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davidchapman

Server farms go solar - Oct. 4, 2007 - 1 views

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    That's why a small server-farm company called AISO.net (for "affordable Internet services online") has gone completely off the grid. Located 80 miles southeast of Los Angeles in the desert hamlet of Romoland, AISO.net has flanked its 2,000-square-foot building with two banks of ground-mounted solar panels, which generate 12 kilowatts of electricity. Batteries store the juice for nighttime operation.
Hans De Keulenaer

IEEE Spectrum: Can plug-in hybrid electric vehicles keep the electric grid stable? - 0 views

  • After safety, the longevity of the batteries in a plug-in hybrid is the greatest unknown. Can a plug-in hybrid’s battery pack retain the bulk of its energy capacity over 10 years of daily use and more than 4000 full-discharge cycles? (For a deeper look at the challenges facing plug-in hybrid batteries, see “Lithium Batteries Take to the Road”.)[ LINK: http://www.spectrum.ieee.org/sep07/5490 ] As Don Hillebrand of Argonne National Laboratory, in Illinois, said tartly, “Batteries are the showstopper.” Periodic demands from the grid, even for only a small fraction of the battery’s stored energy, would clearly affect the cells’ life span—but no one has data on how much. Another open issue is the development of creative financing models for replacement battery packs costing several thousand U.S. dollars even after mass production is achieved. Third-party battery leasing could be one answer, if combined with a secondary market for batteries whose performance has fallen below automotive levels. Carmakers, electric utilities, and large consumer-financing groups are quietly batting around these notions to see if they can build a financial model that makes sense for all three parties.
Hans De Keulenaer

Internet Eats Up Nearly 10% of U.S. Electricity - Switched: Gadgets, Tech, Digital Stuff for the Rest of Us - 0 views

  • Data compiled by research firm Uclue indicates that the Internet burns 9.4 percent of all electricity consumed in the U.S., and 5.3 percent worldwide.
Hans De Keulenaer

Statistics - 0 views

  • Slum Estimates Data
davidchapman

Pros seem to outdo cons in new phone charger standard | CNET News.com - 0 views

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    The spaghettilike nightmare that forms many consumers' collection of phone chargers, headset connectors and data cables could be set to end after a major mobile-industry forum agreed to standardize on one type of connector.
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    A small backward step for copper, but a giant leap forward for sustainability. Now do the same thing for laptops please.
davidchapman

Hosting provider gains power efficiencies through switch to DC power | News | ZERODOWNTIME Magazine - 0 views

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    UK managed hosting provider Ultraspeed has announced the roll-out of a unique combination of technology designed to deliver a next generation hosting service with dramatically enhanced reliability and a reduction in power consumption estimated at 40%. To achieve this, the company is using an innovative blend of measures which includes the adoption of DC power, a 'diskless' server environment and the latest Intel Xeon 5300 low-voltage quad core processors.
Hans De Keulenaer

Research - 0 views

  • We examine the potential economic implications of using vehicle batteries to store grid electricity generated at off-peak hours for off-vehicle use during peak hours. Hourly electricity prices in three U.S. cities were used to arrive at daily profit values, while the economic losses associated with battery degradation were calculated based on data collected from A123 Systems LiFePO4/Graphite cells tested under combined driving and off-vehicle electricity utilization. For a 16 kWh vehicle battery pack, the maximum annual profit with perfect market information and no battery degradation cost ranged from ~$140 to $250 in the three cities. If the measured battery degradation is applied, however, the maximum annual profit (if battery pack replacement costs fall to $5,000 for a 16 kWh battery) decreases to ~$10-$120. It appears unlikely that these profits alone will provide sufficient incentive to the vehicle owner to use the battery pack for electricity storage and later off-vehicle use. We also estimate grid net social welfare benefits from avoiding the construction and use of peaking generators that may accrue to the owner, finding that these are similar in magnitude to the energy arbitrage profit.
Colin Bennett

Study: India leads the pack in green server rooms - 0 views

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    About 63 percent of Indian IT shops have completed a retrofit of existing server rooms to increase energy efficiency, or have a pilot project underway, according to a recent study. It's similar in Brazil, but IT companies there tend to favor building new server rooms before modifying existing ones.
Colin Bennett

Pentadyne flywheels ready for railroads - 1 views

  • 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.
frank smith

Hydrogen Data Resource Center: Hydrogen Calculator - 2 views

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    "You can use this calculator to obtain the heating value of a given mass or volume of hydrogen or other fuels, or to calculate the mass or volume given a certain heating value. Choose whether you want to convert to heating value or to mass/volume, and then choose the fuel type. Then enter the value you want to convert and its units, and click Convert to initiate the conversion."
Colin Bennett

Renewables Supply 10 Percent of U.S. Energy - 1 views

  • According to the most recent issue of the “Monthly Energy Review” by the U.S. Energy Information Administration (EIA), renewable energy (i.e., biofuels, biomass, geothermal, hydroelectric, solar, wind) provided 10.51% of domestic U.S. energy production during the first nine months of 2009 – the latest time-frame for which data has been published.
Colin Bennett

Sizing the smart appliance opportunity - 1 views

  • AHAM lists the following six key features associated with smart appliances: Dynamic electricity pricing information is delivered to the user It can respond to utility signals Integrity of its operation is maintained while automatically adjusting its operation to respond to emergency power situations and help prevent brown or blackouts The consumer can override all previously programmed selections or instructions from the Smart Grid, while ensuring the appliance‘s safety functions remain active When connected through a Home Area Network and/or controlled via a Home Energy Management system, smart appliances allow for a total home energy usage approach. This enables the consumer to develop their own energy usage profile and use the data according to how it best benefits them It incorporates features to target renewable energy by allowing for the shifting of power usage to an optimal time for renewable energy generation, i.e., when the wind is blowing or sun is shining According to a research piece written by Zpryme, the smart appliance market is projected to grow from $3.06 billion in 2011 to $15.12 billion in 2015, with the U.S. accounting for 46.6 percent of that in 2011 and 36 percent in 2015. By contrast, China is expected to have an 11.6 percent share in 2011 and an 18.2 percent share in 2015. What's more, there are some strong drivers to smart appliance investment: Pricing: Bringing smart appliances to the mainstream means aligning ecological innovation with affordability Environment: With the build-out of metering and real-time pricing, consumers will see economic and environmental incentives for reducing power consumption first hand with their smart appliances Energy efficiency: When a consumer buys an appliance, they commit to paying both the first cost and the operating cost for the life of the product. And over the existence of the appliance, the energy cost to run it could be significantly greater than the initial cost Smart grid build-out: Smart appliance growth relies heavily on how quickly smart grid infrastructure can be rolled-out and readily accessible to communities Government subsidies: Like the Cash for Appliances program in the U.S., governments could and should play an active role in furthering the smart appliance agenda
Hans De Keulenaer

European & US Renewable Energy Targets | Renewable Energy World Magazine Article - 0 views

  • Latest data show, however, that in 2010, the indicative targets the member states set themselves for the electricity and transport sector were missed by most member states and the EU overall.
  • 'It is the fifth consecutive year that renewables have accounted for more than 40% of new electricity generating installations,' said Zervos.
  • By 2035, 80% of America's electricity will come from clean energy sources'.
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    Possible article: Transatlantic ping-pong on renewable targets.
Ty LaStrapes

Ten Brighter Ideas? An Explorable Explanation - 2 views

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    We're given guidelines as soundbites, catchy but insubstantial. We trust them blindly, not knowing whether our actions make any significant impact. Digital documents aren't subject to the constraints of paper. We should hold modern propaganda to a higher standard. By all means, be catchy, eloquent, passionate, and inspiring. But we must be able to dive through the pretty words to see the data and sources beneath.
Hans De Keulenaer

European noise map - 2 views

  • NOISE is the Noise Observation and Information System for Europe maintained by the European Environment Agency (EEA) through the European Topic Centre on Land Use and Spatial Information (ETC LUSI). It contains data related to strategic noise maps delivered in accordance with European Directive 2002/49/EC relating to the assessment and management of environmental noise.
Colin Bennett

Smart Plugs (TalkingPlugs) for Your Home - 1 views

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    "Google's PowerMeter can monitor home energy usage in great detail as well but it generally requires that an electrician install a smart meter or a home energy display. LaMonica reported a couple months ago that IBM and the utility company Consert have been working together on a smart grid program where major appliances can be hooked up to controllers and can communicate with a meter in much the same way as these TalkingPlugs do. With this system, a person can view the data and even control appliances on the web as well. The end use is much the same as these TalkingPlugs."
Hans De Keulenaer

Emissions from Photovoltaic Life Cycles - 0 views

  • Photovoltaic (PV) technologies have shown remarkable progress recently in terms of annual production capacity and life cycle environmental performances, which necessitate timely updates of environmental indicators. Based on PV production data of 2004–2006, this study presents the life-cycle greenhouse gas emissions, criteria pollutant emissions, and heavy metal emissions from four types of major commercial PV systems: multicrystalline silicon, monocrystalline silicon, ribbon silicon, and thin-film cadmium telluride. Life-cycle emissions were determined by employing average electricity mixtures in Europe and the United States during the materials and module production for each PV system. Among the current vintage of PV technologies, thin-film cadmium telluride (CdTe) PV emits the least amount of harmful air emissions as it requires the least amount of energy during the module production. However, the differences in the emissions between different PV technologies are very small in comparison to the emissions from conventional energy technologies that PV could displace. As a part of prospective analysis, the effect of PV breeder was investigated. Overall, all PV technologies generate far less life-cycle air emissions per GWh than conventional fossil-fuel-based electricity generation technologies. At least 89% of air emissions associated with electricity generation could be prevented if electricity from photovoltaics displaces electricity from the grid.
Hans De Keulenaer

MIT World » : Global and Regional Climate Change: Underlying Science and Emerging Riddles - 0 views

  • Veerabhadran Ramanathan recaps 35 years of key findings, and brings his audience up to date on the latest climate data, models, and observations which together demonstrate how CO2 is but one piece of a complex puzzle.
Arabica Robusta

ZCommunications | The Search for BP's Oil by Naomi Klein | ZNet Article - 1 views

  • Normally these academics would be fine without our fascination. They weren't looking for glory when they decided to study organisms most people either can't see or wish they hadn't. But when the Deepwater Horizon exploded in April 2010, our collective bias toward cute big creatures started to matter a great deal. That's because the instant the spill-cam was switched off and it became clear that there would be no immediate mass die-offs among dolphins and pelicans, at least not on the scale of theExxon Valdez spill deaths, most of us were pretty much on to the next telegenic disaster. (Chilean miners down a hole—and they've got video diaries? Tell us more!)
  • Mike Utsler, BP's Unified Area Commander, summed up its findings like this: "The beaches are safe, the water is safe, and the seafood is safe." Never mind that just four days earlier, more than 8,000 pounds of tar balls were collected on Florida's beaches—and that was an average day. Or that gulf residents and cleanup workers continue to report serious health problems that many scientists believe are linked to dispersant and crude oil exposure.
  • For the scientists aboard the WeatherBird II, the recasting of the Deepwater Horizon spill as a good-news story about a disaster averted has not been easy to watch. Over the past seven months, they, along with a small group of similarly focused oceanographers from other universities, have logged dozens of weeks at sea in cramped research vessels, carefully measuring and monitoring the spill's impact on the delicate and little-understood ecology of the deep ocean. And these veteran scientists have seen things that they describe as unprecedented. Among their most striking findings are graveyards of recently deceased coral, oiled crab larvae, evidence of bizarre sickness in the phytoplankton and bacterial communities, and a mysterious brown liquid coating large swaths of the ocean floor, snuffing out life underneath.
  • ...3 more annotations...
  • All this uncertainty will work in BP's favor if the worst-case scenarios eventually do materialize. Indeed, concerns about a future collapse may go some way toward explaining why BP (with the help of Kenneth Feinberg's Gulf Coast Claims Facility) has been in a mad rush to settle out of court with fishermen, offering much-needed cash now in exchange for giving up the right to sue later. If a significant species of fish like bluefin does crash three or even ten years from now (bluefin live for fifteen to twenty years), the people who took these deals will have no legal recourse.
  • A week after Hollander returned from the cruise, Unified Area Command came out with its good news report on the state of the spill. Of thousands of water samples taken since August, the report stated, less than 1 percent met EPA definitions of toxicity. It also claimed that the deepwater sediment is largely free from BP's oil, except within about two miles of the wellhead. That certainly came as news to Hollander, who at that time was running tests of oiled sediment collected thirty nautical miles from the wellhead, in an area largely overlooked by the government scientists. Also, the government scientists measured only absolute concentrations of oil and dispersants in the water and sediment before declaring them healthy. The kinds of tests John Paul conducted on the toxicity of that water to microorganisms are simply absent.
  • Coast Guard Rear Adm. Paul Zukunft, whose name is on the cover of the report, told me of the omission, "That really is a limitation under the Clean Water Act and my authorities as the federal on-scene coordinator." When it comes to oil, "it's my job to remove it"—not to assess its impact on the broader ecosystem. He pointed me to the NOAA-led National Resource Damage Assessment (NRDA) process, which is gathering much more sensitive scientific data to help it put a dollar amount on the overall impact of the spill and seek damages from BP and other responsible parties.
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    Normally these academics would be fine without our fascination. They weren't looking for glory when they decided to study organisms most people either can't see or wish they hadn't. But when the Deepwater Horizon exploded in April 2010, our collective bias toward cute big creatures started to matter a great deal. That's because the instant the spill-cam was switched off and it became clear that there would be no immediate mass die-offs among dolphins and pelicans, at least not on the scale of theExxon Valdez spill deaths, most of us were pretty much on to the next telegenic disaster. (Chilean miners down a hole-and they've got video diaries? Tell us more!)
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