Refrigeration

1948 refrigerator advertisement

Refrigeration refers to the process of removing heat from an enclosed space or substance for the purpose of lowering the temperature. Refrigeration can be considered an artificial, or human-made, cooling method. In the process energy, in the form of heat, is removed from a low-temperature medium and transferred to a high-temperature medium. This work of energy transfer is traditionally driven by mechanical means, but can also be driven by heat, magnetism, electricity, laser, or other means. Refrigeration has many applications, including household refrigerators, industrial freezers, cryogenics, and air conditioning. Heat pumps may use the heat output of the refrigeration process, and also may be designed to be reversible, but are otherwise similar to air conditioning units.

See also

• Canning
• Evaporative cooler
• Food preservation
• Pot-in-pot refrigerator

References

This article uses material from the Wikipedia article Refrigeration, which is released under the Creative Commons Attribution-ShareAlike 3.0 Unported License (view authors).