Showing papers by "Sreenivas Jayanti published in 2020"
TL;DR: In this paper, the authors report on a comprehensive characterization of the performance of cells using interdigitated flow fields for vanadium redox flow batteries and show that the best inter-digitated configuration among those studied has the best discharge capacity at high flow rates; however, the serpentine is superior, in terms of both discharge capacity and pressure drop, at its best operating condition, which occurs at lower flow rates.
29 citations
TL;DR: In this paper, the optimal performance condition for vanadium redox flow battery cells was derived for the case where the local convective velocity in the electrode is the same and is of the order of Reynolds number 2, and a model was developed to determine the optimal electrolyte circulation rate for a given cell size and operating current density.
Abstract: Sufficient convective velocity in the electrode is essential for the good performance of a flow battery. The present study is concerned with identifying how this condition is attainable for a given size of a vanadium redox flow battery cell. To this end, detailed experimental investigations of fluid dynamic and electrochemical characteristics with serpentine flow fields have been done in cells with active area of 416, 918 and 1495 cm2, and optimal operating conditions of reasonably high efficiency, discharge capacity and energy density have been identified for each size. Investigations using calibrated computational fluid dynamics simulations show that optimal performance condition for each cell size corresponds to the case where the local convective velocity in the electrode is the same and is of the order of Reynolds number ~2. Based on this condition, a model has been developed to determine the optimal electrolyte circulation rate for a given cell size and operating current density.
22 citations
TL;DR: This study considers the optimal sizing of a three-way hybrid powertrain consisting of a compact reformer, a compact battery and a low temperature PEM fuel cell stack serving as the main power unit and shows that for performance characteristics of Toyota Mirai, a smaller NiMH battery size would be optimal.
8 citations