The document discusses various bio-mimetic and passive cooling techniques for buildings, including termite mounds, passive downdraft evaporative cooling, step pools, jaalis, alterable facades, deep water source cooling, curtain walls, and green screens. It provides examples of each technique and explains how they work to naturally regulate indoor temperatures through air circulation, evaporative cooling, and shading.

2. contents
bio-mimicry
passive downdraft evaporative cooling
step pool
jaalis
alterable façade
deep water source cooling
curtain wall
“green” screen

3. Bio-mimicry: The Termite Mound
• Utilises vents to circulate air
• Circulated air regulates temperature of mound
• E.g. Eastgate Centre, Harare

4. How the “Termite Mound” works

5. Passive Downdraft Evaporative Cooling
(aka Wind Catching)
• Uses water bodies within building & chimneys that capture wind
• Captured wind passes over cooled structures for cooling
• The wind is then circulated around the building to regulate heat

6. Step Pool
(aka Baolis)
• Centralised pool in the courtyard of the building
• Evaporation of water for Heat removal
• E.g. Pearl Academy of Fashion by Morphogenesis

7. Jaalis (Jalis) aka perforated stone
• Traditional tiles that laced buildings
• Blocks sunlight but allows air to flow through
• Practical & Ornate

8. Modern Applications of Jaalis
• E.g. Pearl Academy of Fashion by
Morphogenesis
• The Jara Mashrabiya Tile; uses hollow tiles
and water to regulate heat flow.

9. Alterable Facade
• Removable shading devices above the courtyards provide solar
protection in summer
• In winter the operation is reversed, opening during the day to capture solar
gains

10. Deep Water Source Cooling
• Toronto: Cool water is pumped from a 5 km depth in Lake
Ontario to participating office buildings and through metal coils.
• Fans blow the cool air from the coils into the buildings‟ climate-
control systems
• A project using this technology is about to break ground in Honolulu and
will use seawater.

11. Curtain Wall
• Architect Shigeru Ban‟s literal interpretation of the
architectural term “Curtain Wall”
• Movable curtains act as a „foldable‟ wall that provides shade &
ingenious architecture

12. “Green” Screen
• A House in Saitama, Japan
• Utilises a foliage of Climbing plants as shelter
• Plants acts as Perforated screen allowing air flow & shading

13. The End
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