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Non-isothermal modelling of the all-vanadium redox flow battery

Non-isothermal modelling of the all-vanadium redox flow battery
Non-isothermal modelling of the all-vanadium redox flow battery
An non-isothermal model for the all-vanadium redox flow battery (RFB) is presented. The two-dimensional model is based on a comprehensive description of mass, charge, energy and momentum transport and conservation, and is combined with a global kinetic model for reactions involving vanadium species. Heat is generated as a result of activation losses, electrochemical reaction and ohmic resistance. Numerical simulations demonstrate the effects of changes in the operating temperature on performance. It is shown that variations in the electrolyte flow rate and the magnitude of the applied current substantially alter the charge/discharge characteristics, the temperature rise and the distribution of temperature. The influence of heat losses on the charge/discharge behaviour and temperature distribution is investigated. Conditions for localised heating and membrane degradation are discussed
redox flow battery, vanadium, modelling and simulation, energy balance, temperature
0013-4686
78-89
Al-Fetlawi, H.
5a212f9a-a32b-4a58-b8d4-09f374403028
Shah, A.A.
5c43ac37-c4a7-4256-88ef-8c427886b924
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2
Al-Fetlawi, H.
5a212f9a-a32b-4a58-b8d4-09f374403028
Shah, A.A.
5c43ac37-c4a7-4256-88ef-8c427886b924
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2

Al-Fetlawi, H., Shah, A.A. and Walsh, F.C. (2009) Non-isothermal modelling of the all-vanadium redox flow battery. Electrochimica Acta, 55 (1), 78-89. (doi:10.1016/j.electacta.2009.08.009).

Record type: Article

Abstract

An non-isothermal model for the all-vanadium redox flow battery (RFB) is presented. The two-dimensional model is based on a comprehensive description of mass, charge, energy and momentum transport and conservation, and is combined with a global kinetic model for reactions involving vanadium species. Heat is generated as a result of activation losses, electrochemical reaction and ohmic resistance. Numerical simulations demonstrate the effects of changes in the operating temperature on performance. It is shown that variations in the electrolyte flow rate and the magnitude of the applied current substantially alter the charge/discharge characteristics, the temperature rise and the distribution of temperature. The influence of heat losses on the charge/discharge behaviour and temperature distribution is investigated. Conditions for localised heating and membrane degradation are discussed

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Published date: 15 December 2009
Keywords: redox flow battery, vanadium, modelling and simulation, energy balance, temperature

Identifiers

Local EPrints ID: 69061
URI: https://eprints.soton.ac.uk/id/eprint/69061
ISSN: 0013-4686
PURE UUID: 560bae70-81a2-496b-9d31-d6720d0dc620

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Date deposited: 21 Oct 2009
Last modified: 11 Nov 2019 21:22

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