Numerical study on dual‐region mass transport at wave flow field of proton exchange membrane fuel cell

Wang, Guodong; Jiang, Lei; Lin, Peipei; Li, Jirui; Sun, Juncai

doi:10.1002/fuce.202100086

Cited by 8 publications

(2 citation statements)

References 32 publications

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“…The presence of periodic structures in the flow channel has been observed to enhance the performance of PEMEC. Wang et al [25] designed the flow channel with a periodic wave structure in the vertical direction. Compared with the conventional straight flow channel, the maximum power density of the periodic wave structure channel was increased by 4%.…”

Section: Introductionmentioning

confidence: 99%

Simulation Research on the Performance of PEMEC with Single Channel Flow Field Established by Orthogonally Sinusoidal Function with Different Amplitudes and Angular Frequencies

Yang,

Wang,

et al. 2024

International Journal of Energy Research

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As one of the main hydrogen production devices, the performance of the proton exchange membrane electrolytic cell (PEMEC) is directly related to the geometric design of the flow channel. In this paper, a new orthogonally sinusoidal channel with periodic fluctuations in both horizontal and vertical planes is proposed. The effects of amplitude and angular frequency in two orthogonally sinusoidal channels with the same or opposite frequency on PEMEC performance are studied by numerical simulation. The results show that the spatial amplitude and angular frequency effectively improve the electrochemical performance and mass transfer performance of PEMEC. Compared with Case 1-1, the polarization performance of Case 7-2 is increased by 16.39% because of the largest spatial amplitude. The oxygen content at 40 mm away from the inlet in the diffusion layer is also decreased by 42.63%. The horizontal angular frequency can increase the hydrogen content by 11.07% at most in Case 5-2. However, the increase in vertical angle frequency will inhibit the oxygen removal on the anode side. The sinusoidal flow channel in orthogonal spaces will provide a particular reference for the design of PEMEC in the future.

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Section: Introductionmentioning

confidence: 99%

Simulation Research on the Performance of PEMEC with Single Channel Flow Field Established by Orthogonally Sinusoidal Function with Different Amplitudes and Angular Frequencies

Yang,

Wang,

et al. 2024

International Journal of Energy Research

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“…For the gas flow channels of PEMFCs, parallel, pin type, serpentine, and interdigitated designs are commonly used [8,9]. New modern flow field designs such as wave flow field, spiral flow field design, and porous metal foam flow field designs have been also proposed [10][11][12]. Among these various flow fields, interdigitated gas distributors seem to be the most effective design in water removal from the PEMFC since this flow field changes the reactants transport mechanism from diffusion dominated to the forced convection-dominated mechanism, which results in considerable water removal, better delivery of reactants to the catalyst layer (CL) and higher fuel cell performance [13,14].…”

Section: Introductionmentioning

confidence: 99%

A parametric numerical study on the performance of polymer electrolyte membrane fuel cell with intermediate‐blocked interdigitated flow field designs

et al. 2023

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Flow field design is crucial for achieving higher performance in polymer electrolyte membrane fuel cells (PEMFCs). This study uses a two‐phase, multi‐component, and three‐dimensional model to simulate the performance of PEMFCs that use interdigitated flow field design with intermediate blocks on the cathode side. A detailed parametric study is presented to investigate the effects of various geometric and operational parameters. Of the parameters studied, inlet mass flow rate, relative humidity, and rib width had the greatest impact on cell performance. The results show that increasing the cathode stoichiometric ratio resulted in higher fuel cell performance for blocked interdigitated designs compared to parallel designs. In addition, using cathode channels with higher height values resulted in lower PEMFC performance for all flow fields. Higher values of rib/channel width ratio resulted in lower cell performance due to liquid water accumulation in the rib regions. However, at higher rib/channel width ratios, the positive effect of using interdigitated flow designs was more pronounced. Moreover, at a low relative humidity of RH = 25%, a 10.4% higher performance was obtained for the interdigitated type II compared to cases with RH = 100%, due to more effective over‐rib convection and higher water removal.

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Study on the Influence of GDL Porosity Distribution Variation on PEMFC Performance Under Assembly Pressure

Cao,

Xing,

Cao

et al. 2024

Fuel Cells

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The porosity of the gas diffusion layer (GDL) significantly impacts the performance of proton exchange membrane fuel cells (PEMFCs). Assembly pressure in PEMFCs leads to GDL deformation and alterations in porosity distribution. This study integrated a three‐dimensional (3D) GDL deformation model with a 3D two‐phase PEMFC model, employing a four‐term Fourier series model to optimize the fitting of the GDL porosity distribution curve. The approach quantitatively assessed the impact of GDL porosity distribution under assembly pressure on PEMFC performance. Results reveal an arched porosity distribution in GDL, peaking in the middle of low channels adjacent to ribs. High porosity enhances oxygen and heat conduction but excessive porosity may cause uneven current density distribution, hindering GDL drainage. Furthermore, the analysis compares performances at various GDL compression ratios and thicknesses, showing an initial rise then fall in current density with increasing pressure. This represents a trade‐off between the adverse impact of GDL compression on mass transfer losses and the favorable impact of reduced ohmic losses. At the optimal pressure, the current density is 3% higher than neighboring values at the same potential, and within the optimal GDL thickness range, the current density error remains below 1%.

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Numerical study on dual‐region mass transport at wave flow field of proton exchange membrane fuel cell

Cited by 8 publications

References 32 publications

Simulation Research on the Performance of PEMEC with Single Channel Flow Field Established by Orthogonally Sinusoidal Function with Different Amplitudes and Angular Frequencies

Simulation Research on the Performance of PEMEC with Single Channel Flow Field Established by Orthogonally Sinusoidal Function with Different Amplitudes and Angular Frequencies

A parametric numerical study on the performance of polymer electrolyte membrane fuel cell with intermediate‐blocked interdigitated flow field designs

Study on the Influence of GDL Porosity Distribution Variation on PEMFC Performance Under Assembly Pressure

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