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VRB
Vanadium Redox Flow
Battery
An Historical Overview of the
Vanadium Redox Flow Battery Development at the University of New South
Wales, Australia
by
Maria Skyllas-Kazacos
School of Chemical Engineering & Industrial Chemistry,
University of New South Wales, Sydney, NSW, AUSTRALIA 2052
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FLOW CELLS
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.
http://www.ceic.unsw.edu.au/centers/vrb/
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2003
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.
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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.
http://www.greenhouse.gov.au/renewable/recp/enabling/three.html
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