Comparative energy and exergy analysis and optimisation study on the supercritical CO2 recompression power cycle

Gumus E., Başhan V.

International Journal Of Exergy, cilt.32, sa.2, ss.130-149, 2020 (SCI Expanded İndekslerine Giren Dergi)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 32 Konu: 2
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1504/ijex.2020.10030257
  • Dergi Adı: International Journal Of Exergy
  • Sayfa Sayıları: ss.130-149


The current study aims at optimisation and comparing the recuperative s-CO2 cycle with the re-compression s-CO2 cycle in case of changes in turbine and compressor isentropic efficiency and TITs. Below 317°C the TIT recuperated Brayton cycle (RBC) has a higher cycle efficiency than RCBC for the case where compressor efficiency is 75% and turbine efficiency is 80%. RBCs with having higher turbomachinery efficiencies (ηc = 85%, ηt = 90%) have higher cycle thermal efficiency than RCBCs with lower turbomachinery efficiencies (ηc = 75%, ηt = 80%). These results will remedy the gap in the literature on information for selecting the appropriate cycle for various purposes under certain thermodynamic inlet conditions.