Abstract

The next generation of Concentrated Solar Power (CSP) plants are expected to operate at higher temperatures than those currently in use, for improved efficiency and reduced cost of power generation. Degradation mechanisms that threaten structural alloys at elevated temperatures include thermal fatigue and creep as general threats to all sections of the system. In addition, specific degradation mechanisms caused by liquid sodium as the preferred heat transfer fluid material, eutectic salts or metals as Phase Change Material (PCM) in the storage and supercritical CO2 Brayton cycle in the generator threaten the plant. These threatening mechanisms have been discussed in this paper with some ideas for testing and evaluation specific to each condition.

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