固体氧化物电解池系统布局优化设计与多工况性能研究

Study on the layout design and performances under various conditions of a solid oxide electrolysis cell system

中文关键词: 固体氧化物电解池  系统布局优化  换热  动态响应

英文关键词: SOEC  System Layout Optimization  Heat Exchange  Dynamic Response

中文摘要:

      固体氧化物电解池系统可与风、光等可再生能源结合，通过高效电解水制氢实现长时储能。许多学者对固体氧化物电解池系统进行了研究，但对于其系统布局的设计仍需更深入的认识。固体氧化物电解池系统包含固体氧化物电解池堆、预热器、换热器等辅助设备，其系统布局的设计应从热力学角度进行评估，并验证热集成的可行性和有效性。此外，还需要研究所设计系统对不同运行条件的敏感性，以及在稳态和动态等多种工况下的性能。本研究采用了品位拆分法设计固体氧化物电解池系统，从经济性、有效性和稳定性三个方面进行了分析，探讨了所设计系统运行参数的合理操作空间，关键参数对系统效率、能量利用率和电解池温度梯度等指标的影响，以及操作参数切换时的系统动态响应性能。本研究可为设计固体氧化物电解池系统提供理论支持，为选择操作参数提供依据，为系统运行时的操作点切换提供指导。

英文摘要:

      Solid oxide electrolysis cell (SOEC) systems can be combined with renewable energy sources such as wind and solar power to achieve long-term energy storage through efficient water electrolysis for hy-drogen production. Many scholars have conducted research on SOEC systems, but a deeper under-standing of the system layout design is still needed. The SOEC system includes components such as the solid oxide electrolyzer stack, preheaters, heat exchangers, and other auxiliary equipment. The design of the system layout should be assessed from a thermodynamic perspective and the feasibility and ef-fectiveness of thermal integration should be verified. Additionally, the sensitivity of the designed sys-tem to different operating conditions and its performance under various steady-state and dynamic con-ditions need to be studied. This study employed a quality splitting method to design the SOEC system and analyzed it from three aspects: economic viability, efficiency, and stability. The study explored the reasonable operating space of the system's operating parameters, the impact of key parameters on sys-tem efficiency, energy utilization rate, and the temperature gradient of the electrolyzer, as well as the system's dynamic response performance during the switch of operating parameters. This research can provide theoretical support for the design of SOEC systems, a basis for selecting operating parameters, and guidance for the switch of operating points during system operation.