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The history of refrigeration

The history of refrigeration

Refrigeration is the action of creating cooling conditions by removing heat. It is used for preserving food by slowing bacteria growth.

  • Around 1000BC, the Chinese used to cut and store ice.
  • Five hundred years later, the Egyptians and Indians left earthenware pots out during cold nights to make ice.
  • In the 17th century, it was found that saltpeter dissolved in water creates cooling conditions.
  • In the 18th century, Europeans collected ice in winter, salted it, wrapped it in flannel, and stored it underground for months. Ice was even shipped around the world.
  • People also used cool cellars or placed goods underwater.
  • Others built ice boxes out of wood, lined with tin or zinc, and insulated with cork, sawdust, or seaweed, and filled with snow or ice.

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MORE IDEAS FROM THE SAME ARTICLE

Refrigerators today work by evaporating liquids.

  • 1720s. Scottish doctor William Cullen saw that evaporation had a cooling effect.
  • 1748. Cullen demonstrated his ideas by evaporating ethyl ether in a vacuum.
  • 1805. Oliver Evans designed a refrigeration machine that used v...

  • The first refrigerators contained flammable, toxic, and highly reactive liquids and gasses.
  • Most refrigerators use hydrofluorocarbons (HFCs), which are safer than Chlorofluorocarbons (CFCs). CFCs are known to be harmful to the ozone layer.
  • Refrigerators should be set at a ...

New technologies in refrigeration include solid-state refrigerators and refrigerators that use magnets.

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