Details
| Original language | English |
|---|---|
| Article number | 233270 |
| Journal | Journal of power sources |
| Volume | 580 |
| Early online date | 15 Jun 2023 |
| Publication status | Published - 1 Oct 2023 |
Abstract
A good water management is very important for the operation of PEM fuel cell systems as the proton conductivity is dependent on the membrane water content. In contrast to state of the art approaches, this study focuses on an anode based water management approach of fuel cell systems with an anode recirculation loop. The aim of the anode based water management is to reach a high and homogeneously distributed anode humidity without condensation in all relevant operating conditions. A criterion is defined to evaluate the anode humidity distribution. A macroscopic discrete 2D+1D model was developed that can simulate humidity distributions and the cell voltage for various flow directions of the fluids and operating conditions. The model considers the system behavior including the anode recirculation loop. This study shows that flow directions that support an internal water circulation are beneficial for fuel cell systems without external humidification. Furthermore, the study shows a correlation between the anode humidity distribution at the membrane and the cell voltage. The higher the temperature is, the more important is a flow field that supports a high and homogeneously distributed anode humidity.
Keywords
- Anode based water management, Flow directions, Humidity distribution, PEM fuel cell system
ASJC Scopus subject areas
- Energy(all)
- Renewable Energy, Sustainability and the Environment
- Energy(all)
- Energy Engineering and Power Technology
- Chemistry(all)
- Physical and Theoretical Chemistry
- Engineering(all)
- Electrical and Electronic Engineering
Sustainable Development Goals
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In: Journal of power sources, Vol. 580, 233270, 01.10.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Interaction of cell flow directions and performance in PEM fuel cell systems following an anode based water management approach
AU - Grimm, Mirjam
AU - Hellmann, Mark
AU - Kemmer, Helerson
AU - Kabelac, Stephan
N1 - Funding Information: This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
PY - 2023/10/1
Y1 - 2023/10/1
N2 - A good water management is very important for the operation of PEM fuel cell systems as the proton conductivity is dependent on the membrane water content. In contrast to state of the art approaches, this study focuses on an anode based water management approach of fuel cell systems with an anode recirculation loop. The aim of the anode based water management is to reach a high and homogeneously distributed anode humidity without condensation in all relevant operating conditions. A criterion is defined to evaluate the anode humidity distribution. A macroscopic discrete 2D+1D model was developed that can simulate humidity distributions and the cell voltage for various flow directions of the fluids and operating conditions. The model considers the system behavior including the anode recirculation loop. This study shows that flow directions that support an internal water circulation are beneficial for fuel cell systems without external humidification. Furthermore, the study shows a correlation between the anode humidity distribution at the membrane and the cell voltage. The higher the temperature is, the more important is a flow field that supports a high and homogeneously distributed anode humidity.
AB - A good water management is very important for the operation of PEM fuel cell systems as the proton conductivity is dependent on the membrane water content. In contrast to state of the art approaches, this study focuses on an anode based water management approach of fuel cell systems with an anode recirculation loop. The aim of the anode based water management is to reach a high and homogeneously distributed anode humidity without condensation in all relevant operating conditions. A criterion is defined to evaluate the anode humidity distribution. A macroscopic discrete 2D+1D model was developed that can simulate humidity distributions and the cell voltage for various flow directions of the fluids and operating conditions. The model considers the system behavior including the anode recirculation loop. This study shows that flow directions that support an internal water circulation are beneficial for fuel cell systems without external humidification. Furthermore, the study shows a correlation between the anode humidity distribution at the membrane and the cell voltage. The higher the temperature is, the more important is a flow field that supports a high and homogeneously distributed anode humidity.
KW - Anode based water management
KW - Flow directions
KW - Humidity distribution
KW - PEM fuel cell system
UR - http://www.scopus.com/inward/record.url?scp=85163727002&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2023.233270
DO - 10.1016/j.jpowsour.2023.233270
M3 - Article
AN - SCOPUS:85163727002
VL - 580
JO - Journal of power sources
JF - Journal of power sources
SN - 0378-7753
M1 - 233270
ER -