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Colin Bennett

Pentadyne flywheels ready for railroads - 1 views

cleantech.com/...dyne-flywheels-ready-railroads

UPS flywheels

shared by Colin Bennett on 02 Mar 10 - Cached
  • Pentadyne’s flywheel technology is primarily used for uninterruptible power supply (UPS) at places where even momentary power outages can be disastrous, such as hospitals and data centers. As a backup power source, the flywheel can provide about 15 seconds of power, giving enough time for the backup diesel generator to begin running.
Hans De Keulenaer

World's first grid-scale flywheel energy plant to go online soon | Energy - 4 views

www.greenbang.com/t-to-go-online-soon_15001.html

flywheels storage networks

shared by Hans De Keulenaer on 11 Aug 10 - Cached
  • Once construction of its innovative plant in Stephentown, New York, is complete, Beacon Power expects to be able to provide up to 20 megawatts of energy capacity to the region’s electricity grid. The first four megawatts of capacity are set to come online earlier, however — by the end of this year.
Hans De Keulenaer

Railway Gazette: UltraCaps win out in energy storage - 0 views

www.railwaygazette.com/...n_out_in_energy_storage-1.html

public transport supercapacitors

shared by Hans De Keulenaer on 31 Mar 08 - Cached
  • Hans De Keulenaer on 31 Mar 08
     
    REGENERATIVE BRAKING is widely practised, but there have to be other trains around to absorb the surplus power being fed back into the catenary or third rail. Processing the output from trains and pushing it back into the local grid is possible with an AC power supply, but very expensive with DC traction. Too often, power produced by traction motors in braking mode ends up heating resistor banks. The elegant alternative is to store the braking energy on the train. This not only avoids the electrical complications of regenerating through the traction power supply network. It reduces the rated power requirement of that network by lopping demand peaks during acceleration, saves energy by reducing losses in the catenary or conductor rail, and by limiting voltage drop it allows substations to be further apart. NiMH batteries have the necessary energy storage density in terms of kWh/kg, and are slightly more expensive, but their life in terms of charge/discharge cycles in no way matches the LRV requirement for 2million cycles over 10 years. Flywheels have been tried but never caught on for several reasons.
Hans De Keulenaer

Technology Review: Storing Solar Power Efficiently - 0 views

www.technologyreview.com/...page1

storage technology usa

shared by Hans De Keulenaer on 02 Oct 07 - Cached
  • Their schemes come with a caveat, of course: without backup power plants or expensive investments in giant batteries, flywheels, or other energy-storage systems, this solar-power supply would fluctuate wildly with each passing cloud (not to mention with the sun's daily rise and fall and seasonal ebbs and flows). Solar-power startup Ausra, based in Palo Alto, thinks it has the solution: solar-thermal-power plants that turn sunlight into steam and efficiently store heat for cloudy days.
  • Solar proponents love to boast that just a few hundred square kilometers' worth of photovoltaic solar panels installed in Southwestern deserts could power the United States. Their schemes come with a caveat, of course: without backup power plants or expensive investments in giant batteries, flywheels, or other energy-storage systems, this solar-power supply would fluctuate wildly with each passing cloud (not to mention with the sun's daily rise and fall and seasonal ebbs and flows). Solar-power startup > Ausra > , based in Palo Alto, thinks it has the solution: solar-thermal-power plants that turn sunlight into steam and efficiently store heat for cloudy days. >
Hans De Keulenaer

Electronic Component Suppliers - Electricity Storage Association - electric utility, esco - 0 views

electricitystorage.org/...es_comparisons_capitalcost.htm

batteries costs energy management flywheels power quality storage

shared by Hans De Keulenaer on 10 Jun 08 - Cached
  • While capital cost is an important economic parameter, it should be realized that the total ownership cost (including the impact of equipment life and O&M costs) is a much more meaningful index for a complete economic analysis. For example, while the capital cost of lead-acid batteries is relatively low, they may not necessarily be the least expensive option for energy management (load leveling) due to their relatively short life for this type of application.
Hans De Keulenaer

California ISO: Integration of Renewable Resources Program (IRRP) - 0 views

www.caiso.com/...1c51c7946a480.html

batteries electricity flywheels large-scale storage usa networks

shared by Hans De Keulenaer on 10 Jun 08 - Cached
  • In support of the State of California Renewables Portfolio Standard, the California ISO (CAISO) has worked with Participating Transmission Owners, the California Energy Commission, the California Public Utilities Commission, industry experts, adjacent control areas and owners/developers of renewable resources to identify integration issues and solutions for the integration of large amounts of renewable resources into the CAISO Control Area.
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