Akademik Veri Yönetim Sistemi
5th International Hydrogen Technologies Congress - Online, Niğde, Türkiye, 26 - 28 Mayıs 2021, ss.55-57
Abstract
Bipolar plates, which cover a large part of fuel cells in terms of weight and cost, are an important system element for fuel cells. The selection and optimization of flow field geometries of bipolar plates directly affects fuel cell performance. The pressure drops behavior that occurs in the flow channels has significant effects on fuel cell performance. Within the scope of this study, flow channels of different geometries were created to be used directly in the borohydride fuel cell and pressure drop behavior was investigated by performing experiments at certain flow rates to each flow channel. For this reason, 3 pin type flow channel geometries were created in SOLIDWORKS software, and the CAD data created was processed on a 10cmx10cm polycarbonate plate on a CNC machine. Each of the flow channels processed was tested with certain flow rates (3ml / min, 6ml / min, 9ml / min, 12ml / min and 15ml / min) in the experimental setup created for pressure drop measurement. From the results of the experiment, it has been determined that the pressure drop increases with the increasing flow rate for all 3 types of flow channels. The obtained data were compared with Comsol Multiphysics software and the best flow channel was determined accordingly. However, it was observed that the pressure drop increased with increasing distance between the channels in the pin flow channel.
Keywords: Flow channel, pressure drop, direct borohydride fuel cell, fuel cel