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Siemens cycle

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Title: Siemens cycle  
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Siemens cycle

The Siemens cycle is a technique used to cool or liquefy gases.[1] A gas is compressed, leading to an increase in its temperature (by Gay-Lussac's law relating pressure and temperature). The compressed gas is then cooled by a heat exchanger, then the cool, compressed gas is allowed to decompress, further cooling it (again by Gay-Lussac's law). This results in a gas (or liquefied gas) that is colder than the original and at the same pressure.

Carl Wilhelm Siemens patented the Siemens cycle in 1857.[2][3]

See also


  1. ^ Adiabatic Expansion Cooling of Gases
  2. ^ Charles William Siemens, "Improvements in refrigerating and producing ice, and in apparatus or machinery for that purpose", British patent no. 2064 (filed: July 29, 1857).
  3. ^ The Siemens cycle
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