A review on integrated design and off-design operation of solar power tower system with S-CO2 Brayton cycle

The solar power tower (SPT) system integrated with supercritical CO2 (S-CO2) Brayton cycle is a po-tential flexible power output station to balance supply and demand in the future power system with high renewable energy penetration, so as to maintain the reliability of power supply. Reasonable design and accurate parameter adjustment are crucial to the efficient, low-cost, and reliable operation of the SPT system with S-CO2 Brayton cycle. Many works have studied the design optimization and operation control strategy of the system. But the research focuses and conclusions are various, and there is a lack of important summary in this field. This paper provides a review on the integrated design and off-design operation of SPT system with S-CO2 Brayton cycle. In terms of system integrated design, the performance criteria, subsystem selections, and key parameter optimizations are summarized. Furthermore, an improved system design method based on off-design operating performance is introduced and recommended. In terms of system off-design operation, the fluctuating factors, parameter control strategies, and the actual operation results are introduced. The conclusions and study prospects for this promising technology in the aspects of design and operation are presented. (C)& nbsp;2022 Elsevier Ltd. All rights reserved.