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Wind Energy Storage Options GREG BELL WARRINGTON EGGLESTON SARAH HARDING.
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Transcript of Wind Energy Storage Options GREG BELL WARRINGTON EGGLESTON SARAH HARDING.
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Wind Energy Storage OptionsGREG BELL
WARRINGTON EGGLESTON
SARAH HARDING
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Background Information
Unlike coal or other energy sources, the amount of energy produced by wind cannot be controlled.
A large wind farm’s generating capacity can drop from gigawatts to zero watts in just seconds.
Electrical energy cannot be stored directly, so supply must meet demand and this balance has cost implications.
If a turbine’s energy is moved directly to the grid, energy in excess of the grid’s demand must be dumped.
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Storage Options
Pumped Hydroelectric Storage (PHS) [Gravitational Potential Energy]
Battery Storage (Chemical Energy)
Compressed Air Energy Storage (Potential Energy)
Flywheels (Kinetic Energy)
Must be efficient in storage and provide power in a timely manner to meet demand.
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Pumped Hydroelectric Storage Most mature and most used form of
storage (127 GW worldwide storage capacity).
Electricity is used to pump water uphill where it is stored as gravitational potential energy.
Low energy density – large area required.
Constrained by elevation and water availability.
Pumped hydro systems round trip efficiency is between 75 and 78 percent.
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Compressed Air Energy Storage(CAES)
Use electricity to power an air compressor
The energy is converted back to electricity by mixing pressurized air with fuel and using it to power a combustion engine
Efficiency estimates vary significantly depending on the specific CAES technology and geologic features, but is usually between 73 and 89 percent
Risk of explosion
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Flywheel Energy Storage(FES)
Converts electricity to kinetic energy in the form of rotational momentum of a mass
Converted back into electricity by letting the spinning mass power a motor
About an hour of stored energy, but can be released instantaneously
Constrained by rotor material strength, weight, and cost, as well as motor-generator size and technology
Can cause noise pollution
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Electrochemical Batteries
Lead acid Very low cost, low specific energy and power, short life cycle, high
maintenance requirements and toxicity
Nickel cadmium Relative low cost, high energy density, high power delivery
capabilities, hardiness, reliability, high life expectancy and toxicity
Lithium Ion High cost, high energy density, are less mature, low standby losses
and cycling tolerance, low expected lifetime at full discharge, used in consumer electronics
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Comparison of Options
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Comparison of Options
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Comparison of Options
Installed Revenue Opportunity
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Comparison of Options
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Comparison of Options
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Works Cited
http://www.purdue.edu/discoverypark/energy/assets/pdfs/SUFG/publications/SUFG%20Energy%20Storage%20Report.pdf
http://spectrum.ieee.org/energywise/energy/renewables/an-energystoring-wind-turbine-would-provide-power-247
https://upcommons.upc.edu/e-prints/bitstream/2117/11473/1/Mu%C3%B1oz4.pdf
https://www.wind-watch.org/faq-electricity.php
http://www.mpoweruk.com/electricity_demand.htm