Study on the effect of temperature on pressure drop and under-rib convection in PEMFC

Yu, Yongshuai; Liu, Yongfeng; Zhang, Lu; Pei, Pucheng; Sun, Hua

doi:10.1080/15435075.2024.2341823

International Journal of Green Energy

2024

DOI: 10.1080/15435075.2024.2341823

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Study on the effect of temperature on pressure drop and under-rib convection in PEMFC

Yongshuai Yu,

Yongfeng Liu,

Lu Zhang

et al.

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2024

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Cited by 2 publications

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Study on the Microflow Field Output Performance: Effects of Rib/Channel Dimensions and Sensitivity to Operating Conditions

Xu,

Lu,

Yang

2024

ACS Omega

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Rib/channel dimensions significantly affect mass transfer, product water discharge, and electron transport. Aiming for high-power density stacks, bipolar plate thickness has been continually reduced, and microflow fields with the width and height smaller than 1 mm currently lack thorough experimental study. In this article, three stainless-steel plates were designed and fabricated, featuring rib/channel widths of 0.2:0.8 mm (SS-0.2/ 0.8), 0.3:0.7 mm (SS-0.3/0.7), and 0.5:0.5 mm (SS-0.5/0.5). SS-0.5/0.5 gained a 59.05% peak power density enhancement over a graphite plate G1.0/1.0 with rib/channel widths of 1.0:1.0 mm. Furthermore, sensitivities of microflow fields to cathode inlet humidity (RHc), anode/cathode inlet pressures (P a /P c ), and cell operating temperature (T cell ) were investigated. The optimal performance was observed at a low RHc. When RHc increased to 60%, SS-0.5/0.5 was more likely to accumulate water under the rib when operating at a high current density, rapidly increasing the mass transport resistance. Microflow fields had a negligible sensitivity to P a /P c since decrease in channel width below 1 mm is sufficient for the favorable mass transfer. Increasing T cell showed a dominant impact on decreasing concentration loss via facilitating diffusion of reactant gases through the electrode surfaces and alleviating the liquid water accumulation due to an increase in the saturation vapor pressure of water.

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Study on the Microflow Field Output Performance: Effects of Rib/Channel Dimensions and Sensitivity to Operating Conditions

Xu,

Lu,

Yang

2024

ACS Omega

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Model-based humidity observer for vehicle proton exchange membrane fuel cell based on a new sliding mode observer estimation technique

Huo,

Wang,

et al. 2024

International Journal of Green Energy

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Study on the effect of temperature on pressure drop and under-rib convection in PEMFC

Cited by 2 publications

References 64 publications

Study on the Microflow Field Output Performance: Effects of Rib/Channel Dimensions and Sensitivity to Operating Conditions

Study on the Microflow Field Output Performance: Effects of Rib/Channel Dimensions and Sensitivity to Operating Conditions

Model-based humidity observer for vehicle proton exchange membrane fuel cell based on a new sliding mode observer estimation technique

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