Share

Impact of oil solubility and refrigerant flashing on the performance of transcritical CO2 vapor compression systems with oil flooding and regeneration.

Number: pap. n. R23, 2148

Author(s) : BELL I., GROLL E. A., BRAUN J. E., et al.

Summary

Flooding the compressor of a vapour compression system with oil can allow for a more isothermal compression process. This can lead to significant improvements in performance, particularly when combined with a regenerative heat exchanger. For CO2 cycles with supercritical heat rejection, the superheat horn and throttle are major sources of irreversibility. The combination of flooding and regeneration attacks both of these losses with a relatively small impact on system costs. The improvement in system COP can be over 20% for sink and source temperatures of 30 °C and -30 °C, respectively, with an optimized oil mass fraction and oils that have low refrigerant solubility. However, when some amount of refrigerant is solved in the oil, the cooling capacity is decreased. At a refrigerant solubility of 20% by mass in the oil for fixed oil mass fraction, there is no improvement in system COP compared to the baseline system.

Available documents

Format PDF

Pages: 8 p.

Available

  • Public price

    20 €

  • Member price*

    15 €

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Impact of oil solubility and refrigerant flashing on the performance of transcritical CO2 vapor compression systems with oil flooding and regeneration.
  • Record ID : 30000980
  • Languages: English
  • Source: 2010 Purdue Conferences. 13th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2010/07/12

Links


See other articles from the proceedings (121)
See the conference proceedings

Indexing