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Volume 55 Issue 4
Jul.  2020
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Article Contents
Journal of Southwest Jiaotong University  > 2020  >  55(4): 828-838, 864.
ZHANG Xuexia, JIANG Yu, SUN Tengfei, CHEN Weirong. Review on Fault Diagnosis for Flooding and Drying in Proton Exchange Membrane Fuel Cells[J]. Journal of Southwest Jiaotong University, 2020, 55(4): 828-838, 864. doi: 10.3969/j.issn.0258-2724.20190548
Citation: ZHANG Xuexia, JIANG Yu, SUN Tengfei, CHEN Weirong. Review on Fault Diagnosis for Flooding and Drying in Proton Exchange Membrane Fuel Cells[J]. Journal of Southwest Jiaotong University, 2020, 55(4): 828-838, 864. doi: 10.3969/j.issn.0258-2724.20190548
shu

Review on Fault Diagnosis for Flooding and Drying in Proton Exchange Membrane Fuel Cells

doi: 10.3969/j.issn.0258-2724.20190548
  • Received Date: 17 Jun 2019
  • Rev Recd Date: 13 Nov 2019
    • Available Online: 26 Nov 2019
  • Publish Date: 01 Aug 2020
    Abstract
  • In running proton exchange membrane fuel cells (PEMFCs), the flooding and drying are the most common faults. Firstly, water generation and transfer mechanism in PEMFCs are elaborated, and the impact factors of flooding and drying faults are generalized. The diagnostic indicators for flooding and drying in terms of voltage, pressure drop, and impedance are listed with the analysis on their merits and demerits. In addition, the damages caused by flooding and drying faults are presented from the perspective of internal structure and charge transport. Next, the model-based, experimental-based, and data-driven diagnostic methods for flooding and drying faults and their application range are discussed. Moreover, popular mitigation strategies for flooding and drying are analyzed. Finally, the researches on flooding and drying are summarized and their prospects are presented. Of these researches, online diagnostic approaches based on data-driven, model establishment for fault diagnosis, flooding and drying diagnosis in large-scale stacks and multi-stacks, and the efficient and accurate diagnostic indicators need further studies.

     

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  • 陈维荣,钱清泉,李奇. 燃料电池混合动力列车的研究现状与发展趋势[J]. 西南交通大学学报,2009,44(1): 1-6. doi: 10.3969/j.issn.0258-2724.2009.01.001

    CHEN Weirong, QIAN Qingquan, LI Qi. Investigation status and development trend of hybrid power train based on fuel cell[J]. Journal of Southwest Jiaotong University, 2009, 44(1): 1-6. doi: 10.3969/j.issn.0258-2724.2009.01.001
    衣宝廉. 燃料电池的原理、技术状态与展望[J]. 电池工业,2003,8(1): 16-22. doi: 10.3969/j.issn.1008-7923.2003.01.006

    YI Baolian. Fuel cell:fundamental,technology and prospect[J]. Chinese Battery Industry, 2003, 8(1): 16-22. doi: 10.3969/j.issn.1008-7923.2003.01.006
    曾祥坤,王小红,杨晓莉. 国外铁路燃料电池机车车辆的研究进展[J]. 中国铁路,2011(11): 72-75. doi: 10.3969/j.issn.1001-683X.2011.11.020

    ZENG Xiangkun, WANG Xiaohong, YANG Xiaoli. Research progress of foreign railway fuel cell locomotives and vehicles[J]. Chinese Railways, 2011(11): 72-75. doi: 10.3969/j.issn.1001-683X.2011.11.020
    陈维荣,刘嘉蔚,李奇,等. 质子交换膜燃料电池故障诊断方法综述及展望[J]. 中国电机工程学报,2017,37(16): 4712-4721.

    CHEN Weirong, LIU Jiawei, LI Qi, et al. Review and prospect of fault diagnosis methods for proton exchange membrane fuel cell[J]. Proceedings of the CSEE, 2017, 37(16): 4712-4721.
    陈维荣,朱亚男,李奇,等. 轨道交通用多堆燃料电池发电系统拓扑及系统控制与检测方法综述及展望[J]. 中国电机工程学报,2018,38(23): 6967-6980.

    CHEN Weirong, ZHU Yanan, LI Qi, et al. Review and prospect of structures,control and detection schemes of multi-stack fuel cell power generation system used in rail traffic[J]. Proceedings of the CSEE, 2018, 38(23): 6967-6980.
    KANDLIKAR S G, GAROFALO M L, LU Z. Water management in a PEMFC:water transport mechanism and material degradation in gas diffusion layers[J]. Fuel Cells, 2011, 11(6): 814-823. doi: 10.1002/fuce.201000172
    ENDOH E. Degradation study of MEA for PEMFC under low humidity conditions[J]. Electrochemical and Solid-State Letters, 2004, 7(7): A209-A211. doi: 10.1149/1.1739314
    杨代军,汪飞杰,李冰,等. PEMFC电堆加速老化测试及性能恢复现象分析[J]. 同济大学学报(自然科学版),2015,43(2): 273-279.

    YANG Daijun, WANG Feijie, LI Bing, et al. Accelerated aging test and performance recovery analysis of PEMFC stack[J]. Journal of Tongji University (Nature Science), 2015, 43(2): 273-279.
    KADYK T, HANKE-RAUSCHENBACH R, KAI S. Nonlinear frequency response analysis of dehydration phenomena in polymer electrolyte membrane fuel cells[J]. International Journal of Hydrogen Energy, 2012, 37(9): 7689-7701. doi: 10.1016/j.ijhydene.2012.01.148
    PANHA K, FOWLER M, YUAN X Z, et al. Accelerated durability testing via reactants relative humidity cycling on PEM fuel cells[J]. Applied Energy, 2012, 93(5): 90-97.
    ZHAN Z G, XIAO J S, LI D Y, et al. Effects of porosity distribution variation on the liquid water flux through gas diffusion layers of PEM fuel cells[J]. Journal of Power Sources, 2006, 160(2): 1041-1048. doi: 10.1016/j.jpowsour.2006.02.060
    ZHAN Z G, XIAO J S, PAN M, et al. Characteristics of droplet and film water motion in the flow channels of polymer electrolyte membrane fuel cells[J]. Journal of Power Sources, 2006, 160(1): 1-9. doi: 10.1016/j.jpowsour.2005.12.081
    CAI Y H, YANG T Q, SUI P C, et al. A numerical investigation on the effects of water inlet location and channel surface properties on water transport in PEMFC cathode channels[J]. International Journal of Hydrogen Energy, 2016, 41(36): 16220-16229. doi: 10.1016/j.ijhydene.2016.04.241
    JING S, LIN R, XIA S X, et al. Local resolved investigation of PEMFC performance degradation mechanism during dynamic driving cycle[J]. International Journal of Hydrogen Energy, 2016, 41(7): 4239-4250. doi: 10.1016/j.ijhydene.2016.01.048
    ZHANG Q, LIN R, TECHER L, et al. Experimental study of variable operating parameters effects on overall PEMFC performance and spatial performance distribution[J]. Energy, 2016, 115: 550-560. doi: 10.1016/j.energy.2016.08.086
    ZHAO J, SHAHGALDI S, LI X G, et al. Experimental observations of microstructure changes in the catalyst layers of proton exchange membrane fuel cells under wet-dry cycles[J]. Journal of the Electrochemical Society, 2018, 165(6): F3337-F3345. doi: 10.1149/2.0391806jes
    张金辉, 裴普成. 车用质子交换膜燃料电池膜干化和水淹诊断研究[C]//北京汽车工程学会学术年会. 北京: [出版者不详], 2009: 323-331.
    华周发. 质子交换膜燃料电池反极现象研究[D]. 武汉: 武汉理工大学, 2006.
    BRÈQUE F, RAMOUSSE J, DUBÉ Y, et al. Sensibility study of flooding and drying issues to the operating conditions in PEM fuel cells[J]. International Journal of Energy and Environment, 2010, 1(1): 1-20.
    戴朝华,史青,陈维荣,等. 质子交换膜燃料电池单体电压均衡性研究综述[J]. 中国电机工程学报,2016,36(5): 1289-1302.

    DAI Chaohua, SHI Qing, CHEN Weirong, et al. A review of the single cell voltage uniformity in proton exchange membrane fuel cells[J]. Proceedings of the CSEE, 2016, 36(5): 1289-1302.
    PEI P C, LI Y H, XU H C, et al. A review on water fault diagnosis of PEMFC associated with the pressure drop[J]. Applied Energy, 2016, 173: 366-385. doi: 10.1016/j.apenergy.2016.04.064
    宋满存,裴普成,曾夏,等. PEMFC 水淹的阳极气体压力降变化特征预警技术[J]. 农业机械学报,2014,45(7): 340-346. doi: 10.6041/j.issn.1000-1298.2014.07.052

    SONG Mancun, PEI Pucheng, ZENG Xia, et al. Flooding prediction based on characteristics of hydrogen pressure drop in PEMFC[J]. Transactions of the Chinese Society of Agricultural Machinery, 2014, 45(7): 340-346. doi: 10.6041/j.issn.1000-1298.2014.07.052
    ITO K, ASHIKAGA K, MASUDA H, et al. Estimation of flooding in PEMFC gas diffusion layer by differential pressure measurement[J]. Journal of Power Sources, 2008, 175(2): 732-738. doi: 10.1016/j.jpowsour.2007.10.019
    宋满存. 质子交换膜燃料电池水淹过程研究及故障诊断系统设计[D]. 北京: 清华大学, 2013.
    SONG M C, PEI P C, ZHA H S, et al. Water management of proton exchange membrane fuel cell based on control of hydrogen pressure drop[J]. Journal of Power Sources, 2014, 267: 655-663. doi: 10.1016/j.jpowsour.2014.05.094
    LI Z L, OUTBIB R, HISSEL D, et al. Data-driven diagnosis of PEM fuel cell:a comparative study[J]. Control Engineering Practice, 2014, 28: 1-12. doi: 10.1016/j.conengprac.2014.02.019
    YOUSFI-STEINER N, MOÇOTÉGUY P, CANDUSSO D, et al. A review on PEM voltage degradation associated with water management:impacts,influent factors and characterization[J]. Journal of power sources, 2008, 183(1): 260-274. doi: 10.1016/j.jpowsour.2008.04.037
    LI Z L, OUTBIB R, GIURGEA S, et al. Fault detection and isolation for polymer electrolyte membrane fuel cell systems by analyzing cell voltage generated space[J]. Applied Energy, 2015, 148(1): 260-272.
    LU Z, KANDLIKAR S G, RATH C, et al. Water management studies in PEM fuel cells,part Ⅱ:ex situ investigation of flow maldistribution,pressure drop and two-phase flow pattern in gas channels[J]. International Journal of Hydrogen Energy, 2009, 34(8): 3445-3456. doi: 10.1016/j.ijhydene.2008.12.025
    ANDERSON R, WILKINSON D P, BI X T, et al. Two-phase flow pressure drop hysteresis in an operating proton exchange membrane fuel cell[J]. Journal of Power Sources, 2011, 196(19): 8031-8040. doi: 10.1016/j.jpowsour.2011.05.050
    GRIMM M, SEE E J, KANDLIKAR S G, et al. Modeling gas flow in PEMFC channels:part Ⅰ-flow pattern transitions and pressure drop in a simulated ex situ channel with uniform water injection through the GDL[J]. International Journal of Hydrogen Energy, 2012, 37(17): 12489-12503. doi: 10.1016/j.ijhydene.2012.06.001
    全睿. 车用燃料电池系统故障诊断与维护若干关键问题研究[D]. 武汉: 武汉理工大学, 2011.
    BOSHKOSKA B M, BOSKOSKI P, ANDREJ D, et al. Dependence among complex random variables as a fuel cell condition indicator[J]. Journal of Power Sources, 2015, 284: 566-573. doi: 10.1016/j.jpowsour.2015.03.044
    YANG X G, YE Q, CHENG P. In-plane transport effects on hydrogen depletion and carbon corrosion induced by anode flooding in proton exchange membrane fuel cells[J]. International Journal of Heat and Mass Transfer, 2012, 55(17): 4754-4765.
    OWEJAN J P, TRABOLD T A, GAGLIARDO J J, et al. Voltage instability in a simulated fuel cell stack correlated to cathode water accumulation[J]. Journal of Power Sources, 2007, 171(2): 626-633. doi: 10.1016/j.jpowsour.2007.06.174
    ST-PIERRE J, WILKINSOR D P, KNIGHTS S, et al. Relationships between water management,contamination and lifetime degradation in PEFC[J]. Journal of New Materials for Electrochemical Systems, 2000, 3(2): 99-106.
    SANCHEZ D G, GARCIA-YBARRA P L. PEMFC operation failure under severe dehydration[J]. International Journal of Hydrogen Energy, 2012, 37(8): 7279-7288. doi: 10.1016/j.ijhydene.2011.11.059
    张洪霞,沈承,韩福江,等. 质子交换膜燃料电池的水平衡[J]. 化学通报,2011,74(11): 1026-1032.

    ZHANG Hongxia, SHEN Cheng, HAN Fujiang, et al. Water balance of proton exchange membrane fuel cell[J]. Chemistry, 2011, 74(11): 1026-1032.
    PETRONE R, ZHENG Z X, HISSEL D, et al. A review on model-based diagnosis methodologies for PEMFCs[J]. International Journal of Hydrogen Energy, 2013, 38(17): 7077-7091. doi: 10.1016/j.ijhydene.2013.03.106
    郭家兴,朱新坚,曹广益. 质子交换膜燃料电池故障诊断[J]. 电源技术,2008,32(8): 528-531. doi: 10.3969/j.issn.1002-087X.2008.08.011

    GUO Jixing, ZHU Xinjian, CAO Guangyi. Fault diagnosis of PEMFC[J]. Chinese Journal of Power Sources, 2008, 32(8): 528-531. doi: 10.3969/j.issn.1002-087X.2008.08.011
    周苏,任宏伟,裴冯来. 基于诊断用COMSOL模型的PEMFC故障诊断方法研究[J]. 化学工业与工程,2015,32(4): 56-62.

    ZHOU Su, REN Hongwei, PEI Fenglai. Faults diagnosis method study of PEMFC based on a diagnostic COMSOL model[J]. Chemical Industry and Engineering, 2015, 32(4): 56-62.
    魏雨辰,裴冯来,周苏. 基于快速EIS方法和PEMFC模型的故障分类研究[J]. 佳木斯大学学报(自然科学版),2014,32(6): 839-843. doi: 10.3969/j.issn.1008-1402.2014.06.010

    WEI Yuchen, PEI Fenglai, ZHOU Su. A simulation study on parameters of the cathode diffusion layer in PEMFC[J]. Journal of Jiamusi University (Natural Science Edition), 2014, 32(6): 839-843. doi: 10.3969/j.issn.1008-1402.2014.06.010
    GEBREGERGIS A, PILLAY P, RENGASWEMY R. PEMFC fault diagnosis,modeling,and mitigation[J]. IEEE Transactions on Industry Applications, 2010, 46(1): 295-303. doi: 10.1109/TIA.2009.2036677
    SPRINGER T E, ZAWODZINSKI T A, GOTTESFELD S. Polymer electrolyte fuel cell model[J]. Journal of the Electrochemical Society, 1991, 138(8): 2334-2342. doi: 10.1149/1.2085971
    GIURGEA S, TIRNOVAN R, HISSEL D, et al. An analysis of fluidic voltage statistical correlation for a diagnosis of PEM fuel cell flooding[J]. International Journal of Hydrogen Energy, 2013, 38(11): 4689-4696. doi: 10.1016/j.ijhydene.2013.01.060
    朱星光. 质子交换膜燃料电池控制策略研究[D]. 成都: 西南交通大学, 2013.
    HE W S, LIN G Y, VAN N T. Diagnostic tool to detect electrode flooding in proton-exchange-membrane fuel cells[J]. AIChE Journal, 2003, 49(12): 3221-3228. doi: 10.1002/aic.690491221
    BARBIR F, GORGUN H, WANG X. Relationship between pressure drop and cell resistance as a diagnostic tool for PEM fuel cells[J]. Journal of Power Sources, 2005, 141(1): 96-101. doi: 10.1016/j.jpowsour.2004.08.055
    PEI P C, CHEN H C. Main factors affecting the lifetime of proton exchange membrane fuel cells in vehicle applications:a review[J]. Applied Energy, 2014, 125: 60-75. doi: 10.1016/j.apenergy.2014.03.048
    罗良庆. 燃料电池内阻在线测试软件系统与健康状态监测研究[D]. 武汉: 武汉理工大学, 2010.
    LE CANUT J M, ABOUATALLAH R M, HARRINGTON D A. Detection of membrane drying,fuel cell flooding,and anode catalyst poisoning on PEMFC stacks by electrochemical impedance spectroscopy[J]. Journal of the Electrochemical Society, 2006, 153(5): A857-A864. doi: 10.1149/1.2179200
    谭保华. 车用质子交换膜燃料电池湿度软测量研究[D]. 武汉: 武汉理工大学, 2014.
    舒芝锋. 燃料电池单片内阻在线测试与PEM含水量软测量研究[D]. 武汉: 武汉理工大学, 2008.
    LEGROS B, THIVEL P X, DRUART F, et al. Diagnosis and modelling of proton-exchange-membrane fuel cell via electrochemical-impedance-spectroscopy and acoustic-emission measurements[C]//8th International Symposium on Advanced Electromechanical Motion Systems & Electric Drives Joint Symposium. [S.l.]: IEEE, 2009: 1-6.
    鲜亮,肖建,贾俊波. 质子交换膜燃料电池交流阻抗谱实验研究[J]. 中国电机工程学报,2010(35): 101-106.

    XIAN Liang, XIAO Jian, JIA Junbo. An experimental study on AC impedance spectroscopy of proton exchange membrane fuel cell[J]. Proceedings of the CSEE, 2010(35): 101-106.
    FOUQUET N, DOULET C, NOUILLANT C, et al. Model based PEM fuel cell state-of-health monitoring via AC impedance measurements[J]. Journal of Power Sources, 2006, 159(2): 905-913. doi: 10.1016/j.jpowsour.2005.11.035
    KURZ T, HAKENJOS A, JEROME K, et al. An impedance-based predictive control strategy for the state-of-health of PEM fuel cell stacks[J]. Journal of Power Sources, 2008, 180(2): 742-747. doi: 10.1016/j.jpowsour.2008.02.062
    ROY S K, ORAZEM M E. Analysis of flooding as a stochastic process in polymer electrolyte membrane (PEM) fuel cells by impedance techniques[J]. Journal of Power Sources, 2008, 184(1): 212-219. doi: 10.1016/j.jpowsour.2008.06.014
    LEE C Y, LEE Y M. In-situ diagnosis of local fuel cell performance using novel micro sensors[J]. International Journal of Hydrogen Energy, 2012, 37(5): 4448-4456. doi: 10.1016/j.ijhydene.2011.11.098
    DEBENJAK A, GAŠPERIN M, PREGELJ B, et al. Detection of flooding and drying inside a PEM fuel cell stack[J]. Strojniški Vestnik-Journal of Mechanical Engineering, 2013, 59(1): 56-64. doi: 10.5545/sv-jme.2012.640
    YOUSFI-STEINER N, HISSEL D, MOÇOTÉGUY P, et al. Diagnosis of polymer electrolyte fuel cells failure modes (flooding & drying out) by neural networks modeling[J]. International Journal of Hydrogen Energy, 2011, 36(4): 3067-3075. doi: 10.1016/j.ijhydene.2010.10.077
    LI H, TANG Y, WANG Z, et al. A review of water flooding issues in the proton exchange membrane fuel cell[J]. Journal of Power Sources, 2008, 178(1): 103-117. doi: 10.1016/j.jpowsour.2007.12.068
    BELLOWS R J, LIN M Y, ARIF M, et al. Neutron imaging technique for in situ measurement of water transport gradients within Nafion in polymer electrolyte fuel cells[J]. Journal of the Electrochemical Society, 1999, 146(3): 1099-1103. doi: 10.1149/1.1391727
    GEBEL G, DIAT O, ESCRIBANO S, et al. Water profile determination in a running PEMFC by small-angle neutron scattering[J]. Journal of Power Sources, 2008, 179(1): 132-139. doi: 10.1016/j.jpowsour.2007.12.124
    BAZYLAK A, SINTON D, DJILALI N. Dynamic water transport and droplet emergence in PEMFC gas diffusion layers[J]. Journal of Power Sources, 2008, 176(1): 240-246. doi: 10.1016/j.jpowsour.2007.10.066
    AFRA M, NAZARI M, KAYHANI M H, et al. 3D experimental visualization of water flooding in proton exchange membrane fuel cells[J]. Energy, 2019, 175: 967-977. doi: 10.1016/j.energy.2019.03.128
    GARCIA-SALABERRI P A, SANCHEZ D G, BOILLAT P, et al. Hydration and dehydration cycles in polymer electrolyte fuel cells operated with wet anode and dry cathode feed:a neutron imaging and modeling study[J]. Journal of Power Sources, 2017, 359: 634-655. doi: 10.1016/j.jpowsour.2017.03.155
    AKITOMO F, SASABE T, YOSHIDA T, et al. Investigation of effects of high temperature and pressure on a polymer electrolyte fuel cell with polarization analysis and X-ray imaging of liquid water[J]. Journal of Power Sources, 2019, 431: 205-209. doi: 10.1016/j.jpowsour.2019.04.115
    张新丰,章桐. 质子交换膜燃料电池水含量实验测量方法综述[J]. 仪器仪表学报,2012,33(9): 2152-2152.

    ZHANG Xinfeng, ZHANG Tong. Review on water content measurement technology for PEM fuel cell[J]. Chinese Journal of Scientific Instrument, 2012, 33(9): 2152-2152.
    李晗,萧德云. 基于数据驱动的故障诊断方法综述[J]. 控制与决策,2011,26(1): 1-9.

    LI Han, XIAO Deyun. Survey on data driven fault diagnosis methods[J]. Control and Decision, 2011, 26(1): 1-9.
    ZHENG Z X, PETRONE R, PÉRA M, et al. A review on non-model based diagnosis methodologies for PEM fuel cell stacks and systems[J]. International Journal of Hydrogen Energy, 2013, 38: 8914-8926. doi: 10.1016/j.ijhydene.2013.04.007
    LI Z L, OUTBIB R, HISSEL D, et al. Online diag- nosis of PEMFC by analyzing individual cell voltages[C]//Control Conference (ECC), 2013. Zürich: IEEE, 2013: 2439-2444.
    ZHENG Z X. On-line fault diagnosis of PEMFC stacks via non-model based methods and EIS measurements[D]. Besançon: Université De Franche-Comté, 2014.
    刘嘉蔚,李奇,陈维荣,等. 基于概率神经网络和线性判别分析的PEMFC水管理故障诊断方法研究[J]. 中国电机工程学报,2019,39(12): 3614-3622.

    LIU Jiawei, LI Qi, CHEN Weirong, et al. Research on PEMFC water management fault diagnosis method based on probabilistic neural network and linear discriminant analysis[J]. Proceedings of the CSEE, 2019, 39(12): 3614-3622.
    HAO L, YU H, HOU J, et al. Transient behavior of water generation in a proton exchange membrane fuel cell[J]. Journal of Power Sources, 2008, 177(2): 404-411. doi: 10.1016/j.jpowsour.2007.11.034
    李桦,王世学. 不同水传输机理模型下的PEMFC水管理[J]. 工程热物理学报,2013,34(8): 1483-1486.

    LI Hua, WANG Shixue. Water management of PEMFC under different water transfer mechanism[J]. Journal of Engineering Thermo physics, 2013, 34(8): 1483-1486.
    BUNMARK N, LIMTRAKUL S, FOWLER M W, et al. Assisted water management in a PEMFC with a modified flow field and its effect on performance[J]. International Journal of Hydrogen Energy, 2010, 35(13): 6887-6896. doi: 10.1016/j.ijhydene.2010.04.027
    YAN X H, GUAN C, ZHANG Y, et al. Flow field design with 3D geometry for proton exchange membrane fuel cells[J]. Applied Thermal Engineering, 2019, 147: 1107-1114. doi: 10.1016/j.applthermaleng.2018.09.110
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