The recompression supercritical carbon dioxide Brayton cycle (SCO₂-BC) has great potential for bottoming cycles among future energy conversion systems with comparatively high thermal efficiency. However, the recuperator type selections and optimal designs are a long-standing bottleneck of realizing maximum cycle efficiency and minimum cost. Reasonable collocation of recuperator types remains challenging. In this study, the thermodynamic–economic evaluation and optimization of recompression cycle were performed considering different recuperator types and designs. Printed circuit recuperator channel types include straight, zigzag, S-shaped, and airfoil fins. The design parameters include recuperator enthalpy efficiency and recompression fraction. The results indicate that low-temperature recuperator (LTR) with zigzag channel and high-temperature recuperator (HTR) with zigzag channel exhibit the best comprehensive cycle performance. The cycle thermal efficiency is more sensitive to the HTR enthalpy efficiency compared with the LTR. There is a local inflection point of the recompression fraction where the cycle efficiency is maximum and the exergy loss is minimum. The optimal solution of three-objective optimization considering efficiency, total cost, and exergy loss is more comprehensive than that of the two-objective optimization considering efficiency and cost. In the application of concentrated solar power, the annual carbon dioxide emission can be directly reduced by 0.43 Gt through this optimization improvement. The results of the current study offer a promising route to high-efficiency and low-cost applications of SCO₂-BC by rational selection of recuperator types and designs.

再压缩超临界二氧化碳布雷顿循环（SCO ₂ -BC）在未来具有较高热效率的能量转换系统中具有很大的底循环潜力。然而，换热器的选型和优化设计一直是实现最大循环效率和最小成本的瓶颈。换热器类型的合理搭配仍然具有挑战性。在这项研究中，考虑到不同的换热器类型和设计，对再压缩循环进行了热力学-经济评估和优化。印刷电路换热器通道类型包括直线型、之字形、S 形和翼型鳍片。设计参数包括换热器热函效率和再压缩分数。结果表明，锯齿形通道低温换热器（LTR）和锯齿形通道高温换热器（HTR）表现出最佳的综合循环性能。与 LTR 相比，循环热效率对 HTR 的焓效率更敏感。存在再压缩分数的局部拐点，其中循环效率最大且火用损失最小。考虑效率、总成本和㶲损失的三目标优化的最优解比考虑效率和成本的二目标优化更全面。在聚光太阳能应用中，每年通过本次优化改进，可直接减少二氧化碳排放量0.43 Gt。目前的研究结果为通过合理选择换热器类型和设计实现SCO _{2 -BC}的高效低成本应用提供了一条有前途的途径。