Numerical Simulation of the Cold-Start Process of Polymer Electrolyte Fuel Cell

In this study, the cold-start process of a polymer electrolyte fuel cell has been numerically investigated under various ambient temperatures and operating currents, ranging from subzero to 283 K. The water desorbed from the electrolyte, when the cell temperature is below the freezing point, is assumed to exist in a state of either supercooled water or ice. The evolution of cell voltage, temperature, membrane water content, and the averaged volume fraction of supercooled water or ice in the catalyst layer and gas diffusion layer are presented. The results indicate that the cold-start process may fail due to ice blocking of the cathode catalyst layer when the desorbed water is in the form of ice and the ambient temperature is sufficiently low. However, when the desorbed water is in a supercooled state, it can diffuse from the cathode catalyst layer to the cathode gas diffusion layer, avoiding water clogging and enabling a successful cold-start process. During the cold-start process, as the ice undergoes a melting process, the membrane water content inside the membrane would increase rapidly, and a larger operation current with anode gas humidification is helpful to the cold-start process.

[1]  S. Feng,et al.  Optimization and cutting‐edge design of fuel‐cell hybrid electric vehicles , 2021, International Journal of Energy Research.

[2]  W. Tao,et al.  Study on the mechanism of destruction triggering of membrane electrode assembly of hydrogen fuel cell , 2020, International Journal of Heat and Mass Transfer.

[3]  Jianbo Zhang,et al.  Analysis of the Failure Modes in the Polymer Electrolyte Fuel Cell Cold-Start Process—Anode Dehydration or Cathode Pore Blockage , 2020, Energies.

[4]  J. W. Park,et al.  On the water transport behavior and phase transition mechanisms in cold start operation of PEM fuel cell , 2019, Applied Energy.

[5]  Xianguo Li,et al.  Humidification strategy for polymer electrolyte membrane fuel cells – A review , 2018, Applied Energy.

[6]  P. Pei,et al.  Approaches to avoid flooding in association with pressure drop in proton exchange membrane fuel cells , 2018, Applied Energy.

[7]  Jianbo Zhang,et al.  Numerical investigation of cold-start behavior of polymer electrolyte fuel cells in the presence of super-cooled water , 2018, International Journal of Hydrogen Energy.

[8]  K. Friedrich,et al.  An Investigation of PEFC Sub‐Zero Startup: Influence of Initial Conditions and Residual Water , 2017 .

[9]  K. Jiao,et al.  Effect of membrane electrode assembly design on the cold start process of proton exchange membrane fuel cells , 2017 .

[10]  F. Marone,et al.  Fast X-ray Tomographic Microscopy: Investigating Mechanisms of Performance Drop during Freeze Starts of Polymer Electrolyte Fuel Cells , 2015 .

[11]  Geonhui Gwak,et al.  A rapid start-up strategy for polymer electrolyte fuel cells at subzero temperatures based on control of the operating current density , 2015 .

[12]  Geonhui Gwak,et al.  Numerical investigation of cold-start behavior of polymer-electrolyte fuel-cells from subzero to normal operating temperatures – Effects of cell boundary and operating conditions , 2014 .

[13]  Hyunchul Ju,et al.  Comparison of numerical simulation results and experimental data during cold-start of polymer electrolyte fuel cells , 2012 .

[14]  T. Fuller,et al.  Electro-osmosis and Water Uptake in Polymer Electrolytes in Equilibrium with Water Vapor at Low Temperatures , 2008, ECS Transactions.

[15]  Hua Meng,et al.  Numerical analyses of non-isothermal self-start behaviors of PEM fuel cells from subfreezing startup temperatures , 2008 .

[16]  Masahiro Shiozawa,et al.  Super-cooled water behavior inside polymer electrolyte fuel cell cross-section below freezing temperature , 2008 .

[17]  Hua Meng,et al.  A PEM fuel cell model for cold-start simulations , 2008 .

[18]  J. Benziger,et al.  Non-Fickian water vapor sorption dynamics by Nafion membranes. , 2008, The journal of physical chemistry. B.

[19]  Chao-Yang Wang,et al.  Non-isothermal cold start of polymer electrolyte fuel cells , 2007 .

[20]  Shanhai Ge,et al.  Characteristics of subzero startup and water/ice formation on the catalyst layer in a polymer electrolyte fuel cell , 2007 .

[21]  Chao-Yang Wang,et al.  A Multiphase Model for Cold Start of Polymer Electrolyte Fuel Cells , 2007 .

[22]  Chao-Yang Wang,et al.  Effects of operating and design parameters on PEFC cold start , 2007 .

[23]  Chao-Yang Wang,et al.  Isothermal Cold Start of Polymer Electrolyte Fuel Cells , 2007 .

[24]  Masahiro Shiozawa,et al.  Behavior of Water below the Freezing Point in PEFCs , 2006, ECS Transactions.

[25]  Thomas Koop,et al.  Review of the vapour pressures of ice and supercooled water for atmospheric applications , 2005 .

[26]  Chao-Yang Wang,et al.  Fundamental models for fuel cell engineering. , 2004, Chemical reviews.

[27]  In-Hwan Oh,et al.  Characteristics of the PEMFC Repetitively Brought to Temperatures below 0°C , 2003 .

[28]  T. Springer,et al.  Polymer Electrolyte Fuel Cell Model , 1991 .

[29]  P. Boillat,et al.  Statistical analysis of isothermal cold starts of PEFCs: impact of gas diffusion layer properties , 2016 .

[30]  K. Friedrich,et al.  An Investigation of PEFC Sub-Zero Startup: Evidence of Local Freezing Effects , 2016 .

[31]  A. Wokaun,et al.  Cold-Start of a PEFC Visualized with High Resolution Dynamic In-Plane Neutron Imaging , 2011 .