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Passive cooling . Passive cooling . 1.Heat avoidance; Minimizing heat gain in the building 2. Passive cooling; lowering temperatures  mainly through ventilation 3. Mechanical cooling if not enough  Not passive . First avoid heat through:. First avoid heat through: Shading

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passive cooling1
Passive cooling

1.Heat avoidance; Minimizing heat gain in the building

2. Passive cooling; lowering temperatures  mainly through ventilation

3. Mechanical cooling if not enough

 Not passive

slide4

First avoid heat through:

  • Shading
  • Orientation
  • light colors
  • vegetation
  • insulated envelope
passive cooling2
Passive cooling
  • Passive cooling depends highly on the climate and it differs from one to another.
  • Hot and dry treatments:
  • Few & small windows.
  • Light surface colors
  • Massive construction (thick walls of adobe, brick or stone)
  • High ceilings
construction
Construction

Thick walls

Domes roof

slide7

Thick walls

Small openings

Deep Courtyards

Narrow alleys

Shaded areas

slide11

Hot and very humid climates treatment

  • Lightweight structures
  • Maximum ventilation
  • Shading
  • Minimize thermal mass
slide12

Light structures

Maximum ventilation

Shadings

Minimize thermal mass

Movable wall panels

Maximum ventilation

slide13

built of a raised light wood frame

tall openings to maximize ventilation very high ceiling

Deep shaded verandas

passive cooling3
Passive cooling
  • Passive cooling is achieved through :
  • Ventilation
  • Radiant cooling
  • Evaporative cooling
  • Earth cooling
1 passive ventilation
1-Passive ventilation
  • Ventilation:
  • Thermal mass thick and insulated
  • Operable windows opened at night & closed at day
passive ventilation
Passive Ventilation

Ventilation forms:

  • Wind scoops
slide25

Smart facades

  • The Commerzbank Headquarters Building in Frankfurt, Germany, designed by Foster and Partners
2 radiant cooling
2-Radiant cooling
  • Thermal mass  stores during the day

 emits during the night

Passive solar: collects heat during the day and warm the area at night

Passive cooling: get rid on heat at night and have cooler mornings through the use of insulation

(heat sink during the day)

3 evaporative cooling
3.Evaporative cooling
  • When water evaporates it draws heat out and temperatures drop

1.Direct evaporation

water for cooling
Water for cooling
  • contact between cool water and hot dry air produces evaporations and results in a heat loss to

surrounding areas.