Solar energy is an endless source of renewable energy, so solar-powered S-CO2 cycle power generation systems have received much attention from scholars. In this research, a new S-CO2 cycle layout based on a recompression cycle and an intercooling cycle is proposed, and the thermal performance of the three layouts is compared and analyzed. Percentage exergy loss of each component in the system is obtained by conventional exergy analysis and further advanced exergy analysis is used to explore the enhancement possibilities of each component and their interactions. The investigation results revealed that the recompression cycle, intercooling cycle and combined cycle had respective evaluations of 38.45 %, 39.775 and 42.05 % efficiency. Sensitivity analysis revealed that the provided cycle has superior efficiency at higher turbine inlet parameters. The conventional exergy analysis and advanced exergy analysis yielded a combined cycle HE1 exergy loss of 8.27 MW and an avoidable exergy loss of 4.70 MW, with a high potential for improvement. This study provides directions for the structural optimization of solar-driven S-CO2 cycle power generation systems.

中文翻译：

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新型太阳能 S-CO2 循环的能量、用能和高级用能分析以及不同布局的系统比较


太阳能是取之不尽的可再生能源，因此太阳能 S-CO2 循环发电系统受到了学者们的广泛关注。本研究提出了一种基于再压缩循环和中间冷却循环的新型 S-CO2 循环布局，并对三种布局的热性能进行了比较和分析。系统中每个组件的用能损失百分比是通过常规用能分析获得的，并进一步使用高级用能分析来探索每个组件及其相互作用的增强可能性。调查结果表明，再压缩循环、中间冷却循环和联合循环的效率分别为 38.45 %、39.775 和 42.05 %。敏感性分析表明，提供的循环在较高的涡轮机入口参数下具有更高的效率。常规用能分析和高级用能分析得出联合循环 HE1 用能损失为 8.27 MW，可避免用能损失为 4.70 MW，具有很高的改进潜力。本研究为太阳能驱动的 S-CO2 循环发电系统的结构优化提供了方向。