Supercritical carbon dioxide (SCO₂) Brayton cycle is widely known as highly potential bottoming cycle among energy conversion systems in the future due to its low requirement to heat source, high efficiency and small volume. Recently, SCO₂ Brayton cycle has been considered utilized in marine industry. In marine environment, unstable disturbance due to the oscillating condition driven by wind and waves makes an impact to on the dynamic performance of SCO₂ Brayton cycle. In this study, we proposed a novel type of compact heat exchanger coupled with phase change material (PCM) based on the concept of printed circuit heat exchanger (PCHE) as a transient controlling method in order to stabilize the dynamic performance of main compressor, re-compressor and turbine in the SCO₂ recompression Brayton cycle system. In this paper, dynamic modelling of the SCO₂ recompression Brayton cycle system with designed PCM based heat exchanger is developed and its dynamic performance is tested. The result of the transient simulation shows that with the effect of PCM based heat exchanger, the disturbing ranges of compression and expanding power of the main compressor, re-compressor and turbine decrease at most by 84%, 75%, and 95% respectively, and the disturbing range of efficiency is reduced by 94%. The PCM based heat exchangers are proved to have great effect on reducing disturbing amplitude of performance of turbo machineries and cycle parameters.

由于超临界二氧化碳（SCO ₂）的布雷顿热循环对热源的要求低，效率高且体积小，因此在能量转换系统中被公认为是未来潜在的高谷底循环。最近，已经考虑将SCO ₂布雷顿循环用于海洋工业。在海洋环境中，由于风浪驱动的振荡条件而产生的不稳定干扰会产生影响至SCO ₂布雷顿循环动力学性能的研究。在这项研究中，我们以印制电路换热器（PCHE）的概念为过渡控制方法，提出了一种新型的紧凑型换热器与相变材料（PCM）耦合，以稳定主压缩机的动态性能。 -SCO ₂再压缩布雷顿循环系统中的压缩机和涡轮。本文对SCO _2进行动态建模开发了基于PCM换热器的再压缩布雷顿循环系统，并测试了其动态性能。瞬态仿真结果表明，在基于PCM的换热器的作用下，主压缩机，再压缩机和涡轮的压缩和膨胀功率的扰动范围分别最多减少了84％，75％和95％，效率的影响范围减少了94％。事实证明，基于PCM的热交换器对降低涡轮机械性能的扰动幅度和循环参数具有很大的作用。