Thermal hydraulic behavior and efficiency analysis of an all-vanadium redox flow battery

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Binyu Xiong
  • K. J. Tseng
  • Maria Skyllas-Kazacos
  • Tuti Mariana Lim
  • Yu Zhang

Detail(s)

Original languageEnglish
Pages (from-to)314-324
Journal / PublicationJournal of Power Sources
Volume242
Publication statusPublished - 2013
Externally publishedYes

Abstract

Vanadium redox flow batteries (VRBs) are very competitive for large-capacity energy storage in power grids and in smart buildings due to low maintenance costs, high design flexibility, and long cycle life. Thermal hydraulic modeling of VRB energy storage systems is an important issue and temperature has remarkable impacts on the battery efficiency, the lifetime of material and the stability of the electrolytes. In this paper, a lumped model including auxiliary pump effect is developed to investigate the VRB temperature responses under different operating and surrounding environmental conditions. The impact of electrolyte flow rate and temperature on the battery electrical characteristics and efficiencies are also investigated. A one kilowatt VRB system is selected to conduct numerical simulations. The thermal hydraulic model is benchmarked with experimental data and good agreement is found. Simulation results show that pump power is sensitive to hydraulic design and flow rates. The temperature in the stack and tanks rises up about 10 C under normal operating conditions for the stack design and electrolyte volume selected. An optimal flow rate of around 90 cm3 s-1 is obtained for the proposed battery configuration to maximize battery efficiency. The models developed in this paper can also be used for the development of a battery control strategy to achieve satisfactory thermal hydraulic performance and maximize energy efficiency. © 2013 Elsevier B.V. All rights reserved.

Research Area(s)

  • Battery efficiency, Optimal flow rate, Pump power losses, Thermal hydraulic modeling, Vanadium redox flow battery

Citation Format(s)

Thermal hydraulic behavior and efficiency analysis of an all-vanadium redox flow battery. / Xiong, Binyu; Zhao, Jiyun; Tseng, K. J.; Skyllas-Kazacos, Maria; Lim, Tuti Mariana; Zhang, Yu.

In: Journal of Power Sources, Vol. 242, 2013, p. 314-324.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review