The paper presents an efficiency analysis of two transcritical CO2 power cycles with regenerative heaters. For the proposed cycles, calculations of thermal efficiency are given for selected values of operating parameters. It was assumed that the highest working temperature and pressure are in the range from 600 to 700 °C and 40 to 50 MPa, respectively. The purpose of the calculations was optimization of the pressure and mass flows in the regenerative heaters to achieve maximum cycle efficiency. It follows that for the assumed upper CO2 parameters, efficiency of 51-54% can be reached, which is comparable to the efficiency of a supercritical advanced power cycle considered by Dostal.

JO - Archives of Thermodynamics L1 - http://journals.pan.pl/Content/94451/PDF/14_paper.pdf L2 - http://journals.pan.pl/Content/94451 IS - No 3 September EP - 217 KW - CO2 thermodynamic cycle KW - Near-critical region KW - Heat regeneration KW - Thermal efficiency ER - A1 - KwidziĆski, Roman A1 - Trela, Marian A1 - Butrymowicz, Dariusz PB - The Committee on Thermodynamics and Combustion of the Polish Academy of Sciences JF - Archives of Thermodynamics SP - 197 T1 - A study of transcritical carbon dioxide cycles with heat regeneration UR - http://journals.pan.pl/dlibra/docmetadata?id=94451 DOI - 10.2478/aoter-2013-0025