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
• 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
• The Jara Mashrabiya Tile; uses hollow tiles
and water to regulate heat flow.
• Removable shading devices above the courtyards provide solar
protection in summer
• In winter the operation is reversed, opening during the day to capture solar
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-
• A project using this technology is about to break ground in Honolulu and
will use seawater.
• Architect Shigeru Ban‟s literal interpretation of the
architectural term “Curtain Wall”
• Movable curtains act as a „foldable‟ wall that provides shade &
• 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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