To improve the efficiency of the high-power proton exchange membrane fuel cell (PEMFC) system, a novel system integrated with wet compression and cathode exhaust energy recovery is proposed. A 1D steady-state model is established for the proposed system to obtain the thermodynamic operating modes. The NSGA Ⅱ algorithm is used to identify the suitable humidification strategy for each operating point. The results show that the utilization of wet compression for the PEMFC system has multiple combined benefits. Considering the available gains in the practical wet compression process, the trade-off in compression efficiency at the rated point results in an increment of 3.6 %. The parasitic power of the compressor decreases from 15.3 kW to 12.1 kW. The electrical efficiency and the net output power of the proposed system increase by 1.7 % and 8.0 kW, respectively. Furthermore, parametric analysis of wet compression reveals additional advantages in precooling and external humidification processes. At the rated point with the wet compression, the heat load of the liquid cooling heat exchanger decreases from 6.6 kW to 4.1 kW, and the water recovery ratio of the membrane humidifier reaches 30 %. The findings of the novel PEMFC system provide substantial guidelines for treating cathode exhaust gas and for the development and utilization of wet compression in fuel cell systems.

中文翻译：

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使用湿式压缩和废气能量多次利用的高功率 PEMFC 的性能改进


为提高大功率质子交换膜燃料电池 （PEMFC） 系统的效率，该文提出一种湿式压缩与阴极废气能量回收相结合的新型系统。为所提出的系统建立了一维稳态模型，以获得热力学工作模式。NSGA II. 算法用于确定适合每个工作点的加湿策略。结果表明，在 PEMFC 系统中使用湿法压缩具有多种综合优势。考虑到实际湿式压缩过程中的可用增益，在额定点处压缩效率的权衡导致 3.6% 的增量。压缩机的寄生功率从 15.3 kW 降低到 12.1 kW。所提出的系统的电效率和净输出功率分别提高了 1.7% 和 8.0 kW。此外，湿压缩的参数分析揭示了预冷和外部加湿过程的额外优势。在湿压缩的额定点，液冷换热器的热负荷从 6.6 kW 降低到 4.1 kW，膜式加湿器的水回收率达到 30 %。新型 PEMFC 系统的研究结果为处理阴极废气以及燃料电池系统中湿式压缩的开发和利用提供了重要的指导。