Abstract
In a passive type PEMFC system, axial fans operate to supply both oxidant and coolant to cathode side of the stack by using ambient air. It is possible to make simple system, because a passive type PEMFC does not use additional cooling equipment or humidifier. However, the cooling performance of the air-cooling system is lower than the cooling system which uses water as coolant. To ensure the system reliability, an optimized stack cooling strategy is necessary. In this study, simulation has been done to find best cooing strategy. We adopted various channel configuration and graded air flow rate distribution at the cathode side and external heat transfer coefficient. In addition, we observed the water distribution at the MEA of each cell to understand the dry-out phenomenon. five channel air-cooling PEMFC stack was developed and investigated. The cell with thick rib width channel and even air flow rate distribution shows better cooling performance. In addition, the amount of water inside the center unit cell MEA is significantly reduced by the overheating.
| Original language | English |
|---|---|
| Title of host publication | 5th Asian Conference on Refrigeration and Air Conditioning, ACRA 2010 - Green Breeze from Asia: Frontiers of Refrigerants, Heat Transfer and System |
| Publisher | Japan Society of Refrigeration and Air Conditioning Engineering (JSRAE) |
| ISBN (Print) | 9781634391252 |
| Publication status | Published - 2010 Jan 1 |
| Event | 5th Asian Conference on Refrigeration and Air Conditioning - Green Breeze from Asia: Frontiers of Refrigerants, Heat Transfer and System, ACRA 2010 - Tokyo, Japan Duration: 2010 Jun 7 → 2010 Jun 9 |
Other
| Other | 5th Asian Conference on Refrigeration and Air Conditioning - Green Breeze from Asia: Frontiers of Refrigerants, Heat Transfer and System, ACRA 2010 |
|---|---|
| Country | Japan |
| City | Tokyo |
| Period | 10/6/7 → 10/6/9 |
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ASJC Scopus subject areas
- Engineering(all)
- Environmental Engineering
Cite this
A numerical study on the characteristics of cooling and water distribution of a passive type PEMFC stack. / Lee, Jaehyuk; Kim, Bosung; Kim, Yong Chan; Lee, Yongtaek.
5th Asian Conference on Refrigeration and Air Conditioning, ACRA 2010 - Green Breeze from Asia: Frontiers of Refrigerants, Heat Transfer and System. Japan Society of Refrigeration and Air Conditioning Engineering (JSRAE), 2010.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - A numerical study on the characteristics of cooling and water distribution of a passive type PEMFC stack
AU - Lee, Jaehyuk
AU - Kim, Bosung
AU - Kim, Yong Chan
AU - Lee, Yongtaek
PY - 2010/1/1
Y1 - 2010/1/1
N2 - In a passive type PEMFC system, axial fans operate to supply both oxidant and coolant to cathode side of the stack by using ambient air. It is possible to make simple system, because a passive type PEMFC does not use additional cooling equipment or humidifier. However, the cooling performance of the air-cooling system is lower than the cooling system which uses water as coolant. To ensure the system reliability, an optimized stack cooling strategy is necessary. In this study, simulation has been done to find best cooing strategy. We adopted various channel configuration and graded air flow rate distribution at the cathode side and external heat transfer coefficient. In addition, we observed the water distribution at the MEA of each cell to understand the dry-out phenomenon. five channel air-cooling PEMFC stack was developed and investigated. The cell with thick rib width channel and even air flow rate distribution shows better cooling performance. In addition, the amount of water inside the center unit cell MEA is significantly reduced by the overheating.
AB - In a passive type PEMFC system, axial fans operate to supply both oxidant and coolant to cathode side of the stack by using ambient air. It is possible to make simple system, because a passive type PEMFC does not use additional cooling equipment or humidifier. However, the cooling performance of the air-cooling system is lower than the cooling system which uses water as coolant. To ensure the system reliability, an optimized stack cooling strategy is necessary. In this study, simulation has been done to find best cooing strategy. We adopted various channel configuration and graded air flow rate distribution at the cathode side and external heat transfer coefficient. In addition, we observed the water distribution at the MEA of each cell to understand the dry-out phenomenon. five channel air-cooling PEMFC stack was developed and investigated. The cell with thick rib width channel and even air flow rate distribution shows better cooling performance. In addition, the amount of water inside the center unit cell MEA is significantly reduced by the overheating.
KW - Air flow rate
KW - Cooling performance
KW - Passive type PEMFC
KW - Temperature distribution
KW - Water distribution
UR - http://www.scopus.com/inward/record.url?scp=84914674833&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84914674833&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84914674833
SN - 9781634391252
BT - 5th Asian Conference on Refrigeration and Air Conditioning, ACRA 2010 - Green Breeze from Asia: Frontiers of Refrigerants, Heat Transfer and System
PB - Japan Society of Refrigeration and Air Conditioning Engineering (JSRAE)
ER -