Cooling of something hot is typically handle means of lesson at ambient temperature, for instance a fan cooling of computer devices.

In which temperatures in the image below that of any available natural cooling agent come compulsory, icebox come utilized to create a expected cooling burden by ingesting heat at coldness & rejecting it at temperatures somewhat above that of the natural cooling professional, which is usually a river or even air. a work of the refrigerant machine, so, is to absorb heat at the sale temperature & reject it at a higher of these, applying external energy to cause the run. The icebox is profits the heat pump, a heat engine running in reverse. These are besides conceivable to apply eutectic salts.

Thermodynamics of refrigerators

Virtually all personal & self-propelled icebox qualify when phase change heat pumps. It convert the refrigerant from gas to liquid and back agawithin by compression in the refrigeration cycle. In theory, any endothermic process could be utilized provided these are balanced by an exothermic within another physical location so that it potty work in the period. E.g., absorption of gaseous ammonia into water is used within virtually all gas absorption refrigerators, and a Einstein refrigerator is a version of this which contains no moving area — a cooling burden therein instance from either a heat absorbed per ammonia when it evaporates from a a river.

More processes which develop been utilized in a little shell include the Peltier effect for thermoelectric cooling.

History of refrigeration

Ice houses Making of ice cream Refrigeration by well water

Development of the first refrigerators

Numerous countries might claim to exist when the house of a artificer of the icebox, as the technology was developed on top a period a lot on top the world utilizing different types of technology & for different purposes. Claimants to the title of artificer include Oliver Evans (USA), Jacob Perkins (USA & England), John Gorrie (USA), Alexander Catlin Twining (USA), James Harrison and Thomas Mort (Australia) and Carl von Linde (Germany). One of a 1st utilizes of "home" refrigeration was at Biltmore Estate in Asheville, North Carolina, USA, installed around 1895 [http://www.biltmore.com], while around commercial refrigeration a Vestey Brothers opened one of the number 1 refrigerated cold places within London the same month.

the flatulency absorption icebox, which cools per apply of a source of heat, was invented in Sweden by Baltzar von Platen in 1922. [http://otal.umd.edu/~vg/amst205.F97/vj09/project5.html] It was late made by Electrolux and Servel. Now these are utilized within homes that are non attached to the electrical grid, and within recreational vehicles.

Technology

Chlorofluorocarbons (CFCs) (Freon) Liquefied gases Heat pump Heat pipe Thermoelectric cooling Sonic refrigeration Magnetic refrigeration

Culture and commerce

Refrigerated transport

Refrigerated trucks (or even just icebox) come utilized to transfer perishable goods, like, for example, frozen nutrients, fruit & vegetables, & temperature-sensitive chemical substance. Virtually all modern icebox keep temperature -40...+20 °C & have a maximal payload of around 2 dozen 000 kilogram. gross weight (around Europe). Amazingly, refrigerated trucks come virtually all cherished around wintertime, whilst there is a important require to transportation chemical substance under comparatively high (+10...+20 °C) temperature. Food hygiene Quick meals Cook/chill Ice cream vans Air conditioning HVAC

Science
approaching absolute zero Cryogenics and cryocoolers Superconductivity Superfluidity

Speculative uses of refrigeration
Cryonics