The Influence of Channel Wettability on Two-Phase Flow and Polymer Electrolyte Membrane Fuel Cell Performance

2019 ◽  
Vol 42 (1) ◽  
pp. 109-115 ◽  
Author(s):  
Saher Al Shakhshir ◽  
Yonxin Wang ◽  
Ibrahim E. Alaefour ◽  
Xianguo Li
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Two Phase Flow ◽  
Polymer Electrolyte Membrane ◽  
Cell Performance ◽  
Phase Flow ◽  
Two Phase ◽  
Fuel Cell Performance ◽  
Electrolyte Membrane

scholarly journals Nonisothermal two‐phase modeling of the effect of linear nonuniform catalyst layer on polymer electrolyte membrane fuel cell performance

2020 ◽  
Vol 8 (10) ◽  
pp. 3575-3587
Author(s):  
Seyedali Sabzpoushan ◽  
Hassan Jafari Mosleh ◽  
Soheil Kavian ◽  
Mohsen Saffari Pour ◽  
Omid Mohammadi ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Catalyst Layer ◽  
Cell Performance ◽  
Two Phase ◽  
Fuel Cell Performance ◽  
Electrolyte Membrane

Three dimensional numerical simulation of polymer electrolyte membrane fuel cell

2019 ◽  
Vol 30 (1) ◽  
pp. 427-451
Author(s):  
Yeping Peng ◽  
Ghasem Bahrami ◽  
Hossein Khodadadi ◽  
Alireza Karimi ◽  
Ahmad Soleimani ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Current Density ◽  
Two Phase Flow ◽  
Polymer Electrolyte Membrane ◽  
Phase Flow ◽  
Two Phase ◽  
Content Type ◽  
Electrolyte Membrane

Purpose The purpose of this study is simulation of of polymer electrolyte membrane fuel cell. Proton-exchange membrane fuel cells are promising power sources for use in power plants and vehicles. These fuel cells provide a high level of energy efficiency at low temperature without any pollution. The convection inside the cell plays a key role in the electrochemical reactions and the performance of the cell. Accordingly, the transport processes in these cells have been investigated thoroughly in previous studies that also carried out functional modeling. Design/methodology/approach A multi-phase model was used to study the limitations of the reactions and their impact on the performance of the cell. The governing equations (conservation of mass, momentum and particle transport) were solved by computational fluid dynamics (CFD) (ANSYS fluent) using appropriate source terms. The two-phase flow in the fuel cell was simulated three-dimensionally under steady-state conditions. The flow of water inside the cell was also simulated at high-current density. Findings The simulation results suggested that the porosity of the gas diffusion layer (GDL) is one of the most important design parameters with a significant impact on the current density limitation and, consequently, on the cell performance. Originality/value This study was mainly focused on the two-phase analysis of the steady flow in the fuel cell and on investigating the impacts of a two-phase flow on the performance of the cell and also on the flow in the GDL, the membrane and the catalyst layer using the CFD.

Effects of Microhydrophobic Porous Layer on Water Distribution in Polymer Electrolyte Membrane Fuel Cells

2013 ◽  
Vol 11 (1) ◽  
Author(s):  
Farzad Ahmadi ◽  
Ramin Roshandel
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Gas Diffusion ◽  
Cell Performance ◽  
Cathode Side ◽  
Two Phase ◽  
Fuel Cell Performance ◽  
Electrolyte Membrane

Performance of polymer electrolyte membrane fuel cells (PEMFC) at high current densities is limited to transport reactants and products. Furthermore, large amounts of water are generated and may be condensed due to the low temperature of the PEMFC. Development of a two-phase flow model is necessary in order to predict water flooding and its effects on the PEMFC performance. In this paper, a multiphase mixture model (M2) is used, accurately, to model two-phase transport in porous media of a PEMFC. The cathode side, which includes channel, gas diffusion layer (GDL), microporous layer (MPL), and catalyst layer (CL), is considered as the computational domain. A multidomain approach has been used and transport equations are solved in each domain independently with appropriate boundary conditions between GDL and MPL. Distributions of species concentration, temperature, and velocity field are obtained, and the effects of MPL on species distribution and fuel cell performance are investigated. MPL causes a saturation jump and a discontinuity in oxygen concentration at the GDL/MPL interface. The effect of MPL thickness on fuel cell performance is also studied. The results revealed that the MPL can highly increase the maximum power of a PEMFC.

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