Off-grid refrigeration using reusable salts (no electricity)

This is seriously cool (ha!). Had to share.

Adding specific salts to water causes a cooling effect that can last 10-12 hours in an insulated container. The salt can then be recovered and reused using a heat source to boil off the water.  

Excerpts:

Three teenagers designed a mini refrigerator that cools itself with salt and doesn't require an outlet. They're bringing it to hospitals to help transport medical supplies to rural areas without electricity.

The trio says they found that ammonium chloride maintained temperatures of around 2 to 6 degrees Celsius (about 35 to 43 degrees Fahrenheit), which is ideal for many vaccines. Adding barium hydroxide octahydrate to the mix produced subzero Celsius temperatures, which is ideal for some other vaccines and sometimes for transplant organs.

https://ca.news.yahoo.com/3-teens-invented-salt-powered-202355199.html

A great morning read, thanks for the bump up Douglas.
We all see myriad complaints about younger generations, how they lack the work ethic or tenacity of Boomers, ad infinitum.  However, we older folks would be well advised to look for the silver linings.  This article is but one example of the creativity and technical ability of GenZ.  I have observed young adults in fine form during my 27 years of teaching; optimism is my overarching emotion

While this was developed for a specific application (medications), I am intrigued by the possibility of adapting this into a mini-fridge for a homestead. All it needs is a solar dehydrator or wood stove to recover the salt.