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http://dx.doi.org/10.3795/KSME-B.2016.40.12.769

Numerical Investigation of the Discharge Efficiency of a Vanadium Redox Flow Battery with Varying Temperature and Ion Concentration  

Lee, Jonghyeon (Graduate school of Mechanical Engineering, Changwon Nat'l Univ.)
Park, Heesung (Graduate school of Mechanical Engineering, Changwon Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.40, no.12, 2016 , pp. 769-776 More about this Journal
Abstract
In this study, a numerical simulation of a vanadium redox flow battery was investigated for reactions involving an electrochemical species using comprehensive conservation laws and a kinetic model. For a 3-D geometry of the cell, the distributions of electric potential, vanadium concentration, overpotential, and ohmic loss were calculated. The cell temperature and initial vanadium ion concentration were set as variables. The voltage and electrochemical loss were calculated for each variable. The effects of each variable's impact on the electrochemical performance of a vanadium redox flow battery was numerically analyzed using the calculated overpotential in the electrode and the ohmic loss in the electrolyte phase. The cell temperature increased from $20^{\circ}C$ to $80^{\circ}C$ when the voltage efficiency decreased from 89.34% to 87.29%. The voltage efficiency increased from 88.65% to 89.25% when the vanadium concentration was changed from $1500mol/m^3$ to $3000mol/m^3$.
Keywords
Vanadium Redox Flow Battery; Numerical Simulation; Temperature; Ion Concentration; Electrochemical Efficiency;
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Times Cited By KSCI : 4  (Citation Analysis)
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