challenge• Positioning becomes difficult due to the curved structure.• Double layer surveying.• Survey points on neighboring buildings.• Set of points in tower’s perimeter and edges.• Measure every piece that they install.
Hydraulic climbing Frame• Makes work twice as fast.• Climbing frame attached to each of the 4 columns.• Pour concrete much easily.• Vertical frame.• Mold to hold concrete.• Wooden platform.
Double skin glass facade• Breathable skin.• Regulate the temperature and radiation inside the building.• Two layers of glass with cavity in between.• Deflects much of the sun spectrum away.• Blocks more than 70% of heat.
Energy efficient lighting• Energy efficient lights bulbs in beams.• Curved ceiling panels reflects this light.• Natural light is also reflected.• 50% less fixtures.
Cooling system• Chilled radiant ceilings.• Run chilled water through metal ceiling panel.• Air required is nearly 25% of what is necessary in any other building.
Glass Panels• 80,000 square meter of glass• Typhoons can create problem.• Curved structure need to be water tight.• Tests are done to ensure it.
Wind current• Building faces the direction of wind.• Funnels through wind holes.• Vertical turbines.• Integrated within the building.• Reduce the pressure of wind.
PV panels• Photo-voltaic panels• Convert light energy into electricity.• REGEN drive- recycles up to 75% of elevator.• Captures energy when full life travels up or down and feed it back into building.
Fixing the panels• Sealing the window frames.• To prevent moisture from getting in.• Precision is very important.• Surveying is done to make sure panels are installed properly.
Steel arches• To be installed to form the dome.• Placed properly to make sure it is positioned properly.• Glass façade might break so it had to be done carefully.
Power source• 15 micro turbines• 3 Mega watts of energy during day.• Return excess power to grid during night.• Plan was dropped as returning power was not possible.
Reference• Refer the NATGEO video file sent to you for videos.• Wikipedia has a lot of information on this topic