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Assessment of Hydrodynamic Performance of Vanadium Redox Flow Batteries at Low Temperatures by Praphulla Rao; Ravendra Gundlapalli; Sreenivas Jayanti is a scholarly article available to read on EtoBox.

What is Assessment of Hydrodynamic Performance of Vanadium Redox Flow Batteries at Low Temperatures about?

Recent literature on the performance of vanadium redox flow batteries at low temperature shows degraded electrochemical performance attributable to increased resistance for the reaction kinetics and species transport. The present paper deals with the influence of low temperature operation on hydrodynamic parameters such as viscosity of electrolyte and permeability of electrode as these can affect the parasitic losses associated with electrolyte circulation. Measurements of these parameters and the associated pressure drop have been made at three temperatures, namely, 25, 10 and −10 °C for a vanadium flow battery cell of area 412 cm2 fabricated with porous electrodes of thickness 6.0 and 4.6 mm with compression ratio in the range 17 to 50 %. Results indicate increase in both viscosity and permeability as the operating temperature decreases. This results in a substantial loss due to parasitic power consumption such that the gains in stack energy efficiency at high flow rates may be nullified by pumping power losses when the stack is operated at very low temperatures. Modelling results show that cell pressure losses far outweigh manifold pressure losses. The study shows that careful b

Author

Praphulla Rao; Ravendra Gundlapalli; Sreenivas Jayanti

Publisher

Elsevier BV

Published

2022

Language

EN