【摘要】 为减小燃料电池进气增压寄生功、提高系统效率，建立了以径流涡轮回收阴极排气能量的高功率燃料电池电化学、动力学与热力学系统模型，修正了基于NTU-ε法的中冷器性能预测方法，研究了单级增压-能量回收与顺序增压-能量回收模式下径流涡轮回收燃料电池阴极废气能量的效能.结果表明，整体能量回收效率随着电堆负载电流增加呈降低趋势；相比于单级增压-能量回收模式，在额定工况点与非额定工况点下顺序增压-能量回收模式的能量利用率增益显著.优化后的运行方案阴极排气能量利用率最高可提升28.9%，系统效率提升幅值达2.79%.更多还原

【Abstract】 To decrease the parasitic power required for the air compressor and enhance the fuel cell system’s overall efficiency for high-power fuel cell system, a comprehensive model encompassing electrochemistry, kinetics, and thermodynamics was developed based on recovering cathode exhaust energy of a radial turbine. Firstly,the intercooler performance prediction model was corrected based on the NTU-ε method with improved accuracy. And then, the performance of cathode exhaust gas energy recovery was investigated for radial turbine under the influence of single-stage and sequential compression-energy recovery modes. The results show that the over-all energy recovery efficiency tends to decrease as the stack loading current increases. Compared to the single-stage compression-energy recovery model, the sequential compression-energy recovery model demonstrates a significant enhancement in energy utilization at both rated and non-rated operating points. Implementing optimized operational strategy, the energy utilization rate of cathode exhaust gas can be improved up to 28.9% and system efficiency can be improved up to 2.79%.更多还原