1Department of Mechanical Engineering, Sari Branch, Islamic Azad University, Sari, Iran
2Department of Mechanical Engineering, Joybay Branch, Islamic Azad University, Jouybar, Iran
3Department of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
In this study cross section geometry and material of gasket in proton exchange membrane (PEM) fuel cells have been investigated to achieve optimized fuel cell in terms of energy efficiency. The role of gaskets in fuel cells is sealing of gas flow channels and preventing from combination of them. In a PEM stack, gasket with approved geometry that suffers more stress has better sealing. For this investigation, at first experimental leakage tests have been done and after gaskets manufacturing, stack assembly, putting setup under press and studying leakage values in terms of time and various pressures, results showed that sealing gasket with width of 3mm and thickness of 0.4mm in pressure of 2MPa seals well according to standards, To access to optimal results, width of 3mm and thickness of 0.4mm has been considered for numerical simulation. After leakage test, some materials have been tested and results showed that gasket with hyper elastic properties is the best choice for sealing. After experimental tests 6 shapes of gasket cross section profile in fuel cell stack have been modeled in Abaqus software and with attention to results and analyzing them, the best material and profile shape for gasket in fuel cell has been selected. Results of simulations showed good uniform pressure distribution in stack.
 Siegel Ch. et al., "Approaches for the Modeling of PBI/H3PO4 Based HT-PEM Fuel Cells", High Temperature Polymer Electrolyte Membrane Fuel Cells, Springer International Publishing, 2016, 18: 387.
 Habibnia M. et al., "Investigation and optimization of a PEM fuel cell’s electrical and mechanical behavior", Iranian Journal of Hydrogen & Fuel Cell,2016, 3: 1.
 Habibnia M. et al., "Determination of the effective parameters on the fuel cell efficiency, based on sealing behavior of the system", Int. J. Hydrogen Energy,2016, 41: 18147.
 Hood PD. et al., U.S. Patent 9 266 728, 2016.
 Jinzho T. et al., "Degradation of Silicone rubber under compression in a simulated PEM fuel cell environment", Journal of Power sources, 2007, 172: 782.
 Larry F., "PEMFC stack sealing Using Silicone elastomers", SAE world congress Detroit, Michigan, USA, 2003: 01.
 Kundle I. and Hickmann T., "Bipolar Plates and Gaskets: Different Materials and Processing Methods", High Temperature Polymer Electrolyte Membrane Fuel Cells, Springer International Publishing, 2016, 19: 425.
 Belchuk M. A., U.S. Patent 9 484 581, 2016.
 Asghari S. et al., "Design and construction of 3.5 KW fuel cell gasket", sixteenth annual conference of mechanical engineering, Kerman, Iran, 2008.
 Tan J. et al., "Degradation of silicone rubber under compression in a simulated PEM fuel cell environment", J. Power Sources, 2007, 172: 782.
 Hitendra K. S., "Lifetime Prediction and Durability of Elastomeric Seals for Fuel Cell Applications" Dissertation Submitted to the Faculty of the Virginia Polytechnic Institute and State University in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in Engineering Mechanics, 2009.
 Lai, Xinmin. et al., "A mechanical–electrical finite element method model for predicting contact resistance between bipolar plate and gas diffusion layer in PEM fuel cells", Journal of Power Sources, 2008, 182: 153.