There is historic proof that hundreds of years ago, the ancient Persians had already found a way to store ice in the middle of the dessert and in the middle of summer.Strange!
Let's take a look.
How did they do it?
The ancient Persians Yakhchal, ("ice pit"; yakh meaning "ice" and chal meaning "pit") is an ancient type of evaporative cooler. Above ground, the structure had a domed shape, it was often used to store ice, but as well as used to store some food.How did they get the ice?
well, one way was to actually get ice from the icy river in the winter and store it. A more common and, also, a very smart way was to use the wall made on the north side of the yakhchal. The water channeled along the wall would freeze faster on a winter day thus producing more ice.
After produce the ice was stored in yakhchals — specially designed for store ice, naturally cooled refrigerators. A large underground space with thick insulated walls was connected to a qanat, and a system of wind catchers or wind towers was used to draw cool subterranean air up from the qanat to maintain temperatures inside the space at low levels, even during hot summer days. As a result, the ice melted slowly and was available year-round.
So making and storing ice was actually first introduced as early as 400 BCE by the ancient Persians. Even today, Iranians still call the modern fridges and freezers “yakhchals”.
See images below.
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| Image Credit Flickr User reibai |
Image Credit Flickr User reibai
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| Image Credit Flickr User reibai |
Source | en.wikipedia
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