该文模拟常规矩形平行流场、正六边形平行流场和正六边形蜂窝状仿生学流场对质子交换膜燃料电池（PEMFC）性能的影响。通过对极化曲线、氧气和水分布、膜电流密度以及压降和寄生功率密度进行分析,结果表明：正六边形流场表现出良好的输出性能,且正六边形蜂窝状流场的电流密度比常规矩形平行流场和正六边形平行流场分别提升11.28%和4.95%。此外,常规矩形平行流场、正六边形平行流场和正六边形蜂窝状流场的氧气不均匀度分别为0.64、0.53和0.41,正六边形蜂窝状流场展现出更好的水和膜电流密度分布能力,进一步说明正六边形流场缓解了氧气、水和膜电流密度分布不均匀的问题。正六边形蜂窝状流场压降虽比常规矩形平行流场和正六边形平行流场分别增加40.0%和27.7%,有较高的寄生功率密度,但仍获得了最大的净输出功率密度。
Abstract
In this paper, the effects of conventional rectangular parallel, regular hexagonal parallel, and hexagonal honeycomb-like flow fields on the performance of proton exchange membrane fuel cells （PEMFC） are simulated. The polarization curve, distribution of oxygen and water, current density of membrane, and pressure drop and parasitic power density are analyzed. It is found that the regular hexagonal flow field shows a better output performance, and the current density of the hexagonal honeycomb-like flow field is 11.28% and 4.95% higher than that of the conventional parallel and regular hexagonal parallel flow fields, respectively. In addition, the oxygen non-uniformity of the conventional rectangular parallel, regular hexagonal parallel and hexagonal honeycomb-like flow channels are 0.64, 0.53 and 0.41, and the honeycomb-like flow field shows a better distribution capacity of water and current density of membrane, which further indicates that the regular hexagonal flow field alleviates the problem of non-uniform distribution of oxygen, water, and current density of membrane. Although the pressure drop of the hexagonal honeycomb-like flow field is increased by 40.0% and 27.7% compared with the conventional rectangular parallel and the regular hexagonal parallel flow fields and the parasitic power density is higher, the maximum net output power density is still abtained.
关键词
质子交换膜燃料电池 /
流场 /
数值模拟 /
结构优化
Key words
proton exchange membrane fuel cells /
flow field /
numerical simulation /
structural optimization
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] FAN L H, ZHANG G B, JIAO K.Characteristics of PEMFC operating at high current density with low external humidification[J]. Energy conversion and management, 2017, 150: 763-774.
[2] PEI H C, MENG K, CHANG H W, et al.Performance improvement in a proton exchange membrane fuel cell with separated coolant flow channels in the anode and cathode[J]. Energy conversion and management, 2019, 187: 76-82.
[3] STAFFELL I, SCAMMAN D, ABAD A V, et al.The role of hydrogen and fuel cells in the global energy system[J]. Energy & environmental science, 2019, 12(2): 463-491.
[4] ZHANG S Y, XU H T, QU Z G, et al.Bio-inspired flow channel designs for proton exchange membrane fuel cells: a review[J]. Journal of power sources, 2022, 522: 231003.
[5] LIM K, VAZ N, LEE J, et al.Advantages and disadvantages of various cathode flow field designs for a polymer electrolyte membrane fuel cell[J]. International journal of heat and mass transfer, 2020, 163: 120497.
[6] MIN C H, HE J, WANG K, et al.A comprehensive analysis of secondary flow effects on the performance of PEMFCs with modified serpentine flow fields[J]. Energy conversion and management, 2019, 180: 1217-1224.
[7] WANG Y L, YUE L K, WANG S X.New design of a cathode flow-field with a sub-channel to improve the polymer electrolyte membrane fuel cell performance[J]. Journal of power sources, 2017, 344: 32-38.
[8] 叶可, 颜永文, 李君, 等. 基于不同流道的PEMFC传质与水热平衡数值模拟[J]. 太阳能学报, 2021, 42(10): 349-354.
YE K, YAN Y W, LI J, et al.Numerical simulation of mass transfer and hydrothermal balance in PEMFC based on different flow channels[J]. Acta energiae solaris sinica, 2021, 42(10): 349-354.
[9] KANG H C, JUM K M, SOHN Y J.Performance of unit PEM fuel cells with a leaf-vein-simulating flow field-patterned bipolar plate[J]. International journal of hydrogen energy, 2019, 44(43): 24036-24042.
[10] 谢启真, 郑明刚. PEMFC叶脉型仿生流道夹角参数研究[J]. 太阳能学报, 2021, 42(10): 361-366.
XIE Q Z, ZHENG M G.Research on flow channel angle parameters of bionic leaf-vein in PEMFC[J]. Acta energiae solaris sinica, 2021, 42(10): 361-366.
[11] DAMIAN-ASCENCIO C E, SALDANA-ROBLES A, HERNANDEZ-GUERRERO A, et al. Numerical modeling of a proton exchange membrane fuel cell with tree-like flow field channels based on an entropy generation analysis[J]. Energy, 2017, 133: 306-316.
[12] ZHANG S Y, LIU S, XU H T, et al.Performance of proton exchange membrane fuel cells with honeycomb-like flow channel design[J]. Energy, 2022, 239: 122102.
[13] ZHANG S Y, QU Z G, XU H T, et al.A numerical study on the performance of PEMFC with wedge-shaped fins in the cathode channel[J]. International journal of hydrogen energy, 2021, 46(54): 27700-27708.
[14] ZHANG G B, FAN L H, SUN J, et al.A 3D model of PEMFC considering detailed multiphase flow and anisotropic transport properties[J]. International journal of heat and mass transfer, 2017, 115: 714-724.
[15] CAI G C, LIANG Y M, LIU Z C, et al.Design and optimization of bio-inspired wave-like channel for a PEM fuel cell applying genetic algorithm[J]. Energy, 2020, 192: 116670.
[16] CHANG D H, WU S Y.The effects of channel depth on the performance of miniature proton exchange membrane fuel cells with serpentine-type flow fields[J]. International journal of hydrogen energy, 2015, 40(35): 11659-11667.
[17] SEZGIN B, CAGLAYAN D G, DEVRIM Y, et al.Modeling and sensitivity analysis of high temperature PEM fuel cells by using Comsol Multiphysics[J]. International journal of hydrogen energy, 2016, 41(23): 10001-10009.
[18] WANG X D, LU G, DUAN Y Y, et al.Numerical analysis on performances of polymer electrolyte membrane fuel cells with various cathode flow channel geometries[J]. International journal of hydrogen energy, 2012, 37(20): 15778-15786.
PDF(2141 KB)
