Analyses and optimization for CFETR power conversion system with a new supercritical CO₂ Brayton cycle

Abstract In this paper, the Chinese Fusion Engineering Testing Reactor (CFETR) power conversion system, with a supercritical CO 2 (SCO ) Brayton cycle, is designed, analyzed and optimized. Considering pulse operation of reactor, heat storage loop high temperature molten salt low concrete introduced. Based on parameters first cooling loop, CFETR designed studied. A new SCO cycle for dual sources, blanket divertor, developed optimized using genetic algorithm. Compared to other simple recompression cycles, it shown that combines maximum thermal efficiency simplicity. Exergy analyses are carried out show exergy destruction rates turbine exchangers between different loops largest due large difference. The exergoeconomic fusion reactor accounts main cost, which key economy generation. following sensitivity hot has major influence system performance. Finally, several multi-criteria optimization algorithms introduced simultaneously optimize three fitness functions, efficiency, total product unit cost. It found lowest cost can be obtained almost optimal scheme presented.