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Topic: Energy storage

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	Energy Storage Council :: About Energy Storage
		Energy storage is one of the most critical components of the "new" electricity value chain.
		Bulk energy storage is truly one of the most promising new areas of the electricity industry.
		The Energy Storage Council believes that bulk energy storage will become the "sixth dimension" of the electricity value chain following fuels/energy sources, generation, transmission, delivery, and customer energy services.
	www.energystoragecouncil.org /aboutenergystorage.htm (198 words)

	energy storage
		Energy storage can improve the efficiency and reliability of the electric utility system by reducing the requirements for spinning reserves to meet peak power demands, making better use of efficient baseload generation, and allowing greater use of intermittent renewable energy technologies.
		Energy storage technologies include utility battery storage, flywheel storage, superconducting magnetic energy storage, compressed air energy storage, pumped hydropower, and supercapacitors.
		A flywheel spinning at very high speeds can be used to store energy by combining it with a device that operates either as an electric motor that accelerates the flywheel to store energy or as a generator that produces electricity from the energy stored in the flywheel.
	www.daviddarling.info /encyclopedia/E/AE_energy_storage.html (421 words)

	PowerPedia:Energy storage - PESWiki
		Energy storage (or power storage) is the storing of some form of energy that can be drawn upon at a later time to perform some useful operation.
		Energy storage as a natural process is billions of years old - the energy produced in the initial creation of the Universe has been stored in stars such as our Sun, and is now being used by humans directly (e.g.
		Another grid energy storage method is to use off-peak electricity to compress air in compressed air energy storage, which is usually stored in an old mine or some other kind of geological feature.
	peswiki.com /index.php/PowerPedia:Energy_storage (2654 words)

	Energy Storage
		Energy storage systems are enabling technologies; their goal is to enhance and extend the operating capabilities of other assets on the grid.
		Energy storage facilities can interact in the electric value chain within three 'business models' which correspond to the market areas where they will interact: wholesale, retail and renewable.
		Two issues make or break most projects: first, 'properly sizing and dispatching the energy storage to achieve an economically optimal system (lowest lifecycle cost of energy)'; and secondly, 'designing the power converter interface between the AC power bus and the energy storage to be efficient, reliable and robust'.
	www.3nw.com /energy/resources/estorage.htm (2899 words)

	Energy Storage
		In applications where on-site water storage is needed for fire protection, it may be feasible to incorporate thermal storage into a common storage tank.
		The oldest form of energy storage involves harvesting ice from lakes and rivers, which was stored in well insulated warehouses and sold or used throughout the year for almost everything we use mechanical refrigeration for today, including preserving food, cooling drinks, and air conditioning.
		Other forms of energy storage were used to power street cars in the 1890s, including compressed air and high temperature hot water that was flashed into steam to run a steam engine.
	www.energy.rochester.edu /storage (929 words)

	FAQ: Kinetic Energy Storage
		The energy density of a flywheel is probably the first criteria for the selection of a material.
		Imagine a rotating thin ring the maximal energy density is only dependent from the specific strength of the material, not from the mass anymore.
		But calling for a quotation of a kinetic energy unit right now is like going to your next car dealer asking the price for A CAR neglecting that there are quite some differences between a Rolls Royce and a Pick-up truck.
	www.aspes.ch /faq.html (1385 words)

	Research - Energy - - Introduction to energy storage
		Energy storage is needed to store electricity, heat and cold, which is produced at times of low demand and low generation cost and from intermittent energy sources such as wind and solar power.
		Energy storage therefore has a pivotal role to play in the effort to combine a future, sustainable energy supply with the standard of technical services and products that we are accustomed to and need.
		The fuel cells' energy capacity is determined by the size of the storage tanks for the active materials, and the power by the area of the electrodes and design of the reactor.
	ec.europa.eu /research/energy/nn/nn_rt/nn_rt_st/article_1154_en.htm (1160 words)

	Low-temperature fabrication of thin-film energy-storage devices - Patent 6962613
		Other energy storage devices, such as supercapacitors, and energy conversion devices, such as photovoltaics and fuel cells, are alternatives to batteries for use as power supplies in portable electronics and non-portable electrical applications.
		Photons of light having energy equal to or greater than the band gap of the first semiconductor film are strongly absorbed, but photons of light of energy less than the band gap of the first semiconductor pass through the first semiconductor and enter the second semiconductor film.
		The thin films of the energy conversion devices are improved in a similar manner as described herein for the thin films of energy storage devices.
	www.freepatentsonline.com /6962613.html (17868 words)

	Chemical heat pump and chemical energy storage system - Patent 4532778
		The heat supplied to the heat exchanger 18 comes from a primary energy source, such as a solar collector, that gathers solar energy during periods of sunlight and converts the solar energy to heat, which in turn is used to heat a heat transfer medium to temperatures on the order of 80.degree.
		The energy storage density of the sulfuric acid/water system is a function of the maximum acid concentration during charging and the minimum acid concentration upon discharging.
		To reiterate, the main advantages of the heat pump and storage system are a high energy storage density, the ability of the system to function as a heat pump at temperatures that are usable for building heating and cooling loads or industrial processes, and the utilization of readily available chemicals, water and sulfuric acid.
	www.freepatentsonline.com /4532778.html (8038 words)

	PCM Energy Storage
		A scale model of the heat storage unit was fabricated to investigate the heat transfer characteristics of this eutectic encapsulated in HDPE balls.
		It is desirable to use the renewable energy for the greenhouse heating in winter season, it makes it possible not only to save fossil fuel and conserve green farm environment but also to promote the quality of agricultural products and reduce the agricultural production cost.
		An experimental study was performed to investigate the possible use of a compound that undergoes solid-solid phase transformation for energy storage in a fluidised bed configuration, and to determine the heat transfer characteristics of this system.
	freespace.virgin.net /m.eckert/pcm_solar_energy_storage.htm (2065 words)

	Why Energy Storage
		Without storage, the industry must operate within a "justin-time" framework that is dependent not only on variable end-use demands, but is also completely at the mercy of one of the most uncontrollable variables known: weather.
		With storage, the owners only must build out what is necessary to carry a heavy, but normal load—resulting in a much higher utilization of the existing equipment, and hence a higher return on their investments (ROI).
		By utilizing energy storage technologies, each of these challenges facing the industry can be greatly diminished thereby leading to a more efficient market that costs less to operate, that is more responsive to market changes, and that is more reliable in the event of a disruption.
	www.americanenergyindependence.com /energystorage.html (1397 words)

	Wind Blog » Blog Archive » Energy Storage
		Energy storage seems to have captured the imagination of the public.
		Renewable energy of all types has variable output, depending on the wind, sun, rain, waves, or tides, and so some storage is required to be to 100% renewable.
		Battery storage is in widespread use in off grid applications, but is seen as too costly to provide backup for the main electricity grid.
	www.biofuels.coop /windblog/?p=120 (1224 words)

	IEA Technology
		Energy storage technologies are a strategic and necessary component for the efficient utilization of renewable energy sources and energy conservation.
		Thermal energy storage can also be used for cooling to reduce or eliminate the demand for electricity, including the most expensive electrical energy that is generated during periods of peak power demand.
		The overall objective of the Implementing Agreement on Energy Conservation through Energy Storage is to develop and demonstrate various advanced energy storage technologies for application within a variety of energy systems, and to and encourage their use as standard engineering design options.
	www.iea.org /dbtw-wpd/textbase/techno/iaresults.asp?id_ia=13 (341 words)

	Distributed Energy Resources Guide: equipment- Energy Storage / UPS Systems
		The kinetic energy stored in the rotor is transformed to DC electric energy by the generator, and the energy is delivered at a constant frequency and voltage through an inverter and a control system.
		High temperature SMES cooled by liquid nitrogen is still in the development stage and may become a viable commercial energy storage source in the future.
		An electric motor-driven compressor is used to pressurize the storage reservoir using off-peak energy and air is released from the reservoir through a turbine during on-peak hours to produce energy.
	www.energy.ca.gov /distgen/equipment/energy_storage/energy_storage.html (862 words)

	Compressed air wind energy storage \| EnergyBulletin.net \| Peak Oil News Clearinghouse
		In a 2003 paper entitled “Large Scale Energy Storage Systems”, six students of engineering at Imperial College London noted that compressed air energy storage (CAES) systems typically relied on plants burning fossil fuels to compress the air stored in large underground caverns, which then used this air to produce energy at peak hours.
		Hunter agrees that compressed air storage for use in making energy has been around for a long time, but the idea of using it in conjunction with wind energy is fairly new and doubly intriguing, because the wind energy is “free” and has lower environmental costs than buying and burning fossil fuels.
		Although the first working wind energy storage installation at a wind farm might still be long off, these development efforts seem to be coming at the right time.
	www.energybulletin.net /11252.html (1407 words)

	EPRI Portfolio 2007 - 94.002 Energy Storage Business Tools and Utility Business Models (Site not responding. Last check: )
		Energy storage has been both studied and demonstrated at every point along the energy delivery chain, from large, central station-like installations, to transmission and distribution level systems, to distributed energy systems, and finally to small, customer-side-of-the meter devices.
		Strategic storage benefits flow from deferring capital investment, accommodating risk adversity, achieving environmental advantage, reducing uncertainty in load growth, and deploying a technological advantage to respond quickly to changing loads and regulatory rules.
		The multi-year, phased study of locational benefits of storage would continue with final release of the cost-benefit spreadsheet tool begun in 2007, followed by use of the tool to determine cost-benefits as a function of location of storage along the energy supply chain.
	www.epri.com /portfolio/product.aspx?id=1876 (1451 words)

	Energy Storage - GuildWiki
		Energy Storage is the Elementalist primary attribute, meaning that only a character with Elementalist as their primary profession can put points into this attribute.
		This energy regenerates at the same rate as a Monk's, Necromancer's, Mesmer's, Assassin's, Ritualist's, or Dervish's, which tends to lead to long recharging breaks.
		Note that, unlike most other energy bonuses, extra energy from Energy Storage is calculated before the effects of Morale Boost and death penalty.
	gw.gamewikis.org /wiki/Energy_Storage (305 words)

	NREL: Energy Storage - Ultracapacitors
		The amount of energy stored is very large compared to a standard capacitor because of the enormous surface area created by the porous carbon electrodes and the small charge separation (10 angstroms) created by the dielectric separator.
		Ultracapacitors can be primary energy devices for power assist during acceleration and hill climbing, as well as for recovery of braking energy.
		Learn about the energy storage research and development that's being performed at NREL to improve batteries and ultracapacitors for advanced vehicles.
	www.nrel.gov /vehiclesandfuels/energystorage/ultracapacitors.html (483 words)

	Superconducting Magnetic Energy Storage (Site not responding. Last check: )
		If the coil were wound using a conventional wire such as copper, the magnetic energy would be dissipated as heat due to the wire's resistance to the flow of current.
		It is able to store energy with a loss of only 0.1% per hour (this is required for the cooling system), compared to a loss of about 1% per hour loss for flywheels.
		In a SMES system, energy is stored within a magnet that is capable of releasing megawatts of power within a fraction of cycle to replace a sudden lose in line power.
	www.doc.ic.ac.uk /~matti/ise2grp/energystorage_report/node8.html (1352 words)

	Department of Energy - Energy Storage
		The major storage system components (storage device, power electronics, control system, AC connection) are designed as interfacing modules so that integration can occur either at the factory or seamlessly at the customer site.
		Storage system projects in response to reliability needs of the digital economy will be initiated.
		Development of advanced storage devices (flywheels, high energy density capacitors, advanced batteries), associated power electronics, intelligent control systems and component testing provide a base for future energy storage systems.
	www.oe.energy.gov /randd/energy_storage.htm (296 words)

	Alternative Energy Storage Methods including supercapacitors, flywheel batteries, compressed air storage, springs, ...
		Several non chemical energy storage techniques have been developed over the years, mostly for very high power applications and while all of them have been used in practical systems, apart from capacitors, there has been slow take up of the ideas up to now.
		Energy storage in a flywheel is as old as the potters wheel.
		An electric motor-driven compressor is used to pressurize the storage reservoir using off-peak energy and air is released from the reservoir through a turbine during on-peak hours to produce electrical energy.
	www.mpoweruk.com /alternatives.htm (2032 words)

	Energy Storage
		Flywheels are good because they store energy very efficiently but their specific energy is very low at this point in their development compared to other available products making them an inappropriate choice for energy storage in our HEV.
		Specific energy is important because it affects the number of batteries, and hence the mass of batteries, that a vehicle needs to carry on-board to attain a certain electric-only range.
		The optimization section for the vehicle energy storage is difficult in a sense because we have no way of changing a manufactured battery.
	www.engineering.sdsu.edu /~hev/energy.html (3903 words)

	Energy Storage - A Stealth Technology? Bulk Electrical Energy Storage Can Be a Valuable Asset in the Future Utility Grid
		Energy storage could be considered as either a competitive or a complementary technology to distributed generation.
		It is competitive in that both distributed generation and energy storage perform many of the same functions and have similar value propositions.
		This report looks at the value of larger, utility-scale energy storage, ascertains the most likely markets and applications, and examines the next generation of electrical storage devices as compared to more conventional storage options that exist today.
	www.marketresearch.com /product/display.asp?productid=1334248&partnerid=811788012 (266 words)

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