TY - JOUR
T1 - Evaluation criterion of flow fields in PEM fuel cells based on entropy generation analysis
AU - Ding, Quan
AU - Zhu, Kai-Qi
AU - Xu, Jiang-Hai
AU - Zhang, Ben-Xi
AU - Yang, Yan-Ru
AU - Yang, Chen
AU - Wang, Yu-Lin
AU - Lee, Duu-Jong
AU - Wan, Zhong-Min
AU - Wang, Xiao-Dong
PY - 2023/1/19
Y1 - 2023/1/19
N2 - Two geometrical parameters, amplitude and wavelength, of the structure of the wavy-flow field in a proton exchange membrane fuel cell (PEMFC) were investigated on their impacts on cell performances via a three-dimensional, multiphase, and non-isothermal model. Amplitude and wavelength significantly influence oxygen transport, friction resistance, and current densities in PEMFC operations. The enhancement of current density peaks at an amplitude of 0.4 mm and a wavelength of 2 mm, increased by 10.40% compared to the non-wavy design. The wavy channels would increase the oxygen concentration gradient and the viscous friction, increasing entropy generation. The entropy generation rates increase more significantly at small wavelengths and large amplitudes. The entropy generation ratio (EGR) evaluates the performances of different wavy channels based on the accurate description of oxygen transport in PEMFC without calculating the associated pumping power consumption rates. The EGR decreases with decreasing wavelength or increasing amplitude.
AB - Two geometrical parameters, amplitude and wavelength, of the structure of the wavy-flow field in a proton exchange membrane fuel cell (PEMFC) were investigated on their impacts on cell performances via a three-dimensional, multiphase, and non-isothermal model. Amplitude and wavelength significantly influence oxygen transport, friction resistance, and current densities in PEMFC operations. The enhancement of current density peaks at an amplitude of 0.4 mm and a wavelength of 2 mm, increased by 10.40% compared to the non-wavy design. The wavy channels would increase the oxygen concentration gradient and the viscous friction, increasing entropy generation. The entropy generation rates increase more significantly at small wavelengths and large amplitudes. The entropy generation ratio (EGR) evaluates the performances of different wavy channels based on the accurate description of oxygen transport in PEMFC without calculating the associated pumping power consumption rates. The EGR decreases with decreasing wavelength or increasing amplitude.
KW - Entropy generation analysis
KW - Entropy generation ratio
KW - Mass transport
KW - Proton exchange membrane fuel cell
KW - Wavy channels
UR - http://www.scopus.com/inward/record.url?scp=85143531829&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85143531829&origin=recordpage
U2 - 10.1016/j.ijhydene.2022.10.112
DO - 10.1016/j.ijhydene.2022.10.112
M3 - RGC 21 - Publication in refereed journal
SN - 0360-3199
VL - 48
SP - 2328
EP - 2340
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 6
ER -
