Optimization and thermodynamic analysis of supercritical CO2 Brayton recompression cycle for various small modular reactors

Joo Hyun Park, Hyun Sun Park, Jin Gyu Kwon, Tae Ho Kim and Moo Hwan Kim

Energy, 2018, vol. 160, issue C, 520-535

Abstract: This paper presents optimization of a supercritical carbon dioxide Brayton cycle for three types of 300-MWth small modular reactors (SMRs); a pressurized water reactor (PWR), a sodium-cooled fast reactor (SFR) and a high-temperature gas-cooled reactor (HTGR). The parameters of the pressure ratio and the flow split fraction were examined for sensitivity analysis and optimization of cycle. The optimized cycle efficiencies of PWR, SFR, and HTGR were 30.6%, 46.38%, and 50.04%, respectively. Key components, i.e. turbomachinery and heat exchangers for the SMRs were designed to develop the optimized cycles. The cycle thermal efficiency was improved by using investigating the effects of the channel shape (zigzag, s-shape, airfoil fin) of the printed circuit heat exchangers (PCHEs) on the pressure drop. The study indicated that using airfoil fin type PCHE may increase the cycle thermal efficiency by about 1.0% in comparison with zigzag type PCHE. The effect of turbomachinery efficiencies on the cycle thermal efficiency were investigated.

Keywords: Supercritical carbon dioxide (S-CO2); Brayton cycle; Cycle optimization; Small modular reactor (SMR); Printed circuit heat exchanger (PCHE); Turbomachinery (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (32)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:160:y:2018:i:c:p:520-535

DOI: 10.1016/j.energy.2018.06.155

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