Issues Associated With Coupling Supercritical CO2 Power Cycles to Nuclear, Solar, & Fossil Fuel Heat Sources

by Gregory A. Johnson, PhD, PE & Michael McDowell
Hamilton Sundstrand, Energy Space & Defense -Rocketdyne

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In this paper, we examine the issues associated with coupling a Supercritical CO2 (SCCO2) power cycle to a sodium cooled liquid metal reactor (LMR), a pressurized water reactor (PWR), a high temperature gas cooled reactor (HTGR), a concentrated solar thermal plant (CSP), and fossil fueled (e.g. coal) plants. We also introduce our cascaded SCCO2 concept for coupling to high temperature difference heat sources such as HTGRs and CSPs. Further, we discuss the pros and cons of SCCO2 cycles with reheat. A comparison with steam Rankine cycles is made. We elaborate on our system modeling and evaluation. We give details regarding our turbomachinery design efforts to date. Finally, we present our envisioned plans for future development of this promising power cycle.