Interfacial Phenomena and Heat Transfer in Proton Exchange Membrane Fuel Cells

Liu, Jia Xing; Guo, Hang; Ye, Fang; Qiu, De Cai; Fang, Chong

doi:10.1615/interfacphenomheattransfer.2016014779

Cited by 38 publications

(13 citation statements)

References 268 publications

(333 reference statements)

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“…However, this assumption is not that accurate considering the influence of liquid water in flow field on gas supply from flow field to porous electrodes. As we all know, the two‐phase flow in the whole PEMFC has a very significant influence; at this point, Liu et al has reviewed the detailed two‐phase interfacial phenomena in PEMFC. However, coupling the complete two‐phase interfacial phenomena with electrochemical reactions in PEMFC is still hard to achieve .…”

Section: Introductionmentioning

confidence: 99%

Multi-phase simulation of proton exchange membrane fuel cell with 3D fine mesh flow field

et al. 2018

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Summary A three‐dimensional (3D) multi‐phase numerical model of proton exchange membrane fuel cell (PEMFC) is built. The catalyst layer (CL) spherical agglomerate model is used to replace traditional homogenous model, which can predict the concentration loss in PEMFC more accurately. Utilizing this multi‐phase model, the PEMFC with 3D fine mesh flow field is investigated at length, and the liquid water distribution in 3D flow field is qualitatively compared with the experimental image in previous literature. It is found that the 3D fine mesh flow field can improve the reactant gas supply from flow field to porous electrodes significantly and facilitate liquid water removal in PEMFC simultaneously. Therefore, it reduces the concentration loss of PEMFC effectively without increasing the pumping power loss thanks to the greatly increased mass transfer area between gas diffusion layer (GDL) and flow field and vertical flow design of hydrogen and air, which also make the reaction rate distribution in CL more uniform. However, the decreased contact area between GDL and bipolar plate in 3D flow field may decrease PEMFC performance at the current densities where ohmic loss is dominated, but its effect is insignificant.

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Section: Introductionmentioning

confidence: 99%

Multi-phase simulation of proton exchange membrane fuel cell with 3D fine mesh flow field

et al. 2018

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“…Fontana et al used the volume of fluid method to study liquid water transport behaviors in a tapered flow channel based on a 2D dynamic model, and Mancusi et al further investigated the influence of the taper angle with a 3D fuel cell model, and both studies found that the tapered flow channel significantly influences liquid water transport and removal in the flow channel. Liu et al emphasized that the volume of fluid method is mainly used to investigate liquid water dynamics, and comprehensive model that contains complex interfacial phenomena and large physical size should be further studied in PEM fuel cell. And they further developed a visualization equipment to observe the two‐phase flow in the flow channel during the mode switching of fuel cell.…”

Section: Introductionmentioning

confidence: 99%

Influence of sloping baffle plates on the mass transport and performance of PEMFC

et al. 2018

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Summary Sloping baffle plates are installed numerically in the flow channel of proton exchange membrane fuel cell (PEMFC) to promote the mass transport in the porous electrode and the fuel cell performance. The sloping angle of baffle plate on the mass transport and performance of PEMFC are investigated and optimized. The numerical results show that the sloping angle of baffle plate influences the velocity distribution, flow resistance in the flow channel, and the intensity of mass transport between the channel and porous electrode. Larger sloping angle increases the velocity in the vertical direction which brings stronger squeeze effect between the channel and porous electrode, but it also reduces the squeeze area and increases the flow resistance. An optimization for the sloping angle of baffle plate is carried out. The baffle plate with the sloping angle of 45° shows the best performance in PEMFC net power considering the pumping power caused by the pressure loss. The effect of the baffle plate number is also investigated and optimized. The fuel cell current density increases with the baffle plate number, but the increment rate is decreased. The pumping power increases almost linearly with the baffle plate number. The PEMFC with six sloping baffle plates installed in the channel is found to be optimal in terms of the net power.

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“…As the solar cell can work again in sufficient of solar energy, the cell is switched from discharging to charging mode for accumulating hydrogen energy and for lifetime support. Occupying superiorities of low emission and being free from self‐discharge, researches on URFCs are ulteriorly expanded in terrestrial applications, such as renewable energy, portable power supply, and electric vehicle.…”

Section: Introductionmentioning

confidence: 99%

Heat and mass transfer in a unitized regenerative fuel cell during mode switching

Guo

et al. 2018

Int J Energy Res

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Summary With the occurrence of reversible electrochemical reactions, mode switching considerably affects the electric performance of unitized regenerative fuel cells (URFCs) owing to the complicated mass and heat transfer. Although limited researches have been done, no such studies on mass and heat transfer through a three‐dimensional view are envisioned during mode switching. A three‐dimensional full‐cell model was developed and validated to study the dynamic characteristics of a proton exchange membrane‐based URFC during mode switching. Mode switching was performed by changing operation voltage from 0.60 to 1.65 V. Results showed that species and heat transfer affect the electric performance of the cell during mode switching, especially through the third dimensional. Local water starvation occurs on oxygen side catalyst layer and thus results in slight reduction on current density and hydrogen generation. Restricted to heat transfer capacity through ribs, heat transfer process adds total response time in URFCs. Heat flux and surface heat transfer coefficient are forecasted on the hydrogen and oxygen sides. A total time of 4 seconds is essential for URFC reaching a new relative balanced state.

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Interfacial Phenomena and Heat Transfer in Proton Exchange Membrane Fuel Cells

Cited by 38 publications

References 268 publications

Multi-phase simulation of proton exchange membrane fuel cell with 3D fine mesh flow field

Multi-phase simulation of proton exchange membrane fuel cell with 3D fine mesh flow field

Influence of sloping baffle plates on the mass transport and performance of PEMFC

Heat and mass transfer in a unitized regenerative fuel cell during mode switching

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