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Increasing the COP of heat pumps and refrigerators by vortex tube expansion.

Author(s) : KELLER J. U., GÖBEL M. U.

Summary

The isenthalpic expansion process of the working fluid in compression (and absorption) cycles can be replaced by an exothermic expansion in a so-called thermovalve. In this way the cooling capacity of the cycle can be increased by the amount of heat released additionally by this device to either a coolant or the environment. This can lead to an increase in the COP of a refrigerator process by 5% for R22 or R134a as working fluids, but 15% if CO2 is used.

Details

  • Original title: Increasing the COP of heat pumps and refrigerators by vortex tube expansion.
  • Record ID : 1998-0532
  • Languages: English
  • Source: Heat pumping technologies towards the next century: applications and markets. Proceedings of the 5th IEA Conference.
  • Publication date: 1996/09/22

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