Evaporative cooling / refrigeration could reduce food waste
By Hicbd
Wed Aug 12 2020 9:42 am
"A pot-in-pot refrigerator, clay pot cooler, or zeer is an evaporative cooling refrigeration device which does not use electricity. It uses a porous outer clay pot (lined with wet sand) containing an inner pot (which can be glazed to prevent penetration by the liquid) within which the food is placed. The evaporation of the outer liquid draws heat from the inner pot. The device can cool any substance, and requires only a flow of relatively dry air and a source of water."
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