Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | ECS Transactions |
| Herausgeber (Verlag) | American Institute of Physics |
| Seiten | 227-240 |
| Seitenumfang | 14 |
| Auflage | 9 |
| ISBN (elektronisch) | 9781607685395 |
| Publikationsstatus | Veröffentlicht - 2022 |
| Veranstaltung | 242nd ECS Meeting - Atlanta, USA / Vereinigte Staaten Dauer: 9 Okt. 2022 → 13 Okt. 2022 |
Publikationsreihe
| Name | ECS Transactions |
|---|---|
| Nummer | 9 |
| Band | 109 |
| ISSN (Print) | 1938-6737 |
| ISSN (elektronisch) | 1938-5862 |
Abstract
PEM fuel cell systems in automotive applications must provide a low minimum power compared to their maximum power. Especially systems without external humidification require a rather low stoichiometry and elevated pressure at the cathode to avoid dry-out at low load operation. Targeted experiments show that this may cause flooding, as the gas velocity becomes too low for sufficient liquid water drainage. An increase of the gas velocity would cause a membrane dry-out, negatively impacting the cells performance and lifetime. One solution for this issue is proposed in this work: a dynamic operation of the air system, which is periodically switched between one set point for membrane humidification and another one for liquid water drainage. A sophisticated experimental fuel cell system is used to test the proposed solution on a 100kW stack.
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ECS Transactions. 9. Aufl. American Institute of Physics, 2022. S. 227-240 (ECS Transactions; Band 109, Nr. 9).
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Flooding Characteristics and Countermeasures in a PEM Fuel Cell System
AU - Breitinger, Jonas
AU - Hellmann, Mark
AU - Kemmer, Helerson
AU - Kabelac, Stephan
N1 - Funding Information: The support of the testing team during the experimental campaigns is gratefully acknowledged.
PY - 2022
Y1 - 2022
N2 - PEM fuel cell systems in automotive applications must provide a low minimum power compared to their maximum power. Especially systems without external humidification require a rather low stoichiometry and elevated pressure at the cathode to avoid dry-out at low load operation. Targeted experiments show that this may cause flooding, as the gas velocity becomes too low for sufficient liquid water drainage. An increase of the gas velocity would cause a membrane dry-out, negatively impacting the cells performance and lifetime. One solution for this issue is proposed in this work: a dynamic operation of the air system, which is periodically switched between one set point for membrane humidification and another one for liquid water drainage. A sophisticated experimental fuel cell system is used to test the proposed solution on a 100kW stack.
AB - PEM fuel cell systems in automotive applications must provide a low minimum power compared to their maximum power. Especially systems without external humidification require a rather low stoichiometry and elevated pressure at the cathode to avoid dry-out at low load operation. Targeted experiments show that this may cause flooding, as the gas velocity becomes too low for sufficient liquid water drainage. An increase of the gas velocity would cause a membrane dry-out, negatively impacting the cells performance and lifetime. One solution for this issue is proposed in this work: a dynamic operation of the air system, which is periodically switched between one set point for membrane humidification and another one for liquid water drainage. A sophisticated experimental fuel cell system is used to test the proposed solution on a 100kW stack.
UR - http://www.scopus.com/inward/record.url?scp=85140259799&partnerID=8YFLogxK
U2 - 10.1149/10909.0227ecst
DO - 10.1149/10909.0227ecst
M3 - Conference contribution
AN - SCOPUS:85140259799
T3 - ECS Transactions
SP - 227
EP - 240
BT - ECS Transactions
PB - American Institute of Physics
T2 - 242nd ECS Meeting
Y2 - 9 October 2022 through 13 October 2022
ER -