Comparative Studies of Three-Dimensional Complex Flow Field Designs in a Proton Exchange Membrane Hydrogen Fuel Cell
The performance and durability of proton-exchange membrane fuel cells (PEMFCs) are dependent on fuel flow, humidifying water, and outgoing water management. Unlike conventional flow fields with linear channels, the complex 3D flow field—featuring repeating baffles along the channel, known as the baf...
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| author | Dilyan Gavrailov Silviya Boycheva |
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| description | The performance and durability of proton-exchange membrane fuel cells (PEMFCs) are dependent on fuel flow, humidifying water, and outgoing water management. Unlike conventional flow fields with linear channels, the complex 3D flow field—featuring repeating baffles along the channel, known as the baffle design—induces a micro-scale interface flux between the gas diffusion layer (GDL) and the flow fields. Thus, an intensive oxygen flow is created that removes excess water from the GDL, thereby improving the fuel cell efficiency. Another approach for channel design is the Turing flow field, which resembles the organization of fluid flows in natural objects such as leaves, lungs, and the blood system. This design enhances the distribution of inlet flow significantly compared with traditional designs. The present study aims to combine the advantages of both Turing and baffle flow field designs and to provide model investigations on the influence of the mixed flow field design on the efficiency of PEMFCs. It was established that the mixed design achieves the highest electrode current density of 1.2 A/cm<sup>2</sup>, outperforming the other designs. Specifically, it achieves 20% improvement over the Turing design, reaching 1.0 A/cm<sup>2</sup> and generating three times more current than the baffle design, which delivers 0.4 A/cm<sup>2</sup>. In contrast, the conventional serpentine designs exhibit the lowest current density. The mixed flow field design provides better oxygen utilization in the electrochemical reaction, offers optimal membrane hydration, and contributes to superior electrode current density performance. These data illustrate how flow field structure directly impacts fuel cell efficiency through enhancement of current density. |
| format | Article |
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| issn | 1996-1073 |
| language | English |
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| spelling | doaj-art-6b9e62553c1948658621aee5b46aa0cf2025-08-20T01:49:28ZengMDPI AGEnergies1996-10732025-04-01189216510.3390/en18092165Comparative Studies of Three-Dimensional Complex Flow Field Designs in a Proton Exchange Membrane Hydrogen Fuel CellDilyan Gavrailov0Silviya Boycheva1Department of Thermal and Nuclear Power Engineering, Technical University of Sofia, 8 Kl. Ohridsky Blvd., 1000 Sofia, BulgariaDepartment of Thermal and Nuclear Power Engineering, Technical University of Sofia, 8 Kl. Ohridsky Blvd., 1000 Sofia, BulgariaThe performance and durability of proton-exchange membrane fuel cells (PEMFCs) are dependent on fuel flow, humidifying water, and outgoing water management. Unlike conventional flow fields with linear channels, the complex 3D flow field—featuring repeating baffles along the channel, known as the baffle design—induces a micro-scale interface flux between the gas diffusion layer (GDL) and the flow fields. Thus, an intensive oxygen flow is created that removes excess water from the GDL, thereby improving the fuel cell efficiency. Another approach for channel design is the Turing flow field, which resembles the organization of fluid flows in natural objects such as leaves, lungs, and the blood system. This design enhances the distribution of inlet flow significantly compared with traditional designs. The present study aims to combine the advantages of both Turing and baffle flow field designs and to provide model investigations on the influence of the mixed flow field design on the efficiency of PEMFCs. It was established that the mixed design achieves the highest electrode current density of 1.2 A/cm<sup>2</sup>, outperforming the other designs. Specifically, it achieves 20% improvement over the Turing design, reaching 1.0 A/cm<sup>2</sup> and generating three times more current than the baffle design, which delivers 0.4 A/cm<sup>2</sup>. In contrast, the conventional serpentine designs exhibit the lowest current density. The mixed flow field design provides better oxygen utilization in the electrochemical reaction, offers optimal membrane hydration, and contributes to superior electrode current density performance. These data illustrate how flow field structure directly impacts fuel cell efficiency through enhancement of current density.https://www.mdpi.com/1996-1073/18/9/2165flow field designgas distribution in fuel cellschannel configurationCOMSOL Multiphysics |
| spellingShingle | Dilyan Gavrailov Silviya Boycheva Comparative Studies of Three-Dimensional Complex Flow Field Designs in a Proton Exchange Membrane Hydrogen Fuel Cell Energies flow field design gas distribution in fuel cells channel configuration COMSOL Multiphysics |
| title | Comparative Studies of Three-Dimensional Complex Flow Field Designs in a Proton Exchange Membrane Hydrogen Fuel Cell |
| title_full | Comparative Studies of Three-Dimensional Complex Flow Field Designs in a Proton Exchange Membrane Hydrogen Fuel Cell |
| title_fullStr | Comparative Studies of Three-Dimensional Complex Flow Field Designs in a Proton Exchange Membrane Hydrogen Fuel Cell |
| title_full_unstemmed | Comparative Studies of Three-Dimensional Complex Flow Field Designs in a Proton Exchange Membrane Hydrogen Fuel Cell |
| title_short | Comparative Studies of Three-Dimensional Complex Flow Field Designs in a Proton Exchange Membrane Hydrogen Fuel Cell |
| title_sort | comparative studies of three dimensional complex flow field designs in a proton exchange membrane hydrogen fuel cell |
| topic | flow field design gas distribution in fuel cells channel configuration COMSOL Multiphysics |
| url | https://www.mdpi.com/1996-1073/18/9/2165 |
| work_keys_str_mv | AT dilyangavrailov comparativestudiesofthreedimensionalcomplexflowfielddesignsinaprotonexchangemembranehydrogenfuelcell AT silviyaboycheva comparativestudiesofthreedimensionalcomplexflowfielddesignsinaprotonexchangemembranehydrogenfuelcell |