Effect of pressure drop in different flow fields on water accumulation and current distribution for a micro PEM fuel cell

Hsieh, Shou-Shing; Her, Bing-Shyan; Huang, Y.K.

doi:10.1016/j.enconman.2010.08.025

Cited by 46 publications

(10 citation statements)

References 13 publications

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“…As the length of serpentine channel increases, the maximum pressure difference between adjacent channels will increase. Moreover, the pressure difference between adjacent channels in interdigitated flow field design can be larger than that of serpentine flow field design . In this study, 3 pressure differences Δp (4 kPa, 7 kPa, and 10 kPa) are chosen for a parametric study to illustrate the effect of Δp on the two‐phase cross flow behaviors.…”

Section: Resultsmentioning

confidence: 99%

Numerical simulation of two-phase cross flow in the gas diffusion layer microstructure of proton exchange membrane fuel cells

et al. 2017

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Summary The cross flow in the under‐land gas diffusion layer (GDL) between 2 adjacent channels plays an important role on water transport in proton exchange membrane fuel cell. A 3‐dimensional (3D) two‐phase model that is based on volume of fluid is developed to study the liquid water‐air cross flow within the GDL between 2 adjacent channels. By considering the detailed GDL microstructures, various types of air‐water cross flows are investigated by 3D numerical simulation. Liquid water at 4 locations is studied, including droplets at the GDL surface and liquid at the GDL‐catalyst layer interface. It is found that the water droplet at the higher‐pressure channel corner is easier to be removed by cross flow compared with droplets at other locations. Large pressure difference Δp facilitates the faster water removal from the higher‐pressure channel. The contact angle of the GDL fiber is the key parameter that determines the cross flow of the droplet in the higher‐pressure channel. It is observed that the droplet in the higher‐pressure channel is difficult to flow through the hydrophobic GDL. Numerical simulations are also performed to investigate the water emerging process from different pores of the GDL bottom. It is found that the amount of liquid water removed by cross flow mainly depends on the pore's location, and the water under the land is removed entirely into the lower‐pressure channel by cross flow.

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Section: Resultsmentioning

confidence: 99%

Numerical simulation of two-phase cross flow in the gas diffusion layer microstructure of proton exchange membrane fuel cells

et al. 2017

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“…Hsieh et al [12] reported on a study of operational parameters of the performance of micro PEM fuel cells with different flowfields. Furthermore, Hsieh et al [13] demonstrated how pressure drop affects fuel cell performance. It is therefore essential that an extensive examination be made of operating parameters on the polarization curves for cell stacks.…”

Section: Introductionmentioning

confidence: 98%

Design, fabrication and performance test of a planar array module-type micro fuel cell stack

Hsieh¹,

Huang²

2013

Energy Conversion and Management

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“…Tseng and Lo investigated the influences of the microstructure characteristics of the GDL and microporous layer, comprising pore size distribution, hydrophobic treatment, and gas permeability on the water removal from PEMFCs. Hsieh et al indicated that water formation, accumulation, and flooding are strongly dependent on the cathode air flow rate and channel configuration. Kahraman and Orhan reviewed the effect of flow field channel configurations on the water removal process.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of condensate removal from gas channels of PEM fuel cells using corrugated walls

El-Dosoky

Ahmed

2017

Int J Energy Res

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Summary The removal of condensate water droplets from gas channels is necessary for proper operation of proton exchange membrane fuel cells. In the current work, it is shown that corrugated wall gas channels can help in the removal of condensate water droplets formed on the channel walls. Removal of sessile droplets from channels having semicircle, rectangular dent, and saw‐tooth corrugation and at different gas velocities is modeled numerically. It is shown that the time of condensate removal is much shorter in a corrugated channel as compared with that in an uncorrugated channel. Three different droplet removal regimes are identified: droplet, film, and misty flow regimes. The transition from one to another regime is mapped based on the inlet flow velocity and the type of the channel corrugate.

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Effect of pressure drop in different flow fields on water accumulation and current distribution for a micro PEM fuel cell

Cited by 46 publications

References 13 publications

Numerical simulation of two-phase cross flow in the gas diffusion layer microstructure of proton exchange membrane fuel cells

Numerical simulation of two-phase cross flow in the gas diffusion layer microstructure of proton exchange membrane fuel cells

Design, fabrication and performance test of a planar array module-type micro fuel cell stack

Numerical simulation of condensate removal from gas channels of PEM fuel cells using corrugated walls

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