基于不同能量回收模式的燃料电池系统性能增益研究  

An Efficiency Enhancement Mode of Fuel Cell Systems Based on Different Energy Recovery Modes

作　　者：祁明旭[1] 魏久轩 张虹[1] 黎俊韬 QI Mingxu;WEI Jiuxuan;ZHANG Hong;LI Juntao(School of Mechanical Engineering and Vehicles,Beijing Institute of Technology,Beijing 100081,China;Debo Technology Co.,LTD.,Pingxiang,Jiangxi 337000,China)

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]德博科技股份有限公司,江西萍乡337000

出　　处：《北京理工大学学报》2024年第7期692-700,共9页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(52376167)。

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%.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-εmethod 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 overall energy recovery efficiency tends to decrease as the stack loading current increases.Compared to the singlestage 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%.

关 键 词：燃料电池 径流涡轮 顺序增压 能量回收 

分 类 号：TM911.42[电气工程—电力电子与电力传动]