TY - JOUR
T1 - Modeling and analysis of water vapor dynamics in high-temperature proton exchange membrane fuel cell coupling gas-crossover phenomena
AU - Zhang, Caizhi
AU - Zhang, Jun
AU - Liu, Quanneng
AU - Cai, Lang
AU - Ni, Meng
AU - Zeng, Tao
AU - Liang, Cheng
N1 - Funding Information:
This work is supported in part by the National Natural Science Foundation of China ( 51806024 ), the Technological Innovation and Application Demonstration in Chongqing (Major Themes of Industry: cstc2019jscx-fxyd0158 , cstc2019jscx-zdztzxX0033 ). M. Ni thanks the grants ( PolyU 152064/18E ) from Research Grant Council, University Grants Committee , Hong Kong SAR.
Publisher Copyright:
© 2022 Hydrogen Energy Publications LLC
PY - 2022
Y1 - 2022
N2 - A 3-D numerical model coupling gas-crossover phenomena for high-temperature proton exchange membrane fuel cell (HT-PEMFC) is developed to investigate the water vapor behavior. After model validation, sensitivity analysis of the water vapor diffusion coefficient is carried out, which does not further affect the water vapor behavior, when the order of magnitude of diffusion coefficient is higher than 10−5m2/s. It is also found that the water vapor transport flux decreases with increasing membrane thickness. However, the flux increases slightly with increasing the catalyst layer. In addition, Increasing the pressure and humidity on the anode side will cause water vapor to diffuse from the anode to the cathode, while increasing the current density or the pressure of cathode, the rate of water vapor transport from the cathode to the anode is enhanced. In the dead-end mode, the accumulation of water vapor at the anode outlet is the main cause for the reversible performance decline, which can be restored through reasonable purge strategies. This work contributes to improve the water management strategy of HT-PEMFC operating in dead-end mode.
AB - A 3-D numerical model coupling gas-crossover phenomena for high-temperature proton exchange membrane fuel cell (HT-PEMFC) is developed to investigate the water vapor behavior. After model validation, sensitivity analysis of the water vapor diffusion coefficient is carried out, which does not further affect the water vapor behavior, when the order of magnitude of diffusion coefficient is higher than 10−5m2/s. It is also found that the water vapor transport flux decreases with increasing membrane thickness. However, the flux increases slightly with increasing the catalyst layer. In addition, Increasing the pressure and humidity on the anode side will cause water vapor to diffuse from the anode to the cathode, while increasing the current density or the pressure of cathode, the rate of water vapor transport from the cathode to the anode is enhanced. In the dead-end mode, the accumulation of water vapor at the anode outlet is the main cause for the reversible performance decline, which can be restored through reasonable purge strategies. This work contributes to improve the water management strategy of HT-PEMFC operating in dead-end mode.
KW - Gas-crossover phenomena
KW - HT-PEMFC
KW - Purge process
KW - Water vapor transportation and distribution
UR - http://www.scopus.com/inward/record.url?scp=85129976357&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2022.04.001
DO - 10.1016/j.ijhydene.2022.04.001
M3 - Journal article
AN - SCOPUS:85129976357
SN - 0360-3199
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
ER -