Optimization of the supercritical CO2 power conversion system based on the net efficiency under conditions of the pulse-operated fusion power reactor DEMO

Entler, Slavomír; Syblík, Jan; Dostál, Václav; Štěpánek, Jan; Zácha, Pavel

doi:10.1016/j.applthermaleng.2021.116884

Cited by 9 publications

(1 citation statement)

References 24 publications

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“…Usage of helium leads to higher outlet temperature at which the indirect Brayton secondary cycle with sCO2 (sCO2 Brayton cycle) reaches relevant efficiency, and thus can be considered as an alternative to the well-known Rankine cycle [2]. Although the Rankine cycle in DEMO would provide higher efficiency than the sCO2 Brayton cycle [3], Brayton offers several advantages; such are a lower number of main components, less complexity, smaller size of turbomachinery, and thus lower initial cost [4] [5] [6]. The largest components of sCO2 Brayton circuits are heat exchangers (HE); either heaters, recuperators, or coolers.…”

Section: Introductionmentioning

confidence: 99%

1D Modelling of Printed Circuit Heat Exchanger for Demo Fusion Power Plant

Junek,

Štěpánek,

Jun

et al. 2023

Proceedings of the 10th International Conference on Fluid Flow, Heat and Mass Transfer (FFHMT 2023)

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The power conversion system will be an important part of the DEMO fusion power plants. One possible way to convert heat from a helium-cooled fusion reactor to electricity is by the Brayton cycle with supercritical carbon dioxide (sCO2) as a working fluid. This approach offers a smaller footprint and smaller initial cost of the system than the Rankine cycle does, mainly due to the small size of the turbomachinery and simplicity of the Brayton cycle. Heat exchangers (heaters, coolers, and recuperators) play a major role in the overall size and cost of the system. One of the most promising heat exchanger types for heaters and recuperators is printed circuit heat exchangers (PCHE). In this work, the size of PCHE between primary circuit and secondary circuit with sCO2 of the helium-cooled DEMO power plant is computed using Python script. Presented results show that overall volume of heaters for the DEMO strongly depends on channel geometry.

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