Effect of thermodynamic parameters on energy characteristics of СО2 power cycles during oxygen combustion of methane
S.V. Alekseenko1, P.A. Shchinnikov2, I.S. Sadkin1,2
1Kutateladze Institute of Thermophysics SB RA, Novosibirsk, Russia
2Novosibirsk State Technical University, Novosibirsk, Russia
Keywords: carbon dioxide power cycles, CO cycle, supercritical carbon dioxide, decarbonization, zero emissions
Abstract
Four options for the power cycle using carbon dioxide as a working fluid during oxygen combustion of gaseous fuel are considered. In all the cases, heat is supplied in the zone of supercritical parameters of CO2. The fundamental difference in options lies in the method of increasing the working fluid pressure. The heat is supplied to the cycle in the combustion chamber, and the cycle operation is accompanied by continuous updating of the working fluid, since part of CO2 and all steam obtained during fuel combustion are removed from the cycle. It is shown that cycles with a single-stage pump pressure increase have the highest thermal efficiency, reaching 64.5%. The effect of thermodynamic parameters on the energy characteristics of cycles has been estimated quantitatively.
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