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Theoretical performance evaluation of a carbon dioxide based environmental control unit (ECU) with microchannel heat exchangers.

Author(s) : LI D., GROLL E. A.

Summary

A performance comparison study is reported in the paper based on the simulation results of a carbon dioxide based ECU and the experimental results of a standard R22 based ECU. The simulation of the carbon dioxide based ECU was performed using ACCO2, a computer code that simulates transcritical carbon dioxide based air conditioning and refrigeration systems, which was developed by the authors in earlier studies. The predictions of ACCO2 were validated using experimental results of a carbon dioxide based breadboard ECU system that was constructed and tested at the Ray W. Herrick Laboratories at Purdue University. The results indicate that the carbon dioxide based ECU demonstrates a higher cooling COP and a higher cooling capacity compared to the R22 based ECU. Both the cooling and heating performance of the carbon dioxide based ECU can meet the requirements for the next generation of ECU as stipulated by the US Army.

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Pages: 2004-2

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Details

  • Original title: Theoretical performance evaluation of a carbon dioxide based environmental control unit (ECU) with microchannel heat exchangers.
  • Record ID : 2005-2760
  • Languages: English
  • Source: Natural Working Fluids 2004: 6th IIR-Gustav Lorentzen Conference
  • Publication date: 2004/08/01

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