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The Coolgardie Safe is a low-tech refrigeration unit which uses the heat transfer which occurs during evaporation of water. It was named after the small mining town of Coolgardie in Western Australia. It was invented in the late 1890s because the weather was so hot. It was usually placed on a veranda where there was a breeze. The term low-technology is a description of those crafts and tools whose inception (typically) predates the Industrial Revolution. ... It has been suggested that Refrigerator be merged into this article or section. ... In thermal physics, heat transfer is the passage of thermal energy from a hot to a cold object. ... This article or section is in need of attention from an expert on the subject. ... Water is a chemical substance that is essential to all known forms of life. ... Coolgardie Town Hall Coolgardie (30°57′ S 121°09′ E) is a small town in the Australian state of Western Australia, 558 km east of the state capital, Perth. ... Emblems: Floral - Kangaroo Paw (Anigozanthos manglesii); Mammal - Numbat (Myrmecobius fasciatus); Bird - Black Swan (Cygnus atratus) Motto: none Slogan or Nickname: Wildflower State Other Australian states and territories Capital Perth Government Const. ... The 1890s were sometimes referred to as the Mauve Decade, because William Henry Perkins aniline dye allowed the widespread use of that colour in fashion, and also as the Gay Nineties, under the then-current usage of the word gay which referred simply to merriment and frivolity, with no... Weather is a term that encompasses phenomena in the atmosphere of a planet. ...
Principles of operation
The Coolgardie Safe was made of wire mesh, hessian, a wooden frame and it had a galvanised iron tray on top. The galvanised iron tray was filled with water. The hessian bag was hung over the side with one of the ends in the tray to soak up the water. Gradually the hessian bag would get wet. When a breeze came it would go through the wet bag and evaporate the water. This would cool the air and in turn cool the food stored in the safe.
We have to find a safe spot, where we can hide out until this is over.
SAFE, MY MATE: It is hard to trace the origin of this widely-used phrase, but the "mate" indicates an Australian connec-tion.
For example, if your mechanic says your car has been repaired and can be driven again, you can say "Safe, my mate." But it is not an appropriate response if your boss says your work is lousy and you are being watched.
This solves the dust problem, but if the safe is too small, this would make the temperature situation worse, because the limited available air would rapidly heat, without sufficient evaporative cooling effect.
Whether or not this solution works depends on how large the safe would need to be to counter this effect and provide a benefit.
We had a meat safe (Coolgardiesafe) like this when I was a kid, in inland Australia.
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