[Gasification] Something Might be Wrong (OT??)

[rkurt at tadaust.org.au]

Tom Miles wrote:
> See:
> http://www.bioenergylists.org/en/abacool
>
> Tom
>
>   
Yes, but this doesn't work well in a humid tropical country. It needs 
low humidity otherwise the water doesn't evaporate very well.

We kept butter, in Summer, in such a device before we left Germany, for 
Australia. In Australia, of course, we drank cool water from Waterbags 
(made of canvas and kept wet on the outside, by the water within) which 
kept the water very cool in the hot arid climate. Every vehicle would 
have a couple of them mounted on the roo bars at the front, kept cool by 
the slipstream. We kept our food cool in a Coolgardie safe, which also 
worked on the principle of evaporative cooling. Evaporative air 
conditioners are also very popular here, in the dry areas. Don't work 
too well in the tropical areas, but.

Then there is the concept of a cool tower. You have a tall tower, with 
insulated walls and an air intake (possibly open to the prevailing wind 
direction) at the top. A fine spray of water cools the incoming air, 
which consequently falls down the tower, exiting at the bottom to cool 
the people underneath. Works best in arid places. Another concept, 
ditches dug down a hillside to the building, roofed over and planted 
with gardens that are kept watered. The air in them is cooled by the 
moist soil and falls down into the building.

All these evaporative coolers use very little energy, some of them none, 
others only a bit to move air through them or pump a little water.
Most of this technology was used by the Arabs in their desert areas. 
Buildings specially constructed, with cooling towers, fountains and 
gardens in strategic places in the building and so on.

Kurt
who hasn't seen a water bag in years, just electrical water coolers 
making extra cooling work for the building's electrical air conditioning 
systems.