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Vanadium Redox Flow Battery

Vanadium Redox Flow Battery
An Historical Overview of the Vanadium Redox Flow Battery Development at the University of New South Wales, Australia


Maria Skyllas-Kazacos
 School of Chemical Engineering & Industrial Chemistry,

University of New South Wales, Sydney, NSW, AUSTRALIA 2052

The Redox Flow Cell is an electrochemical system which allows energy to be stored in two solutions containing different redox couples with electrochemical potentials sufficiently separated from each other to provide an electromotive force to drive the oxidation-reduction reactions needed to charge and discharge the cell. Unlike conventional batteries, the redox flow cell stores energy in the solutions, so that the capacity of the system is determined by the size of the electrolyte tanks, while the system power is determined by the size of the cell stacks. The redox flow cell is therefore more like a rechargeable fuel cell than a battery.


Batteries for Load leveling and distributed power systems.


2 VRB  load-levelling installations in Japan:
• 200 kW/800 kWh VRB at Kashima-Kita  Power Station

• 500  kW/1 MW VRB at Kansai Power Station  (built by SEI)

• Energy  Efficiency of 80%


Tasmania commissions storage system

Pinnacle VRB, a VRB Power Systems subsidiary, announced that it has commissioned the King Island Vanadium Redox Battery Energy Storage System (VRB/EES) at a Hydro Tasmania site in Australia.

The VRB/EES will smooth the short term output variations in wind generators and customer loads while providing frequency and voltage control. It will also implement a system of load shifting for a diesel-wind hybrid generation system.

King Island, a remote Island off the south coast of Australia operates five wind turbines ranging from 250 to 850 kW along with four 1.5 MW diesel generators. These units supply power to local residents and form part of Hydro Tasmania's Renewable Energy Expansion Project.


 To date, flow batteries have mainly been used to assist with load levelling for substations and in buildings or in small isolated storage systems. Using them as part of King Island's overall power grid will be the first use of the technology in large-scale remote power supply systems and an excellent opportunity to showcase Australian innovative research and development.

 The project also incorporates the investigation of demand side management to optimise energy efficiency and reduce system peaks.

 The projected savings from the batteries and overall control system amount to 2800MWh per annum. Hydro Tasmania anticipates that, in addition to substantially reducing the island's dependence on diesel, the project will cut greenhouse emissions by a total of 2000 tonnes of CO2 per annum when fully operational.

Premier Morris Iemma, Minister Frank Sartor, Senator Ian Campbell.
The commitment to time and expenditure burdens the availability of sustainability.

Sydney Water Desalination Kurnell
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