Development of a PEFC with serpentine hybrid pattern gas channels (1st report, design and performance of the PEFC)

Toshiaki Konomp, Tatsumi Kitahara, Hironori Nakajima, Yasutaka Takazono

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We have developed hybrid pattern gas channel consisting of high and low pressure gas channels for polymer electrolyte fuel cells (PEFCs). The pressure difference between them gives rise to in-plane flow in the gas diffusion layer (GDL) under the rib. This hybrid pattern gas channel allows to configure both parallel and serpentine gas channels for the high pressure channels. The low pressure channel is a serpentine gas channel to improve water exhaust ability by its large flow velocity. By taking advantage of the hybrid pattern gas channels, stability of the cell voltage is improved by increase in the flow velocity of the high pressure gas channel when it is switched to the serpentine gas channel. Moreover, atmospheric air introduced into the low pressure gas channel without humidification can dry and exhaust product water extruded to the GDL under the low pressure gas channel. However, flow rate of this air should be optimized to avoid output voltage drop due to the drying of the membrane electrode assembly.

Original languageEnglish
Pages (from-to)569-576
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume75
Issue number752
Publication statusPublished - Apr 2009

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fuel cells
Fuel cells
Electrolytes
electrolytes
polymers
Polymers
Gases
gases
low pressure
Diffusion in gases
gaseous diffusion
flow velocity
Flow velocity
Air
air
electric potential
Water
Drying
water
drying

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

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abstract = "We have developed hybrid pattern gas channel consisting of high and low pressure gas channels for polymer electrolyte fuel cells (PEFCs). The pressure difference between them gives rise to in-plane flow in the gas diffusion layer (GDL) under the rib. This hybrid pattern gas channel allows to configure both parallel and serpentine gas channels for the high pressure channels. The low pressure channel is a serpentine gas channel to improve water exhaust ability by its large flow velocity. By taking advantage of the hybrid pattern gas channels, stability of the cell voltage is improved by increase in the flow velocity of the high pressure gas channel when it is switched to the serpentine gas channel. Moreover, atmospheric air introduced into the low pressure gas channel without humidification can dry and exhaust product water extruded to the GDL under the low pressure gas channel. However, flow rate of this air should be optimized to avoid output voltage drop due to the drying of the membrane electrode assembly.",
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AU - Konomp, Toshiaki

AU - Kitahara, Tatsumi

AU - Nakajima, Hironori

AU - Takazono, Yasutaka

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