3619 Study on Freezing Phenomenon in Polymer Electrolyte Fuel Cell below Freezing

Nakamiya, H.; Kikuta, Kazusige; Tabe, Yutaka; Chikahisa, Takemi; Kagami, Fumio; Yoshizawa, Koudai

doi:10.1299/jsmemecjo.2005.3.0_275

Cited by 2 publications

(2 citation statements)

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“…However, the water behavior of the generated water below freezing point was not investigated. Nakamiya et al [ 2] discusses that many ice particles formed on the catalyst layer surface when they took apart a fuel cell and observed the catalyst layer surface after cold start. However, they described that details about the freezing mechanism were still unknown.…”

Section: Introductionmentioning

confidence: 99%

Behavior of Water below the Freezing Point in PEFCs

Ishikawa

Morita²,

Shiozawa

2006

ECS Trans.

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This study investigates the phenomenon of water freezing below the freezing point in polymer electrolyte fuel cells (PEFCs). To perform in-situ observation of the fuel cell, a system capable of simultaneously observing inside the fuel cell with visible and infrared images was developed. Liquid water transportation was confirmed at -10ºC when remaining water was purged enough inside the fuel cell before cold starting. The water generated on the gas diffusion layer expanded inside the gas flow channel with the water temperature at approximately -10ºC. Upon freezing, the water temperature rose significantly. This result indicates that the water is in a super-cooled state. Based on these results, it is confirmed that it is possible to generate a fuel cell maintaining water in a super-cooled state and that fuel cell performance is dramatically improved by keeping the water in such a state.

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Section: Introductionmentioning

confidence: 99%

Behavior of Water below the Freezing Point in PEFCs

Ishikawa

Morita²,

Shiozawa

2006

ECS Trans.

View full text Add to dashboard Cite

show abstract

“…However, the freezing temperature of the generated water below the freezing point has not been investigated. Nakamiya et al 2 described that many ice particles existed on the catalyst layer surface when they took apart a fuel cell and observed the catalyst layer surface after power generation below the freezing point. However, they discussed that details about the freezing mechanism are still unknown.…”

mentioning

confidence: 99%