A passive cooling system developed at MIT relies on evaporation and radiation and requires no electricity. The device can provide up to about 19 degrees Fahrenheit (9.3 degrees Celsius) of cooling from the ambient temperature, to help keep food fresh longer or supplement air conditioning.
System provides cooling with no electricity, MIT News
How an MIT researcher's zero-electricity cooling system could reduce food shortages - Interesting Engineering
This technology could alter the entire planet. These groups want every nation to have a say.
System provides cooling with no electricity
Energy efficient design and implementation of electric machines in
Energy storage technologies: An integrated survey of developments, global economical/environmental effects, optimal scheduling model, and sustainable adaption policies - ScienceDirect
Buildings, Free Full-Text
New MIT passive cooling system works without electricity
New MIT passive cooling system works without electricity
Going off grid: Tata researchers tackle rural electrification, MIT News
Cheap, Off-Grid Cooling
Passive cooling system could benefit off-grid locations
New MIT system could cool buildings up to 10℃— without electricity
How an MIT researcher's zero-electricity cooling system could reduce food shortages - Interesting Engineering