The integration of compact and high-efficient supercritical CO2 (sCO2) power blocks has been identified as one of the key alternatives for enhancing the economic viability, and the flexibility of Concentrating Solar Power (CSP) plants. The present work aims at identifying and selecting the most promising CSP plant configurations that can be integrated with sCO2 power blocks. Several sCO2 – CSP layouts are identified, classified by the receiver heat transfer fluid and storage design, and benchmarked through a methodology developed by the authors. An analytical approach, based on purposely defined techno-economic criteria, is defined to benchmark each layout with an overall score. The following criteria are considered: maturity, low-cost potential, maximum temperature, safety, and system complexity. The overall score is then derived by combining the mentioned criteria and weighting factors. A comparative analysis is proposed, in which the higher the resulting overall score, the more attractive the layout was deemed. The CSP layout employing molten salts results in being the most attractive one, standing out for its maturity. The air- or particle-based configurations combined with packed beds or particle silos as storage are promising for their low-cost potential and high operating temperatures.
QC 20241023