Abdollahipour Armin, Sayyaadi Hoseyn
Lab of Optimization of Thermal Systems' Installations, Faculty of Mechanical Engineering-Energy Division, K.N. Toosi University of Technology, P.O. Box: 19395-1999, No. 15-19, Pardis St., Mollasadra Ave., Vanak Sq., Tehran, 1999 143344, Iran.
Heliyon. 2024 Jul 14;10(14):e34631. doi: 10.1016/j.heliyon.2024.e34631. eCollection 2024 Jul 30.
In order to generate clean electricity from thermal energy, a hybrid electrochemical system is conceptually developed by coupling the proton exchange membrane fuel cell (PEMFC) and solid oxide electrolyzer cell (SOEC). For evaluating the proposed hybrid system, firstly, the two subsystems are modeled numerically and then they are merged into an integrated SOEC-PEMFC system. Moreover, the SOEC-PEMFC is analytically modeled for further evaluation. The effects of important operational parameters are examined. The outcomes show that when the SOEC operating temperature increases from 823 to 1273 K, the efficiency increases from 18.7 % to 38 % and the net output power improves about 36 % while cost per unit of power of hybrid system decreases about 80 %. Furthermore, by increasing the PEMFC operating temperature from 323 to 348 K, the system net output power and efficiency increase about 16.7 % and 10 %, respectively, whilst the cost per unit of electricity decreases about 19 %. In addition by increasing operating pressure of system, the net output power and efficiency are also improved. The proposed system has maximum output power density of 3.9 kW.m and maximum efficiency of 38 %. In addition, the SOEC-PEMFC system is compared with the previously studied proton exchange membrane electrolyzer cell-proton exchange membrane fuel cell (PEMEC-PEMFC) system. In comparison with the previous PEMEC-PEMFC system, the present system's cost per unit of power and efficiency are about 16 % and 17 % higher, respectively; while the output power density is about double that of the PEMEC-PEMFC system. Generally, because hydrogen-powered systems offer reliable operation from an economic and energetic perspective, the SOEC-PEMFC system represents a promising technological solution to the clean energy demands.
为了从热能中产生清洁电力，通过耦合质子交换膜燃料电池（PEMFC）和固体氧化物电解槽电池（SOEC），从概念上开发了一种混合电化学系统。为了评估所提出的混合系统，首先，对这两个子系统进行数值建模，然后将它们合并为一个集成的SOEC - PEMFC系统。此外，对SOEC - PEMFC进行分析建模以作进一步评估。研究了重要运行参数的影响。结果表明，当SOEC运行温度从823 K升高到1273 K时，效率从18.7%提高到38%，净输出功率提高约36%，而混合系统的单位功率成本降低约80%。此外，通过将PEMFC运行温度从323 K提高到348 K，系统净输出功率和效率分别提高约16.7%和10%，同时单位电力成本降低约19%。另外，通过提高系统运行压力，净输出功率和效率也会提高。所提出的系统具有3.9 kW·m的最大输出功率密度和38%的最大效率。此外，将SOEC - PEMFC系统与先前研究的质子交换膜电解槽电池 - 质子交换膜燃料电池（PEMEC - PEMFC）系统进行了比较。与先前的PEMEC - PEMFC系统相比，本系统的单位功率成本和效率分别高出约16%和17%；而输出功率密度约为PEMEC - PEMFC系统的两倍。总体而言，由于氢动力系统从经济和能源角度提供可靠运行，SOEC - PEMFC系统是满足清洁能源需求的一种有前景的技术解决方案。
