#evaporation cooling

[perikali]

Ancient Structures Used to Make Ice in the Persian Desert

Yakhchāls were created in around 400 BC to fill the great need for year-round ice.

An ancient ice factory in the Persian desert just by the method of evaporation cooling.

“The extremely thick waterproof and heat resistant walls were made of a special mixture of sand, clay, egg whites, lime, goat hair, and ash called sarooj”