Fuel cell technologies are applied to the propulsion systems on aircraft to save fuel and reduce emissions. A novel hybrid engine with low specific fuel consumption by integrating solid oxide fuel cells and turbine engines is proposed in our previous papers. However, the real performance potential of the engine and the interrelation among the components have not illustrated. To demonstrate the irreversibility and show the energy flow paths of the engine, the advanced exergy and thermodynamic performance models are built and the main parts are validated. The conclusions are as follows: (1) The exergy efficiency of the engine is 49.8%. (2) The avoidable endogenous exergy destruction ratio is just 12.9%, which indicates that lots of exergy destruction rates can not be avoided by improving the components. The endogenous exergy destruction ratio is 88.5%, which means that the relationship between the components is not close. (3) Traditional exergy analysis suggests that the first improvement priority should be given to combustors, and then to SOFCs and heat exchangers. However, the order of priorities for improvements as suggested by advanced exergy analysis is different. This revised order should be first the nozzle, then the compressor, the heat exchanger, and the motor.

燃料电池技术被应用于飞机的推进系统，以节省燃料并减少排放。在我们以前的论文中提出了一种通过将固体氧化物燃料电池和涡轮发动机集成在一起而具有低比燃料消耗的新型混合动力发动机。然而，未示出发动机的实际性能潜力和部件之间的相互关系。为了证明不可逆性并显示发动机的能量流路，建立了先进的火用和热力学性能模型，并对主要零件进行了验证。结论如下：（1）发动机的火用效率为49.8％。（2）可避免的内源火用破坏率仅为12.9％，这说明不能通过改进组件来避免很多火用破坏率。内源性火用破坏率是88。5％，表示组件之间的关系不紧密。（3）传统的火用分析表明，首先应优先考虑燃烧器的改进，然后是SOFC和热交换器。但是，高级火用分析所建议的改进优先顺序是不同的。修改后的顺序应该首先是喷嘴，然后是压缩机，热交换器和电动机。