Investigation of material degradation and coolant chemistry for sCO2 power cycles

sCO2 power cycles are characterized by the enhanced efficiency of thermal to electric power conversion and more compact turbine size compared with the steam power cycle. The organizations from Czech Republic take part the extensive research activities in this field. The research infrastructure including sCO2 experimental loop was constructed. The sCO2 coolant chemistry and material degradation are among the solved topics. The objectives are to identify impurities in sCO2 medium and propose the purification and purity control system. Another objective is to gain data of structural material degradation in sCO2 medium. First results concerning impurities and materials were obtained during laboratory tests and the 1000 h operation of the sCO2 loop. The most important of them are presented in the paper and also conference presentation.


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