Coca Cola uses the sun to cool drinks
By Ben Coxworth
June 9, 2014
In the town of Aipir, Colombia, the temperature can often get as high as 45ºC (113ºF), yet few of the residents have a reliable source of electricity. So, pulling an ice-cold beverage out of the fridge isn't really an option. Coca Cola and the Leo Burnett Colombia advertising agency therefore devised a "Bio Cooler" for the town – it reportedly chills cans of Coke, without using electricity.
The cooler was developed in collaboration with the International Physics Centre in Bogota, and is described solely in a short video released by Leo Burnett. It reportedly works by two methods ...
First, a compartment in the top of the cooler contains plants and soil, while the cans of Coke sit in a chamber below. When the plants are watered and much of that water subsequently evaporates, it has a cooling effect on the chamber.
Second, a mirror in the cooler focuses heat from the sun, which is somehow used to convert an unnamed gas to a liquid state, creating a cooling effect as that liquid is circulated around the Coke chamber. This could conceivably be something like a thermal-powered version of the CryoEnergy System, in which energy is stored by converting ambient-temperature gaseous air into cold liquid air.
Whatever's going on, you can see the Coca Cola Bio Cooler in use, in the video below.