Abstract In this paper, the chemical looping hydrogen generation (CLHG) and solid oxide fuel cell (SOFC) are combined to achieve efficient power generation and CO2 separation and capture without energy consumption. The system can realize the utilization of H2 produced by CLHG in SOFC to avoid carbon deposition in it. The anode of the SOFC is completely refluxed into the steam reactor (SR) of CLHG without the need to install an afterburner, which avoids the direct combustion of fuel and greatly reduces the generation of NOx. High temperature air at SOFC cathode outlet and high temperature gas at fuel reactor (FR) outlet enter GT to do work. The transcritical carbon dioxide cycle (TRCC) is used to recover waste heat, making the system compact and efficient. The new CLHG/SOFC combined cycle system proposed in this paper has high performance, which can recover CO2 and prevent NOx generation, and also prevent carbon deposition in SOFC. In addition, the anode of SOFC is completely refluxed to SR to further improve the system performance. This paper discusses the effects of fuel flow, fuel utilization, SOFC operating temperature, system operating pressure, and CO2 turbine inlet pressure on system performance. The calculation results show that the total efficiency of the system can reach more than 80%, the power generation efficiency can reach more than 65%, and the exergy efficiency is more than 60%.

中文翻译：

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带 CO2 回收的 CLHG/SOFC 联合循环系统的热力学性能研究

摘要 本文将化学循环制氢（CLHG）和固体氧化物燃料电池（SOFC）相结合，实现高效发电和CO2分离捕集，无需能耗。该系统可实现在SOFC中利用CLHG产生的H2，避免其中积碳。SOFC的阳极完全回流到CLHG的蒸汽反应器（SR）中，无需安装加力燃烧室，避免了燃料的直接燃烧，大大减少了NOx的产生。SOFC阴极出口的高温空气和燃料反应器（FR）出口的高温气体进入GT做功。跨临界二氧化碳循环（TRCC）用于回收废热，使系统紧凑高效。本文提出的新型 CLHG/SOFC 联合循环系统具有高性能、可以回收CO2，防止NOx的产生，也可以防止SOFC中的积碳。此外，SOFC的阳极完全回流到SR，进一步提高了系统性能。本文讨论了燃料流量、燃料利用率、SOFC 工作温度、系统工作压力和 CO2 涡轮进口压力对系统性能的影响。计算结果表明，系统总效率可达80%以上，发电效率可达65%以上，火用效率可达60%以上。系统运行压力和 CO2 涡轮进口压力对系统性能的影响。计算结果表明，系统总效率可达80%以上，发电效率可达65%以上，火用效率可达60%以上。系统运行压力和 CO2 涡轮进口压力对系统性能的影响。计算结果表明，系统总效率可达80%以上，发电效率可达65%以上，火用效率可达60%以上。