Experimental study on the purge process of a proton exchange membrane fuel cell stack with a dead-end anode

Jian, Qifei; Luo, Lizhong; Huang, Bi; Zhao, Jing; Cao, Songyang; Huang, Zhiming

doi:10.1016/j.applthermaleng.2018.07.001

Cited by 38 publications

(7 citation statements)

References 31 publications

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“…Han et al [34] designed, fabricated, and tested a 15-kW H2/air PEMFC stack by controlling the purge valve to remove water and recycle hydrogen instead of using hydrogen recirculation devices, achieving a fuel utilization more than 99.6%. A dead-ended anode is implemented in a study by Jian et al [35] to investigate the effectiveness of gas purging to enhance stack performance. They assembled a PEMFC stack by connecting 40 cells with an active area of 68.5 cm 2 while ambient air with a relative humidity of 64% and a temperature of 21°C was provided to the stack with a fan.…”

Section: Introductionmentioning

confidence: 99%

A breakthrough hydrogen and oxygen utilization in a H2-O2 PEMFC stack with dead-ended anode and cathode

Fan

Xing

et al. 2021

Energy Conversion and Management

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Section: Introductionmentioning

confidence: 99%

A breakthrough hydrogen and oxygen utilization in a H2-O2 PEMFC stack with dead-ended anode and cathode

Fan

Xing

et al. 2021

Energy Conversion and Management

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“…However, gas purging has been found to be the most effective method for removing water from a PEMFC with a dead-ended anode or cathode. 24 The instantaneous pressure difference generated by the sudden opening of the exhaust valve can sweep the liquid water out of the flow channel. The effects of gas purging on water management have been investigated through both experiments and numerical simulations.…”

Section: Introductionmentioning

confidence: 99%

“…The previously mentioned methods were mainly used to remove the excess water in an open‐ended PEMFC. However, gas purging has been found to be the most effective method for removing water from a PEMFC with a dead‐ended anode or cathode 24 . The instantaneous pressure difference generated by the sudden opening of the exhaust valve can sweep the liquid water out of the flow channel.…”

Section: Introductionmentioning

confidence: 99%

Effect of gas purging on the performance of a proton exchange membrane fuel cell with dead‐ended anode and cathode

Shen

Chan

2021

Intl J of Energy Research

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Water management is an important issue to be addressed to maintain the stable and efficient operation of a proton exchange membrane fuel cell (PEMFC).Gas purging is commonly performed to remove accumulated water in a PEMFC, especially in a dead-ended fuel cell system. A 3D dynamic model with a user-defined inlet boundary condition is proposed to study the effect of gas purging with different purge durations in an H 2 /O 2 PEMFC. The results show that the performance immediately deteriorates and then recovers to the original level during gas purging. Purging has a significant effect on the flow and mass transfer in the flow channel, and it leads to efficient removal of water from the PEMFC. The voltage variation tendency is consistent with the water content of the membrane. Membrane dehydration is the main reason for the performance degradation. Notable variations could be observed with increments in the purge duration. Water in a PEMFC is more sensitive and responsive to changes of operating conditions than the reactants. In addition, the performance is significantly deteriorated at a higher operating temperature. A large amount of water is removed during the gas purging, resulting in low water content in the membrane and low water saturation at the interface between the flow channel and the gas diffusion layer.

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“…Limited by existing experimental conditions, most of the research on anode purge is from a micro perspective, studying the effect of anode purge on the output voltage and temperature of PEMFC. Luo et al 14 proposed a step‐by‐step optimization method by studying the current density and output voltage of PEMFC under different purge intervals and purge times. This optimization method can ensure the stability of the output voltage under different current densities.…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis of internal reactants and water content distribution during anode purge in a proton‐exchange membrane fuel cell

et al. 2021

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Summary For proton‐exchange membrane fuel cell, anode purge is a commonly used method to increase utilization rate of hydrogen and proton‐exchange membrane fuel cell durability. Limited by experiment condition, it is hard to analyze reactants and water content distribution in fuel cell during purge. This article uses transient simulation to dynamic analyze distribution of reactants and water content in a full flow field fuel cell (active area 82.14 cm2) with serpentine flow field during purge. From simulation result, it is found that corresponding structures relationship of anode and cathode flow channel causes reactants fluctuating greatly. The direction of water transport across membrane is not fixed. The transmission direction is also affected by local water content of anode and cathode. Dynamic analysis of purge is divided into three stages: purge interval, purging and after purge. During purge interval, water content increases with time. During purging, water content decreases with time in inlet and outlet sections, but in serpentine section water content still increases with time. During after purge, water content increases with time, except inlet section. After multiple purge, purge has little influence on hydrogen distribution in anode flow channel, but value of hydrogen mass fraction increases and increase magnitude gradually decreases, finally reach dynamic equilibrium.

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Experimental study on the purge process of a proton exchange membrane fuel cell stack with a dead-end anode

Cited by 38 publications

References 31 publications

A breakthrough hydrogen and oxygen utilization in a H2-O2 PEMFC stack with dead-ended anode and cathode

A breakthrough hydrogen and oxygen utilization in a H2-O2 PEMFC stack with dead-ended anode and cathode

Effect of gas purging on the performance of a proton exchange membrane fuel cell with dead‐ended anode and cathode

Dynamic analysis of internal reactants and water content distribution during anode purge in a proton‐exchange membrane fuel cell

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