There’s nothing more pleasurable in this world than coming home after a warm day and serving up a glass of your favorite beverage with a few cubes of ice. For those born in the modern era, ice is born magically from the freezer or the nearest gas station.
The reality is that behind every ice cube there’s a tremendous investment of technology and engineering. The invention and manufacture of refrigerators, the electric motor, the condenser, refrigerated transport, and the energy that it takes to run all of the above to fruition.
What you could never have imagined is that the Persians, for more than 2,400 years, already made tons of ice and froze their food.
What was the secret of the Persians to make ice?
Although there was no electricity, thPersiansns invented the technology needed to obtain ice without any effort. They did not just produce ice for two or three drinks, they were able to create tons of ice, enough to freeze parts of a meal completely.
The Persians, in addition to being great warriors, they were a culture that was extremely rich and influential and they contributed their time to the best inventions of the moment. One of these inventions was the Yakhclal or ice pits.
This construction relies on evaporative cooling and has two elements clearly distinguished, the place of manufacture and the place of storage.
The Dome, storage place, is a dome that resembles the outside of bees hive whose base is buried to maintain temperature. The production area is located next to the Dome and consists of:
- A main wall oriented east to west.
- An aqueduct underground to flow south-north, poured water in a controlled manner, to 4 gutters.
- The three channels, between 40 and 50 cm depth, protected by a wall and a ceiling.
The whole complex was built with stones of great porosity, helping to maintain the temperature, and favored the freezing of the water.
How did this freezer work?
Taking advantage of the cold winter, the gutters were filled so that the water would freeze. Once frozen, they proceeded to the court and emptied the ice. This was stored in the part infer (buried) from the Dome.
The temperature of this zone was maintained with the flow of water through the stone walls of the cooler. This water was not wasted, it was used after for the cultivation of the fields.
Once the Yakhclal was full, the ice inside could handle it without problems until the next year. In the middle area of the Dome, they stored items that they wanted to keep fresh, such as cheese and fruit. The ice could also be removed to cool drinks in a palace for the more fortunate.
Building one of these was not cheap, so the possession of a Yakhclal became a symbol of status and power. The envy of the entire neighborhood.
If you want to fight with the programmed obsolescence of all appliances and products that you purchase, you can always build your own Dome.