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Voltage-Dependent Optimization of Split-Flow Channels in High-Temperature PEM Fuel Cells: Balancing Ohmic and Concentration Polarization.

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Title: Voltage-Dependent Optimization of Split-Flow Channels in High-Temperature PEM Fuel Cells: Balancing Ohmic and Concentration Polarization.
Authors: Guo, Chenliang1,2 (AUTHOR), Yu, Qinglong1,2 (AUTHOR), Ye, Xuanhong1,3 (AUTHOR), Wei, Chenxu1 (AUTHOR), Shen, Wei1,2 (AUTHOR), Yang, Chengrui1,3 (AUTHOR), Xia, Chenbo1 (AUTHOR), Xiong, Shusheng1,2,3 (AUTHOR) xiongss@zju.edu.cn
Source: Energies (19961073). Apr2026, Vol. 19 Issue 8, p1957. 25p.
Subject Terms: *Ohmic resistance, *Concentration gradient, *Proton exchange membrane fuel cells, *Channel flow, *Methanol as fuel, *Mathematical optimization
Abstract: High-temperature proton exchange membrane fuel cells (HT-PEMFCs) coupled with methanol reforming hold promise for distributed energy systems, yet channel hydrodynamics and geometry optimization remain underexplored. This study develops a 3D multiphysics model to investigate coupled behaviors in HT-PEMFCs fueled by methanol reformate. Results reveal bifurcation-induced Dean vortices have dual effects: they cause flow maldistribution (15–18% velocity deviation) and contribute 50% of inlet pressure loss, while generating a lateral pumping effect that enhances local mass transfer. A continuous parametric sweep of channel widths (0.9–1.9 mm) identifies a voltage-dependent performance crossover—narrower channels (1.3 mm) excel at high voltages by improving electronic conduction, whereas wider channels (1.5 mm) perform better at low voltages by mitigating mass transfer limitations. These findings provide quantitative design criteria for optimizing flow field geometry in HT-PEMFC stacks. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 193438297
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Voltage-Dependent Optimization of Split-Flow Channels in High-Temperature PEM Fuel Cells: Balancing Ohmic and Concentration Polarization.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Guo%2C+Chenliang%22">Guo, Chenliang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yu%2C+Qinglong%22">Yu, Qinglong</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ye%2C+Xuanhong%22">Ye, Xuanhong</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wei%2C+Chenxu%22">Wei, Chenxu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shen%2C+Wei%22">Shen, Wei</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Chengrui%22">Yang, Chengrui</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xia%2C+Chenbo%22">Xia, Chenbo</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xiong%2C+Shusheng%22">Xiong, Shusheng</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<i> xiongss@zju.edu.cn</i>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Apr2026, Vol. 19 Issue 8, p1957. 25p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Ohmic+resistance%22">Ohmic resistance</searchLink><br />*<searchLink fieldCode="DE" term="%22Concentration+gradient%22">Concentration gradient</searchLink><br />*<searchLink fieldCode="DE" term="%22Proton+exchange+membrane+fuel+cells%22">Proton exchange membrane fuel cells</searchLink><br />*<searchLink fieldCode="DE" term="%22Channel+flow%22">Channel flow</searchLink><br />*<searchLink fieldCode="DE" term="%22Methanol+as+fuel%22">Methanol as fuel</searchLink><br />*<searchLink fieldCode="DE" term="%22Mathematical+optimization%22">Mathematical optimization</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: High-temperature proton exchange membrane fuel cells (HT-PEMFCs) coupled with methanol reforming hold promise for distributed energy systems, yet channel hydrodynamics and geometry optimization remain underexplored. This study develops a 3D multiphysics model to investigate coupled behaviors in HT-PEMFCs fueled by methanol reformate. Results reveal bifurcation-induced Dean vortices have dual effects: they cause flow maldistribution (15–18% velocity deviation) and contribute 50% of inlet pressure loss, while generating a lateral pumping effect that enhances local mass transfer. A continuous parametric sweep of channel widths (0.9–1.9 mm) identifies a voltage-dependent performance crossover—narrower channels (1.3 mm) excel at high voltages by improving electronic conduction, whereas wider channels (1.5 mm) perform better at low voltages by mitigating mass transfer limitations. These findings provide quantitative design criteria for optimizing flow field geometry in HT-PEMFC stacks. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.3390/en19081957
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 25
        StartPage: 1957
    Subjects:
      – SubjectFull: Ohmic resistance
        Type: general
      – SubjectFull: Concentration gradient
        Type: general
      – SubjectFull: Proton exchange membrane fuel cells
        Type: general
      – SubjectFull: Channel flow
        Type: general
      – SubjectFull: Methanol as fuel
        Type: general
      – SubjectFull: Mathematical optimization
        Type: general
    Titles:
      – TitleFull: Voltage-Dependent Optimization of Split-Flow Channels in High-Temperature PEM Fuel Cells: Balancing Ohmic and Concentration Polarization.
        Type: main
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            NameFull: Guo, Chenliang
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            NameFull: Yu, Qinglong
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            NameFull: Ye, Xuanhong
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            NameFull: Wei, Chenxu
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            NameFull: Shen, Wei
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            NameFull: Yang, Chengrui
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            NameFull: Xia, Chenbo
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            NameFull: Xiong, Shusheng
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            – D: 15
              M: 04
              Text: Apr2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 19961073
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              Value: 19
            – Type: issue
              Value: 8
          Titles:
            – TitleFull: Energies (19961073)
              Type: main
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