2 weeks Ago By itaizul0011
Investigating heat transfer for PEM fuel cell cooling channels A research group at the Department of Energy Engineering of the University of Seville and collaborators at AICIA and Harbin Institute of Technology in China have achieved a better understanding of the cooling of polymer electrolyte membrane (PEM) fuel cell stacks and the relationship with the temperature gradients in the membrane. The investigation was based on the numerical analysis of the heat transfer for serpentine-type channels in a PEM fuel cell, assessing the influence of the operating conditions to establish a novel correlation for the heat transfer performance, i.e.
, the Nusselt number. Results determined that the coolant mass flow and the bipolar plate presented a higher effect on the refrigeration capability of a PEMFC stack. The findings are in the journal .
Refrigeration of the stacks plays an important role in the of PEMFC stacks because proper cooling helps to mitigate the risks caused by excessive temperature gradients that lead to degradation and detrimental effects on the integrity of the membrane. Consequently, refrigeration of the stacks plays a key role in the efficiency and durability of a PEM stack. The refrigeration capability of the PEM stack was studied through (CFD) simulations in a 100 cm active area cell with serpentine type cooling channels, varying the coolant type, the mass flow rate, the thermal contact resistance, the bipolar plate material and the design of the cooling channels.
A novel heat transfer correlation was proposed with validity for a comprehensive range of operating conditions. The main result of this research—a novel correlation for the Nusselt number for PEM that can be used for a wide range of operating conditions—will facilitate the cooling system design in a PEM stack, allowing researchers to foresee whether designs would eventually lead to degradation, thus contributing to the design of stacks with longer durability and performance. Investigating heat transfer for PEM fuel cell cooling channels, Nuvera Fuel Cells Delivers First Hydrogen-Powered Mobile Generator for Customer Site Demonstration BILLERICA, MA / ACCESSWIRE / September 19, 2024 / Nuvera Fuel Cells, LLC, an established leader in the development of.
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