Passive Cooling

contentsbio-mimicry

passive downdraft evaporative coolingstep pool

jaalisalterable façade

deep water source coolingcurtain wall

“green” screen

Bio-mimicry: The Termite Mound

•Utilises vents to circulate air

•Circulated air regulates temperature of mound

• E.g. Eastgate Centre, Harare

How the “Termite Mound” works

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

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

Jaalis (Jalis) aka perforated stone

• Traditional tiles that laced buildings

• Blocks sunlight but allows air to flow through

• Practical & Ornate

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.

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

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.

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

“Green” Screen

• A House in Saitama, Japan

• Utilises a foliage of Climbing plants as shelter

• Plants acts as Perforated screen allowing air flow &

shading

The End

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