Optimization of the Operating Point of a Vanadium Redox Flow Battery

Modeling a vanadium redox flow battery (VRB) is intrinsically a multiphysics task based on electrochemistry and fluid mechanics. The electrochemical model predicts the stack voltage and determines the internal losses and the vanadium concentrations within the battery whereas the mechanical model determines the power required to flow the electrolyte: this power represents also a system loss. This paper propose a new control strategy that enhance the overall performance of the battery by taking advantage of the knowledge of the VRB operating principles provided by the multiphysics model. The battery is either controlled by a reference current or a reference power; both cases are examined in detail and a method to determine the optimal operating point is proposed. The optimal control strategies are then compared to other strategies through a series of charge and discharge cycles. The energy efficiency is increased by 10%.


Published in:
2009 Ieee Energy Conversion Congress And Exposition, Vols 1-6, 2600-2605
Presented at:
IEEE Energy Conversion Congress and Exposition, San Jose, CA, 20-24 September 2009
Year:
2009
Publisher:
Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa
ISBN:
978-1-4244-2893-9
978-1-4244-2892-2
Keywords:
Laboratories:


Note: The status of this file is: EPFL only


 Record created 2012-01-12, last modified 2018-03-17

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