Dynamic response of proton exchange membrane fuel cell under mechanical vibration

Wang, Xueke; Wang, Shubo; Chen, Sitong; Zhu, Tong; Xie, Xiang; Mao, Zhiming

doi:10.1016/j.ijhydene.2016.06.082

Cited by 35 publications

(11 citation statements)

References 25 publications

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“…Cho et al also pointed out that PEMFC demonstrated better load changing performance with the deeper microporous layer 16,17 . Wang et al suggested that the vibration operation condition could enhance the discharge of accumulated water during the actual operation of PEMFC, improving the load changing performance 18 …”

Section: Introductionmentioning

confidence: 99%

Load changing characteristics of the hydrogen‐air and hydrogen‐oxygen proton exchange membrane fuel cells

Huang

Xing

2021

Intl J of Energy Research

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Summary Load changing performance is significant for the application of proton exchange membrane fuel cells (PEMFCs). This paper compares experimental results of the hydrogen‐air and hydrogen‐oxygen PEMFC and analyzes their dynamic performance under various operating conditions. We use electrochemical impedance spectroscopy to investigate the intrinsic mechanism during load changing. Due to the higher oxygen concentration, the hydrogen‐oxygen PEMFC responds faster (within 1 second) and operates more steadily than the hydrogen‐air PEMFC (2‐20 seconds). The experimental results show that the total polarization resistance of the hydrogen‐air PEMFC and the Ohmic resistance of the hydrogen‐oxygen PEMFC decrease dramatically with the appropriately increased operating temperature. Whereas at over‐elevated operating temperature, the resistance value increases due to the dehydration of the membrane electrode assembly. Load changing performance can be improved by increasing operating pressure and relative humidity. Increased stoichiometry is beneficial for the hydrogen‐air PEMFC, while the opposite trend is observed for the hydrogen‐oxygen PEMFC. Novelty statement Comparison of experimental results of hydrogen‐air and hydrogen‐oxygen proton exchange membrane fuel cell (PEMFC), dynamic performance at start‐up, and load changing performance are studied. Two PEMFCs' performances are quite different at various operating conditions. Overall, H2/O2 PEMFCs response faster (1 second) and operate more steadily than H2‐air (2‐20 seconds). Ohmic, polarization, and mass transfer resistance values are measured and analyzed.

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Section: Introductionmentioning

confidence: 99%

Load changing characteristics of the hydrogen‐air and hydrogen‐oxygen proton exchange membrane fuel cells

Huang

Xing

2021

Intl J of Energy Research

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“…Also, the leak rate has been tested to optimize the design. Wang et al investigated the dynamic response of PEMFC with a vibration platform. The author held that the sudden vibration might promote the coalescence of the small water droplets to larger ones.…”

Section: Introductionmentioning

confidence: 99%

Water transport in the gas diffusion layer of proton exchange membrane fuel cell under vibration conditions

Jiao

Niu

et al. 2020

Int J Energy Res

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Summary Fuel cell vehicles face complicated road conditions, which may impact on the output performance of fuel cell stacks. In the present study, the water transport in the gas diffusion layer (GDL) of proton exchange membrane fuel cell (PEMFC) under vibration conditions are investigated. A stochastic method is employed to reconstruct the 3‐D GDL with experimentally validated varying porosities. The volume of fluid (VOF) method is adopted to investigate the two‐phase problems. Sinusoidal vibration source terms are superposed, which can vary with required amplitudes and directions. Over time, the water transport process takes three steps: water intrusion, water accumulation, and water removal. The water intrusion tends to start from the sides of the GDL, then spreads into the central area. Compared with the no‐vibration case, the water saturations are higher in both the vertical and horizontal vibration cases. The vibration will enhance the water transport through GDL layers. As such, the higher the vibration amplitude and frequency, the larger the water saturation. Accordingly, the water saturation of the GDL vary sinusoidally over time. The water breakthrough paths are identified and compared during the water removal processes. Vibration in the horizontal direction is much easier to promote the water transport inside a layer compared with vibration in the vertical direction. More substantial water saturation in the GDL layers will restrict the gas transfer paths. Consequently, less oxygen will participate in the reaction, which will further impact on the fuel cell performance.

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“…To build a competitive, secure and sustainable clean-energy economy, the proton exchange membrane fuel cells (PEMFCs), which convert hydrogen fuel directly into electricity without combustion, have become an alternative solution to energy depletion and environmental issues [ 1 , 2 , 3 , 4 ]. Due to PEMFC’s numerous strengths, including low operating temperatures, zero-emission, rapid response, high efficiency and power density, its commercialization process is vigorously promoted worldwide [ 5 , 6 , 7 ]. Nevertheless, there are still some obstacles to restrict its large-scale application; one of them is cold start failure, which is one of the thermal management issues of PEMFC.…”

Section: Introductionmentioning

confidence: 99%

Microencapsulated Phase Change Material Suspension for Cold Start of PEMFC

Chen

Wang

et al. 2021

Materials

Self Cite

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We added microencapsulated phase change materials (MPCMs) into the homemade antifreeze fluid to take advantage of the latent heat of phase change materials, and explored the possibility of solving the cold start problem of proton exchange membrane fuel cells (PEMFC) with variable specific heat capacity antifreeze. The physical and chemical properties of the MPCMs and their suspensions were tested, and a PEMFC platform for cold start with a thermal management system was established to compare the exothermic performance of MPCS and commercial antifreeze fluid. According to the output voltage, temperature and polarization curves before and after cold start, the MPCMs has a stronger heat transfer capacity than the commercial antifreeze fluid, and the addition of MPCMs can transform the latent heat generated during the phase transition into apparent specific heat capacity, leading to a better solution to the problem of PEMFC cold start.

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Dynamic response of proton exchange membrane fuel cell under mechanical vibration

Cited by 35 publications

References 25 publications

Load changing characteristics of the hydrogen‐air and hydrogen‐oxygen proton exchange membrane fuel cells

Load changing characteristics of the hydrogen‐air and hydrogen‐oxygen proton exchange membrane fuel cells

Water transport in the gas diffusion layer of proton exchange membrane fuel cell under vibration conditions

Microencapsulated Phase Change Material Suspension for Cold Start of PEMFC

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