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题名: A three-dimensional model for thermal analysis in a vanadium flow battery
作者: Zheng, Qiong1, 2, 3;  Zhang, Huamin1;  Xing, Feng1;  Ma, Xiangkun4;  Li, Xianfeng1;  Ning, Guiling2
关键词: Three-dimensional model ;  Thermal analysis ;  Vanadium flow battery (VFB) ;  Heat generation ;  Temperature distribution
刊名: APPLIED ENERGY
发表日期: 2014
DOI: 10.1016/j.apenergy.2013.09.021
卷: 113, 页:1675-1685
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Energy & Fuels ;  Engineering, Chemical
研究领域[WOS]: Energy & Fuels ;  Engineering
英文摘要: A three-dimensional model for thermal analysis has been developed to gain a better understanding of thermal behavior in a vanadium flow battery (VFB). The model is based on a comprehensive description of mass, momentum, charge and energy transport and conservation, combining with a global kinetic model for reactions involving all vanadium species. The emphasis in this paper is placed on the heat losses inside a cell. A quasi-static behavior of temperature and the temperature spatial distribution were characterized via the thermal model. The simulations also indicate that the heat generation exhibits a strong dependence on the applied current density. The reaction rate and the over potential rise with an increased applied current density, resulting in the electrochemical reaction heat rises proportionally and the activation heat rises at a parabolic rate. Based on the Ohm's law, the ohmic heat rises at a parabolic rate when the applied current density increases. As a result, the determining heat source varies when the applied current density changes. While the relative contribution of the three types of heat is dependent on the cell materials and cell geometry, the regularities of heat losses can also be attained via the model. In addition, the electrochemical reaction heat and activation heat have a lack of sensitivity to the porosity and flow rate, whereas an obvious increase of ohmic heat has been observed with the rise of the porosity. A lower porosity or a faster flow shows a better uniformity of temperature distribution in a VFB. Thus, the model proposed in this paper shows good prospect in heat and temperature management for a VFB aiming at eliminating any crisis of internal heat accumulation. (C) 2013 Elsevier Ltd. All rights reserved.
关键词[WOS]: MATHEMATICAL-MODEL ;  ION BATTERIES ;  FUEL-CELLS ;  HALF-CELL ;  ELECTRODES ;  SIMULATION ;  TRANSPORT ;  MEMBRANES ;  CROSSOVER
语种: 英语
WOS记录号: WOS:000329952500157
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145864
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Div Energy Storage, Dalian 116023, Peoples R China
2.Dalian Univ Technol, Sch Chem Engn, Dalian 116023, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
4.Dalian RONGKEPOWER Co Ltd, Dalian 116025, Peoples R China

Recommended Citation:
Zheng, Qiong,Zhang, Huamin,Xing, Feng,et al. A three-dimensional model for thermal analysis in a vanadium flow battery[J]. APPLIED ENERGY,2014,113:1675-1685.
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