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Enhancement of CO2 refrigeration cycle using an ejector: 1D analysis.

Author(s) : KSAYER E. B., CLODIC D.

Summary

An ejector expansion transcritical CO2 refrigeration cycle is proposed to improve the performance of the basic transcritical CO2 cycle by reducing the expansion process losses. A 1D analysis is carried out in order to investigate the ejector performance using supercritical CO2 as fluid. The entrained flow condition is analyzed assuming constant pressure mixing inside the constant area section of the ejector. A sensitivity study is performed to investigate the effect of inlet temperature and pressure on the cycle performance. The COP of the ejector expansion transcritical CO2 cycle can be improved by more than 15% compared to the conventional transcritical cycle for typical air conditioning operating conditions. A comparison between ejector refrigeration cycle using R-134a and CO2 as refrigerants shows a better performance for CO2 refrigerant.

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Details

  • Original title: Enhancement of CO2 refrigeration cycle using an ejector: 1D analysis.
  • Record ID : 2007-1937
  • Languages: English
  • Source: 2006 Purdue Conferences. 18th International Compressor Engineering Conference at Purdue & 11th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
  • Publication date: 2006/07/17

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