|Air temperature feels colder combined with exposure to wind.|
|For example, a bottle of water placed outside at 4ºC, exposed to the wind |
will cool to the ambient temperature quicker than the same bottle placed in a fridge at 4ºC
(even with the fridge door closed).
|The wind chill table demonstrates how quickly the energy can be stripped from|
a heat-producing object
|This is because heat is stripped away more quickly from an object subjected to wind.|
|Buildings in exposed locations (top row above) will feel wind chill more than |
buildings in sheltered locations or less exposed surface area (bottom row).
Fortunately the wind chill effect is subject to conditions which can be influenced by building design. This could save up to 20% of energy used for heating.
|Adding an additional skin to the building can create a zone 20 to 200cm where air can be |
tempered and controlled to reduce the wind chill effect.
Landscaping and trees can reduce the the exposure of a building to the wind (left)
Adding a secondary skin to the building can create a controlled environmental space reducing wind chill exposure (right)
Building in to the ground, under a green roof or next to water etc. (left)
Or building a mega roof such as Buckminster Fuller's project for Manhattan (right)
|Using a green roof and green living wall reduces wind chill (left)|
Using an external wall to shield the building also helps (right)
Some of the many ways building design can be articulated to minimise the affects of wind chill.