Numerical simulation on purge strategy of proton exchange membrane fuel cell with dead-ended anode

Chen, Ben; Zhou, Heng; He, Songbai; Meng, Kai; Liu, Yang; Cai, Yonghua

doi:10.1016/j.energy.2021.121265

Cited by 55 publications

(6 citation statements)

References 45 publications

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“…21 The water accumulated can be purged by controlling the periodic switch of the anode outlet solenoid valve, thus reducing water flooding. 22 Chen et al 23 investigated the gas purging effect on the degradation characteristic of a PEMFC with DEA mode. The surface micromorphology of the membrane and the electrochemical performance of the catalyst after continuous purging operation of the fuel cell have also been studied.…”

Section: ■ Introductionmentioning

confidence: 99%

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Catalyst Degradation Mitigation and Fuel Utilization Enhancement of a Dead-Ended Anode and Cathode Proton Exchange Membrane Fuel Cell with Periodical Oxygen Supply

Liu

Chan

2022

ACS Sustainable Chem. Eng.

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Hydrogen−oxygen proton exchange membrane fuel cells (PEMFCs) have promising military applications. However, carbon corrosion in the catalyst layer induced by water flooding significantly affects the performance and longevity of PEMFCs. In this study, a periodical oxygen supply strategy is proposed to improve water management in PEMFCs. The hydrogen and oxygen utilization reached 99.84 and 98.82%, respectively. The performance degradation rate of a PEMFC with a current density of 600 mA•cm −2 decreased by 45.1% under the proposed strategy. According to morphological results, the thickness degradation rate of the cathode catalyst layer operating in the proposed strategy is generally lower than that in the conventional dead-ended mode, which was mainly due to the irreversible Pt agglomeration, oxidation, and carbon support corrosion, especially in the oxygen outlet area. This work contributes to the engineering application of H 2 /O 2 PEMFCs by providing a deeper understanding of dead-ended behaviors.

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Section: ■ Introductionmentioning

confidence: 99%

“…The anode outlet of the PEMFC is usually discharged periodically in the dead-ended mode . The water accumulated can be purged by controlling the periodic switch of the anode outlet solenoid valve, thus reducing water flooding . Chen et al investigated the gas purging effect on the degradation characteristic of a PEMFC with DEA mode.…”

Section: Introductionmentioning

confidence: 99%

Catalyst Degradation Mitigation and Fuel Utilization Enhancement of a Dead-Ended Anode and Cathode Proton Exchange Membrane Fuel Cell with Periodical Oxygen Supply

Liu

Chan

2022

ACS Sustainable Chem. Eng.

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“…Therefore, most of the research on HT-PEMFCs is performed with non-humidified gas. However, water vapor will diffuse from cathode to anode or from anode to cathode in the form of vapor due to the concentration difference and pressure difference between anode and cathode [8].…”

Section: Introductionmentioning

confidence: 99%

Modeling and analysis of water vapor dynamics in high-temperature proton exchange membrane fuel cell coupling gas-crossover phenomena

Zhang

Liu

et al. 2022

International Journal of Hydrogen Energy

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“…Previously, we used CFD model to study the PEMFC with dead‐ended anode. The results showed that the rate of nitrogen permeation increased with the increase of membrane water content; The purge duration is directly related to the cell temperature 33 . Ding et al 34 simulated the transmission of water in GDL and membrane during purge, and studied the effects of relative humidity, flow rate, and temperature on purge emission effect.…”

Section: Introductionmentioning

confidence: 99%

“…The results showed that the rate of nitrogen permeation increased with the increase of membrane water content; The purge duration is directly related to the cell temperature. 33 Ding et al 34 simulated the transmission of water in GDL and membrane during purge, and studied the effects of relative humidity, flow rate, and temperature on purge emission effect. The two purge modes of common flow and countercurrent are compared by Xu et al 35 The simulation results show that countercurrent purge makes the water distribution of the membrane more uniform.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on purge characteristics and purge strategy for PEMFC hydrogen system based on exhaust hydrogen recirculation

Chen

Liu

Chen

et al. 2022

Intl J of Energy Research

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Summary The lumped parameter model of the hydrogen system based on exhaust hydrogen recirculation and the CFD model of PEMFC stack were established in this paper. The system simulation results were used as the input of the stack model. The purge characteristics of the stack were studied and the purge strategy was formulated considering the hydrogen utilization and performance characteristics. The results show that during anode purging, the anode pressure fluctuated significantly and the nitrogen concentration decreased rapidly. The output voltage of the stack fluctuates greatly, and the fluctuation of voltage intensifies with the extension of emission duration. In addition, the voltage fluctuation range of unit cell decreases gradually from inlet to outlet. After the system stabilizes, the component distribution of anode was improved and the stack performance was recovered to the initial state. During the purge interval, the performance of the stack degrades due to the increase of anode nitrogen concentration. The hydrogen utilization rate of the hydrogen system was directly related to the purge strategy, and the purge strategy of short period‐short duration was beneficial to reduce the fluctuation of the stack performance in the purging process, and reduce the differences of performance and component distribution of different single cell.

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Numerical simulation on purge strategy of proton exchange membrane fuel cell with dead-ended anode

Cited by 55 publications

References 45 publications

Catalyst Degradation Mitigation and Fuel Utilization Enhancement of a Dead-Ended Anode and Cathode Proton Exchange Membrane Fuel Cell with Periodical Oxygen Supply

Catalyst Degradation Mitigation and Fuel Utilization Enhancement of a Dead-Ended Anode and Cathode Proton Exchange Membrane Fuel Cell with Periodical Oxygen Supply

Modeling and analysis of water vapor dynamics in high-temperature proton exchange membrane fuel cell coupling gas-crossover phenomena

Numerical study on purge characteristics and purge strategy for PEMFC hydrogen system based on exhaust hydrogen recirculation

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