passive cooling
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A.Alliance Design InternationalTRANSCRIPT
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Passive Cooling
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contentsbio-mimicry
passive downdraft evaporative coolingstep pool
jaalisalterable façade
deep water source coolingcurtain wall
“green” screen
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Bio-mimicry: The Termite Mound
•Utilises vents to circulate air
•Circulated air regulates temperature of mound
• E.g. Eastgate Centre, Harare
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How the “Termite Mound” works
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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
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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
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Jaalis (Jalis) aka perforated stone
• Traditional tiles that laced buildings
• Blocks sunlight but allows air to flow through
• Practical & Ornate
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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.
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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
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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.
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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
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“Green” Screen
• A House in Saitama, Japan
• Utilises a foliage of Climbing plants as shelter
• Plants acts as Perforated screen allowing air flow &
shading
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The End
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