23-03-2012, 03:39 PM
G1 and G2 Vanadium Redox Batteries for Renewable Energy Storage
vrb.pdf (Size: 1.28 MB / Downloads: 135)
Why Electrochemical Energy Storage?
Involve direct conversion of chemical
energy into electrical energy
Eliminate mechanical and thermal steps
associated with other methods of
generation and storage
Allow high conversion efficiencies - over
80% possible.
VRB Technical Benefits
.Cross-mixing of electrolytes across membrane
does not lead to contamination of electrolytes.
• Solutions have indefinite life so replacement costs
are low (only battery stacks need replacement at
end of life).
•Indefinite life of solution means they can be
continuously recycled so no waste disposal
problems.
•Vanadium readily available and relatively low cost,
so that manufacturing or capital costs are low.
ENERGY STORED IN TANKS, SEPARATE FROM CELL STACK.
Capacity increased simply by adding more solution.
•Land space can be saved by building underground
electrolyte storage tanks.
•Instant recharge possible by exchanging solutions
•Cost per kWh decreases as storage capacity
increases.