Thermodynamic analysis of two-stage transcritical CO2 cycle using flash gas by-pass

ÖZGÜR A. E., Tosun C.

International Journal of Exergy, vol.16, no.2, pp.127-138, 2015 (SCI-Expanded, Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 16 Issue: 2
  • Publication Date: 2015
  • Doi Number: 10.1504/ijex.2015.068215
  • Journal Name: International Journal of Exergy
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.127-138
  • Keywords: CO2, Flash-gas by-pass, Thermodynamic analysis, Transcritical cycle, Two-stage
  • Isparta University of Applied Sciences Affiliated: No

Abstract

In this study, the thermodynamic analysis of a two-stage transcritical CO2 cycle using flash gas by-pass is presented. The gas cooler pressure, the inter-stage pressure and the evaporation temperature of CO2 are selected as variable parameters. The cooling performance and exergetic efficiency variations of the cycle are graphically presented with these parameters. A comparison is presented between the flash gas by-pass two-stage transcritical cycle and the conventional two-stage transcritical cycle and the optimum operating parameters of the cycles are discussed. The importance of flash gas by-pass application is presented for energy and exergy efficiency improvement of two-stage transcritical CO2 cycles.