Electrolyte Pumping Optimization in Already Manufactured Vanadium Redox Battery Based on Experimentally Determined Electrical and Hydrodynamic Losses
AbstractHerein is presented an optimization of electrolyte pumping systems in industrial vanadium redox flow batteries (VRBs). The main advantages of the VRB relate to its prolonged service life, outstanding dynamic response, and flexible controllability during charge/discharge processes. In spite of their exceptional electrical parameters, VRBs suffer from significant energy requirements in the hydraulic pumping system needed for circulation of electrolyte from external tanks to battery cells. The industrial VRB equipped for this purpose with centrifugal driven by controllable electric motors hydraulic pumps were made from plastic components and able to work in the aggressive acid electrolyte. Electrolyte flow is carried out through the entire hydraulic system and battery cells containing carbon electrodes and providing electrochemical reduction-oxidation reactions of vanadium ions. Currently, electrodes in the VRB are made from carbon felt material because its porous structure possesses high specific su...