In order to employ the waste heat effectively,a novel three-stage integrated system based upon a solid oxide fuel cell(SOFC),an alkali metal thermoelectric converter(AMTEC)and thermally regenerative electrochemical cy...In order to employ the waste heat effectively,a novel three-stage integrated system based upon a solid oxide fuel cell(SOFC),an alkali metal thermoelectric converter(AMTEC)and thermally regenerative electrochemical cycles(TRECs)is put forward.Considering the main electrochemically and thermodynamically irreversible losses,the power output and the efficiency of the subsystems and the integrated system are compared,and optimally operating regions for the current density,the power output,and the efficiency of the integrated system are explored.Calculations demonstrate that the maximum power density of the considered system is up to 7466 W/m2,which allows 18%and 74%higher than that of the conventional SOFC-AMTEC device and the stand-alone fuel cell model,respectively.It is proved that the considered system is an efficient approach to boost energy efficiency.Moreover,the influence of several significant parameters on the comprehensive performance of the integrated system is expounded in detail,including the electrolyte thickness of the SOFC,the leakage resistance of the SOFC,and the area ratio between the SOFC electrode and the AMTEC subsystem.展开更多
为了进一步降低固体氧化物燃料电池(solid oxide fuelcell,SOFC)复合系统回收CO2的能耗,该文提出一个新型的集成氧离子传输膜(oxygen ion transport membrane,OTM)的CO2零排放SOFC复合动力系统。利用单耗分析方法得到系统各单元的能耗...为了进一步降低固体氧化物燃料电池(solid oxide fuelcell,SOFC)复合系统回收CO2的能耗,该文提出一个新型的集成氧离子传输膜(oxygen ion transport membrane,OTM)的CO2零排放SOFC复合动力系统。利用单耗分析方法得到系统各单元的能耗分布情况,分析了SOFC的主要参数对整个系统性能的影响,并与集成传统深冷空分系统的零CO2排放SOFC复合动力系统进行了比较研究。研究结果表明:与不回收CO2的传统SOFC复合动力系统相比,与OTM集成的复合动力系统效率下降仅2.16个百分点,比与传统深冷空分系统集成的复合动力系统效率高0.74个百分点。该文研究成果可以为研究更高效的零排放复合动力系统提供有益的参考。展开更多
文摘In order to employ the waste heat effectively,a novel three-stage integrated system based upon a solid oxide fuel cell(SOFC),an alkali metal thermoelectric converter(AMTEC)and thermally regenerative electrochemical cycles(TRECs)is put forward.Considering the main electrochemically and thermodynamically irreversible losses,the power output and the efficiency of the subsystems and the integrated system are compared,and optimally operating regions for the current density,the power output,and the efficiency of the integrated system are explored.Calculations demonstrate that the maximum power density of the considered system is up to 7466 W/m2,which allows 18%and 74%higher than that of the conventional SOFC-AMTEC device and the stand-alone fuel cell model,respectively.It is proved that the considered system is an efficient approach to boost energy efficiency.Moreover,the influence of several significant parameters on the comprehensive performance of the integrated system is expounded in detail,including the electrolyte thickness of the SOFC,the leakage resistance of the SOFC,and the area ratio between the SOFC electrode and the AMTEC subsystem.
文摘为了进一步降低固体氧化物燃料电池(solid oxide fuelcell,SOFC)复合系统回收CO2的能耗,该文提出一个新型的集成氧离子传输膜(oxygen ion transport membrane,OTM)的CO2零排放SOFC复合动力系统。利用单耗分析方法得到系统各单元的能耗分布情况,分析了SOFC的主要参数对整个系统性能的影响,并与集成传统深冷空分系统的零CO2排放SOFC复合动力系统进行了比较研究。研究结果表明:与不回收CO2的传统SOFC复合动力系统相比,与OTM集成的复合动力系统效率下降仅2.16个百分点,比与传统深冷空分系统集成的复合动力系统效率高0.74个百分点。该文研究成果可以为研究更高效的零排放复合动力系统提供有益的参考。
