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An external transparent porous pipe (made of
transparent insect-prevention screen mesh) has plants
growing in it with hot air from the home going
this net, cooling the air and sent back into the home.
The plants are selected to have the following
1. Plants that suck
humidity out of the air. Usually
desert plants that feed on salty water.
2. Plants that have dense and dark leaves, taking in
most of the light energy before it reaches the ground.
A second set of plants cover the net from above,
cooling it further.
Trees and global cooling
[pashute, Jul 20 2012]
||If it works it'd be a nice back end to an evaporation cooler.
||Drawing air from outside past plants for cooling is
baked. But I'm not aware of any way that plants can
both dehumidify and cool air. In both light and dark,
plants produce heat. This can only be offset by
transpiration, which increases humidity.
||if you put a drop of eucalyptus into a runny fan it
vaporizes it and your room will smell awesome for a
||On the hottest days (and in Israel we have quite a lot of
them) if you get out of your car and walk into the bush -
usually pine trees, in an an area where little or no sunlight
reaches, you'll need a sweater because its cold there, all
||I measured this time and again, around 17C.
||[spidermother], two things:
||Could you give a link to "drawing air past plants for cooling"?
||And about "both dehumidify and cool air": I suppose it
happens by evaporation from the plants then condensation on
the external parts (as what happens with the salty Tamarisk
tree), creating a dry and cool environment.
||What you are proposing is impossible from a
thermodynamic perspective. Without a way for disorder to
escape the system you are essentially proposing that these
plants can use light to cause a net decrease in entropy.
||^ Perhaps water evaporates from the ground (swamp cooling) and is absorbed by the trees.