Mathematical Modeling
Vol. 9 (2025), Issue 1, pg(s) 15-18

MATHEMATICAL MODELLING OF TECHNOLOGICAL PROCESSES AND SYSTEMS

Isentropic and exergy analyses of turbomachines from co2 supercritical power plant

  • 1 Faculty of Engineering, University of Rijeka, Croatia
  • 2 Faculty of Informatics, Juraj Dobrila University of Pula, Croatia

Abstract

The results of three turbomachines (one turbocompressor and two turbines) isentropic and exergy analyses, which operate in supercritical CO2 power plant are presented in this paper. Both observed turbines (Turbine 1 and Turbine 2) have higher improvement potential than Turbocompressor. Mechanical losses in power transmission between Turbine 1 and Turbocompressor are equal to 456.57 kW in real operation process. Turbocompressor has the highest isentropic efficiency of 96.87% and the highest exergy efficiency of 97.61% if all observed turbomachines are considered. Turbine 2 used for the electric generator drive has higher efficiencies (both isentropic and exergy) in comparison to Turbine 1, regardless of higher isentropic loss and higher exergy destruction. Increase in the ambient temperature from 5 °C up to 45 °C decreases Turbocompressor exergy efficiency for 0.31%, while the same ambient temperature increase decreases exergy efficiency of both turbines for 0.53% (Turbine 1) and for 0.52% (Turbine 2).

Keywords

References

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