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Water vapor exchange system installed in a polymer electrolyte fuel cell to enhance the performance without humidification
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- KITAHARA Tatsumi
- Department of Mechanical Engineering, Kyushu University International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University
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- NAKAJIMA Hironori
- Department of Mechanical Engineering, Kyushu University International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University
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- TSUDA Kazuto
- Graduate School of Engineering, Kyushu University
Bibliographic Information
- Other Title
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- PEFC無加湿運転時の発電性能向上のためのセル内部湿度交換システムに関する研究
Description
Polymer electrolyte fuel cells (PEFCs) generally have external humidifiers to supply humidified hydrogen and oxidant gases, preventing dehydration of the membrane electrode assembly (MEA). If a PEFC could be operated without humidification, external humidifiers may be removed, resulting in a very simplified PEFC system with increased total efficiency and reduced cost. One of most important issues to advance the commercial viability of PEFCs is to develop high performance PEFCs that can operate without humidification. In the present study, a water vapor exchange system installed in the cell was developed to enhance the PEFC performance without humidification. A gas diffusion layer coated with a hydrophilic microporous layer, which consists of carbon black and polyvinyl alcohol (PVA), used at the cathode exchange area increases water transport from the wet cathode outlet gas to the dry anode inlet gas. This prevents dehydration of the MEA, thereby reducing the IR (ohmic) overpotential. The exchange area using interdigitated flow channels is effective to achieve further enhancement of water transport from the cathode to the anode, which significantly enhances the ability to prevent dehydration of the MEA. This results in a much higher output power density compared with that for a PEFC without the water vapor exchange area.
Journal
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- Transactions of the JSME (in Japanese)
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Transactions of the JSME (in Japanese) 80 (820), TEP0363-TEP0363, 2014
The Japan Society of Mechanical Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1390001205515197312
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- NII Article ID
- 130005004958
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- ISSN
- 21879761
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- Text Lang
- ja
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- Article Type
- journal article
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
- OpenAIRE
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- Abstract License Flag
- Disallowed