Experimental study of a novel piezoelectric proton exchange membrane fuel cell with nozzle and diffuser

Ma, Hwong‐Wen; Huang, Shih‐Han; Wang, Jyun-Sheng; Hou, Churng-Guang; Yu, Chia Li; Boren, Chen

doi:10.1016/j.jpowsour.2009.09.033

Cited by 23 publications

(14 citation statements)

References 32 publications

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“…[77] Improvement in the excess liquid water evacuation. [85][86][87][88][89][90] Freeze/thaw cycles Unchanged ohmic resistance [99] Reduction in the electrocatalyst surface area (ECSA). [96,97] Increase in the porosity of the electrode.…”

Section: Vibrationmentioning

confidence: 99%

Effects of mechanical compression on the performance of polymer electrolyte fuel cells and analysis through in-situ characterisation techniques - A review

Khetabi

Bouziane

Zamel

et al. 2019

Journal of Power Sources

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One of the factors that affect the polymer electrolyte fuel cell (PEFC) performance is the mechanical compression inside the stack. Although this compression plays an important role to ensure efficient gas sealing along with optimised electrical and thermal conductivities during PEFCs operation, excessive mechanical pressure may worsen the fuel cell performance through reducing the porosity and transport ability of PEFC components. In the last few years, intensive research studies have focused on the gas diffusion layers (GDLs) due to the strong relation of their compressibility with the performance of the PEFCs. A few review papers investigating the compression effect on individual fuel cell components have already been published. However, the evaluation of this effect on an operating PEFC has rarely been reviewed. This paper covers a comprehensive overview of the studies that have focused on the relationship between mechanical compression and the observed performance of a PEFC operating in real life conditions (in-situ). In this study, the effects of GDL properties with respect to the applied mechanical compression and the operating conditions are investigated. Much more work in literature has focused on GDL properties. Thus, an extended discussion is dedicated to this cell element in this paper.

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Section: Vibrationmentioning

confidence: 99%

Effects of mechanical compression on the performance of polymer electrolyte fuel cells and analysis through in-situ characterisation techniques - A review

Khetabi

Bouziane

Zamel

et al. 2019

Journal of Power Sources

View full text Add to dashboard Cite

show abstract

“…The aspect ratio (AR, L/D), diffuser angle (θ), and opening width of the channel (D) are variables in the simulation model shown in Figure 1. The pressure change due to the vibrating PZT actuator was described as a specific user-defined function (UDF) shown in Equation (15) [15]. This UDF was connected to Fluent for the simulation model.…”

Section: Analysis Of Actuation Mechanismmentioning

confidence: 99%

“…Ma et al [14,15] developed a cathode channel design that utilized the piezoelectric effect in air breathing PEMFC systems, known as PZT-PEMFC, and used a nozzle and a diffuser to prevent air backflow without valves. They solved water-flooding problems and improved cell performance.…”

Section: Introductionmentioning

confidence: 99%

A Novel Hybrid Actuator Driven Magnetically in the Bi-Cell PEM Fuel Cell Stack

Hsu

2017

Metals

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This study develops an air breathing pump driven by a piezoelectric actuator for a proton exchange membrane fuel cell (PEMFC) stack. Permanent magnets are combined with a piezoelectric actuator to drive three air breathing pumps using magnetic force. This design enables the pump to provide a sufficient amount of air simultaneously to six cathode flow field plates in a stack of three "bi-cell PZTmag-PEMFCs". When both the PZTmag and the PDMSmag had a magnet with a 6-mm diameter and 1-mm thickness, a maximum amplitude of 87 µm was generated at 0.03 W of power under operating conditions of 70 Hz and 40 V. In computational fluid dynamics (CFD), when the nozzle and the diffuser of an air breathing pump have an aspect ratio of 13.13, air flow distributes uniformly inside the pump, thus allowing for uniform transmission of oxygen to the membrane electrode assembly. This aspect ratio was applied to the bi-cell PZTmag-PEMFC stack and yielded a maximum net power flux of 0.1925 W·cm −2 , 20% higher than that reported in a previous study , with 68% and 76% less volume and weight, respectively.

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“…The PZT‐PEMFC can feed air into the cathode channel through a gas pump with a piezoelectric device structure. Their studies , on a PZT‐PEMFC with a nozzle and diffuser showed that a PZT actuator could solve the water‐flooding problems in a cathode and improve the cell performance. Other studies , have also shown that an improved PZT‐PEMFC cell performance could be obtained by using an aspect ratio ( AR ) of 11.25 and diffuser angle ( θ ) of 5°.…”

Section: Introductionmentioning

confidence: 99%

Development of a Bi‐cell Proton Exchange Membrane Fuel Cell with Optimized Groove‐designed Piezoelectric Actuator

Hsu

Luo

2017

Fuel Cells

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Previous studies demonstrated a piezoelectric proton exchange membrane fuel cell (PZT‐PEMFC) stack design composed of three bi‐cells in series and a single bi‐cell, with a maximum net power density of 0.1608 W cm−2. The present study developed a modified bi‐cell design with lower volume and weight by using gold‐plated aluminum 6061. A groove‐designed PZT actuator enclosed with poly‐di‐methyl‐siloxane (PDMS) curing for 30 min can reduce uneven air feeding. Such an actuator can also improve the performance of both sides of a bi‐cell, with only a 0.7% difference in the open circuit voltage (OCV). The experimental results showed that the net power density of the new version of the single bi‐cell PZT‐PEMFC module was 0.1658 W cm−2.

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Experimental study of a novel piezoelectric proton exchange membrane fuel cell with nozzle and diffuser

Cited by 23 publications

References 32 publications

Effects of mechanical compression on the performance of polymer electrolyte fuel cells and analysis through in-situ characterisation techniques - A review

Effects of mechanical compression on the performance of polymer electrolyte fuel cells and analysis through in-situ characterisation techniques - A review

A Novel Hybrid Actuator Driven Magnetically in the Bi-Cell PEM Fuel Cell Stack

Development of a Bi‐cell Proton Exchange Membrane Fuel Cell with Optimized Groove‐designed Piezoelectric Actuator

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