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Energy Net

Over a Third of Power from New Energy - Study | NewEnergyNews - 0 views

www.renewableenergyworld.com/...of-power-from-new-energy-study

renewables nrel

shared by Energy Net on 10 Jun 10 - Cached
  • Energy Net on 10 Jun 10
     
    "t is a crucial, if geekish, point: Wind and solar power are NOT intermittent, they are VARIABLE. If someone talks about problems with the intermittencies of wind and solar energies, it is out of ignorance or to intentionally discredit them. Obviously, the sun does not always shine and the wind does not always blow but those things can be scheduled and forecasted and are no reasons whatsoever not to keep building wind power and solar energy as fast as is humanly possible. The Western Wind and Solar Integration Study, from the National Renewable Energy Laboratory (NREL) of the U.S. Department of Energy (DOE), says transmission system tools are now available that would allow the Mountain West and Southwestern states to get 35% of their electricity from wind and solar energies by 2017. All it will require, aside from the building of the wind and solar production capacity, is a change in the WestConnect group of grid operators' standard operating procedures."
davidchapman

The Energy Blog: American Electric Power to Install Six MW of NAS® Battery Storage - 0 views

thefraserdomain.typepad.com/...american.html

batteries storage wind

shared by davidchapman on 13 Sep 07 - Cached
  • davidchapman on 13 Sep 07
     
    American Electric Power annouced that it is expanding its use of large-scale battery technology on its electricity grid by installing six megawatts of sodium sulfur (NAS®) batteries for storage of electricity to enhance reliability, allow for continued load growth, provide support for weak sub-transmission systems, avoid equipment overload and to offset intermittent wind power. AEP will be adding stationary sodium sulfur (NAS®) battery technology in its West Virginia and Ohio service territories next year. The company will also work with wind developers to identify a third location for NAS battery deployment ...to help offset the intermittent nature of wind generation.
Colin Bennett

Move Over, Oil, There's Money in Texas Wind - New York Times - 0 views

www.nytimes.com/...23wind.html

usa wind

shared by Colin Bennett on 25 Feb 08 - Cached
  • The wind turbines that recently went up on Louis Brooks’s ranch are twice as high as the Statue of Liberty, with blades that span as wide as the wingspan of a jumbo jet.
  • Colin Bennett on 25 Feb 08
     
    A timely article to remind readers about the status of wind turbines in the US. No longer a marginal form of electrical generation, wind turbine installed capacity in the US is on the up. Apparently, wind already supplies about 1% American electricity, powering the equivalent of 4.5 million homes. However, in spite of advances in the wind field, electricity generated via wind turbines is at this time costlier than that generated from fossil fuels. Also, wind power has the disadvantage of being intermittent and unpredictable, but this matter may be overcome with battery storage in some cases.
Hans De Keulenaer

Will Wind Power Make the Grid Less Reliable? - 0 views

www.renewableenergyworld.com/...story

intermittency reliability wind

shared by Hans De Keulenaer on 15 Apr 08 - Cached
  • My question is about the grid and wind power. If we were to add wind power into the generation mix, would the grid still be as reliable as it is today?
Colin Bennett

The Energy Blog: Wind Power as a Baseload for Electric Power - 0 views

thefraserdomain.typepad.com/...wind-power-as-a.html

wind

shared by Colin Bennett on 17 Dec 07 - Cached
  • A study conducted by Stanford University confirmed that interconnected multiple wind farms can be used to provide baseload electric power. Interconnecting wind farms with a transmission grid reduces the power swings caused by wind variability and makes a significant portion of it just as consistent a power source as a coal power plant. "This study implies that, if interconnected wind is used on a large scale, a third or more of its energy can be used for reliable electric power, and the remaining intermittent portion can be used for transportation, allowing wind to solve energy, climate and air pollution problems simultaneously," said Archer, the study's lead author and a consulting assistant professor in Stanford's Department of Civil and Environmental Engineering.
Hans De Keulenaer

Study finds that linked wind farms can result in reliable power - 0 views

news-service.stanford.edu/...windfarm-120507.html

intermittency stanford transmission wind

shared by Hans De Keulenaer on 17 Dec 07 - Cached
  • Wind power, long considered to be as fickle as wind itself, can be groomed to become a steady, dependable source of electricity and delivered at a lower cost than at present, according to scientists at Stanford University. The key is connecting wind farms throughout a given geographic area with transmission lines, thus combining the electric outputs of the farms into one powerful energy source. The findings are published in the November issue of the American Meteorological Society's Journal of Applied Meteorology and Climatology.
Hans De Keulenaer

Ecological Economics: Exclusively Renewable Energy by 2050: Germany Says Yes! - 0 views

forestpolicy.typepad.com/...exclusively-ren.html

2050 ecological economics germany intermittency nuclear renewables video

shared by Hans De Keulenaer on 26 Jan 08 - Cached
  • Germany is looking to integrate wind, solar, and biofuel natural gas to supply 100% of its power generation needs by 2050 (40% by 2020). Germany plans to phase out both Nuclear and Coal-fired power generation.
  • Hans De Keulenaer on 26 Jan 08
     
    The problem is at least recognised, instead of declaring it a myth. But the video remains a concept. The numbers are not worked out, nor the economics. And while variability can be reduced by combining different renewables, nobody knows whether we will get it right 95, 99 or the current 99.9% of the time. 30 minutes of outage per year does not leave much margin for error.
Colin Bennett

Storing Solar Power In Molten Salt : MetaEfficient - 0 views

www.metaefficient.com/...olar-power-in-molten-salt.html

concentrated solar electricity storage

shared by Colin Bennett on 07 Jan 08 - Cached
  • Solar power is a truly efficient source of energy, but it tends to fluctuate, and, as you might know, it turns off at night. One clever way to alleviate this intermittence is to store solar energy in the form of heat using molten salt. An aerospace company, Hamilton Sundstra, has created a venture called SolarReserve, and it plans to have its first molten salt solar power plant online by 2010.
Colin Bennett

» Interconnecting wind farms | Emerging Technology Trends | ZDNet.com - 0 views

blogs.zdnet.com/emergingtech

wind

shared by Colin Bennett on 26 Nov 07 - Cached
  • Wind power is one the world’s fastest growing electric energy source, but as wind is intermittent, a single wind farm cannot deliver a steady amount of energy. This is why scientists at Stanford University want to connect wind farms to develop a cheaper and reliable power source. Interconnecting wind farms with a transmission grid should reduce the power swings caused by wind variability and provide a somewhat constant and reliable electric power (or ‘baseload’ power) provided by other power plants. The idea is attractive, but will the various companies involved with wind farms adopt it? Time will tell.
Hans De Keulenaer

Home Hydrogen Production ... An Emerging Revolution? | EcoGeek | Hydrogen, Power, Home, Itm, Production - 1 views

www.ecogeek.org/1035

hydrogen homes

shared by Hans De Keulenaer on 09 Oct 07 - Cached
  • This views electrolysers as a key path for dealing with the intermittency challenge. Again, a great vision, but the financial, infrastructure, and technical challenges must be judged against alternatives.
Hans De Keulenaer

R-Squared Energy Blog: Storing Renewable Energy - 0 views

i-r-squared.blogspot.com/...storing-renewable-energy.html

intermittency renewables storage

shared by Hans De Keulenaer on 16 Jul 07 - Cached
  • Molten salt is already used in some applications in the chemical industry to dampen temperature fluctuations in reactors.
  • davidchapman on 17 Jul 07
     
    The important point, missed in this page and the comments on it, is that the energy is stored as latent heat of fusion. The mass is effectively a constant temperature heat sink/source over a wide range. There is nothing new in the world of course - this approach was extensively studied at BICC Research in the early 70's for peak lopping/load shifting for heating systems. The materials studied then had melting points in the 30 - 40 C range, but I don't remember the latent heat values. At that time it was rejected as too large and heavy - then the oil crisis passed. How does it compare with flow cells?
Sergio Ferreira

After Gutenberg » Blog Archive » BrightSource Energy - 0 views

jcwinnie.biz/wordpress

storage weather

shared by Sergio Ferreira on 13 Sep 07 - Cached
  • A molten salt system1 is a means to store thermal energy, thus mitigating the problem of an intermittent source for generating electricity at night or during cloudy weather. It is one of Tom Konrad2’s top ten favorites for an alternative energy future because it’s cheaper to store heat than it is to store electricity and concentrating solar power can produce a ton of heat without pollution or fuel.
Hans De Keulenaer

Springwise: Wind power, still made here - 0 views

www.springwise.com/...wind_power_still_made_here

greening intermittency netherlands wind

shared by Hans De Keulenaer on 15 Aug 07 - Cached
  • Naturally, the electricity used by consumers in urban and suburban homes can't be derived directly from a specific source.
Hans De Keulenaer

Pearl Street Power: Wind & Storage: Better Together - 0 views

pearlstreetpower.blogspot.com/...d-storage-better-together.html

finance intermittency wind

shared by Hans De Keulenaer on 03 Aug 07 - Cached
  • Perhaps we would all take him more seriously should he admit that one major reason why wind energy proponents refuse to acknowledge the need for storage is that, without it, the wind industry will sell a whole lot more turbines, especially under current production tax credit subsidies and renewable portfolio mandates.
Hans De Keulenaer

Jim Rogers: US Leads in Nuclear Power Production - WSJ.com - 0 views

online.wsj.com/...4619004574324313479837876.html

usa nuclear leadership sustainability carbon electricity

shared by Hans De Keulenaer on 15 Aug 09 - Cached
  • Investing in new nuclear power plants, which produce electricity 24 hours a day and seven days a week, can be a major growth engine for our economy. Nuclear plants can be located close to growing demand centers, and next to existing transmission lines. Renewables, which produce power intermittently, must often be sited far from cities and the grid.
Hans De Keulenaer

Virtual power plants could tame coming grid chaos - tech - 11 June 2009 - New Scientist - 0 views

www.newscientist.com/...ld-tame-coming-grid-chaos.html

virtual power plants intermittency renewables

shared by Hans De Keulenaer on 15 Jun 09 - Cached
  • Fears over energy security and climate change have led to record investment in renewable energy. But a major problem threatens to stall progress towards a more sustainable future: national electricity grids are far from ready to cope with the variable output from the new technologies. A solution might be at hand, though, and would not involve radical changes to the existing infrastructure. Treating groups of dispersed power sources, such as solar and wind generators, as a single entity could solve the problem, creating the virtual equivalent of a single large power station.
Hans De Keulenaer

Virtual Power Plants Set To Potentially Change Power Structure | Renewable Energy News Article - 2 views

www.renewableenergyworld.com/...ntially-change-power-structure

smart smart grid integration renewables variability intermittency demand management virtual power plants

shared by Hans De Keulenaer on 20 Jan 11 - No Cached
  • Hans De Keulenaer on 20 Jan 11
     
    Will the IT sector deliver the smart grid?
Hans De Keulenaer

A Better Way to Make Fuel from Solar Energy | MIT Technology Review - 1 views

www.technologyreview.com/...n-to-solar-power-intermittency

gas renewables efficiency emissions

shared by Hans De Keulenaer on 30 Apr 13 - No Cached
  • Burning natural gas emits about half as much carbon dioxide as burning coal, but it still produces large amounts of the greenhouse gas in the atmosphere. A novel device being developed at the Pacific Northwest National Laboratory (PNNL) could reduce those emissions by 20 percent by using heat from the sun to convert natural gas to an alternative fuel called syngas, a lower carbon fuel.
Hans De Keulenaer

Grid-scale energy storage applications in renewable energy integration: A survey - 2 views

www.sciencedirect.com/...S0196890414007018

storage renewables

shared by Hans De Keulenaer on 26 Aug 14 - No Cached
  • This paper examines both the potential of and barriers to grid-scale energy storage playing a substantive role in transitioning to an efficient, reliable and cost-effective power system with a high penetration of renewable energy sources. Grid-scale storage is a term that describes a number of different technologies with a wide range of characteristics. This versatility leads to the use of storage to perform a number of grid-services. We first enumerate these services, with an emphasize on those that are best suited to mitigate the effects of uncertainty and variability associated with intermittent, non-dispatchable renewable energy sources. We then provide an overview of the current methods to evaluate grid-integrated storage, summarize key findings, and highlight ongoing challenges to large-scale adoption of grid-scale energy storage. We focus on one particular area that is critical to both the efficient use of energy storage in the power grid and its long-term economic viability: the conflict between the technical benefits of this resource, which can provide both power and energy related grid-services (in some cases simultaneously), and the economic challenges of compensating these services within the current market structures. We then examine recent progress in addressing these issues through regulatory changes and other initiatives designed to mitigate previous market failures. This discussion is followed by some remarks about ongoing regulatory and market design challenges. The paper closes with a summary of the ideas presented and a discussion of critical research needs.
Hans De Keulenaer

Grid Power Quality Improvements Using Grid-Coupled Hybrid Electric Vehicles with a Dual Energy Storage System | Leonardo ENERGY - 0 views

www.leonardo-energy.org/...3251

hybrids kuleuven power quality supercapacitors lithium

shared by Hans De Keulenaer on 10 Jun 08 - Cached
  • The paper discusses the use of a dual energy storage system based on batteries and supercapacitors in hybrid electric vehicles (HEV). The battery has a large energy density, enabling an all-electric driving range of 100 km, while the supercapacitor has a large power density and provides peak power during acceleration and regenerative breaking. The paper discusses the benefits and drawbacks of both storage systems and the specific requirements imposed by the hybrid drive train. Coupling such a HEV to the grid allows interaction between grid and HEV, providing the grid with a controllable load. Depending on the communication between the hybrid fleet and the grid, this load can be controlled by adjusting the electricity price in order to allow a higher penetration of intermittent renewable energy sources such as wind parks in the grid and if the communication allows the transmission system operator to reduce the load imposed on the grid by the hybrid fleet, the hybrid fleet can become part of the secondary frequency control reserve. In case of sudden demand or supply fluctuations, the hybrid fleet can assist in primary control of the grid. Due to the dual energy storage system the HEVs can also provide fast load tracking to keep the voltage in microgrids at the desired set point. An experimental setup with a battery, grid coupling and induction machine proves the feasibility of the concept.
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