Non-isothermal modelling of the all-vanadium redox flow battery
Non-isothermal modelling of the all-vanadium redox flow battery
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DOI：
10.1016/j.electacta.2009.08.009
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发表时间：
2009-12-15
影响因子：
6.6
通讯作者：
Walsh, F. C.
中科院分区：
文献类型：
--
作者：
Al-Fetlawi, H.;Shah, A. A.;Walsh, F. C.
建立了全钒液流电池的非等温模型。二维模型基于对质量的全面描述。电荷，能量和动量的传输和守恒，并结合了涉及钒物种的反应的全球动力学模型。由于活化损失、电化学反应和欧姆电阻而产生热量。数值模拟证明了工作温度的变化对性能的影响。结果表明，在电解液的流量和施加的电流的大小的变化基本上改变的充电/放电特性，温升和温度的分布。研究了热损失对充放电行为和温度分布的影响。局部加热和膜降解的条件进行了讨论。(C)2009爱思唯尔有限公司版权所有。
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. (C) 2009 Elsevier Ltd. All rights reserved.