Journal
JOURNAL OF POWER SOURCES
Volume 294, Issue -, Pages 305-311Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2015.06.020
Keywords
Vanadium flow battery; Electrolyte flow rate; Pulsating; System efficiency; Pump
Funding
- National Research Foundation, Singapore [NRF-CRP8-2011-04]
- Temasek Polytechnic
- National University of Singapore
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Proper management of electrolyte flow in a vanadium redox battery (VRB) is crucial to achieve high overall system efficiency. On one hand, constant flow reduces concentration polarization and by extension, energy efficiency; on the other hand, it results in higher auxiliary pumping costs, which can consume around 10% of the discharge power. This work seeks to reduce the pumping cost by adopting a novel pulsing electrolyte flow strategy while retaining high energy efficiency. The results indicate that adopting a short flow period, followed by a long flow termination period, results in high energy efficiencies of 80.5% with a pumping cost reduction of over 50%. (C) 2015 Elsevier B.V. All rights reserved,
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