Economic Multipliers (119)
Do you know what these are?
They help CREATE wealth in systems.
Understanding a simple concept about cooling could be an economic multiplier for the world (Example 3).
In Example 1 (Economic Multipliers 116), I noted that ordinary table salt (NaCl) can steal heat. In Example 2 (Economic Multipliers 117), I noted that evaporative cooling using porous vessels (like unglazed clay pots) could help create coolth.
The combination of those two concepts has extraordinary potential in areas with salt water, a fair amount of sunlight and limited humidity.
Another concept is worth adding to this: Damp material (imagine a cotton pillow case surrounding an item (perhaps a glazed or metal pot filled with fruits or vegetables) and tied off to keep insects out) can also help create coolth:
Evaporation must occur for the cooling to take place.
Preferably the material will have a steady source of dampness: Material can ‘wick up’ and can also ‘wick down.’
Preferably the evaporative rate can be enhanced (perhaps by a solar powered fan).
If you increased the evaporation rate by using a solar powered fan, that does not mean that you’d want the item to be placed in the sun: Shade alone provides a significant temperature advantage.
When you’re trying to create ‘coolth,’ you want every advantage you can get.
P.S. Any time you think about food and water, you must also think about sanitation. Even if water is not clean, it has the capacity as it evaporates to cool.
If clean water is scarce and unpotable water is used for cooling, it’s important to set up a design whereby it is easy to access any food without touching the water. Likewise, you don’t want any food that would be eaten uncooked to come into contact with the unpotable water.
If you had an enamel (non-porous) pot with a lid, it would be possible to set up a system whereby the wick (bottom fed) only came in contact with the pot.
If insects and animals are a problem, cloth and elevated/hanging systems have been used for centuries to protect food supplies.
The Nature of Observation: Two Saltwater/Wicking Experiments … a mini eBook with a short photo log of some simple wicking experiments …