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Energy Net

Peak Energy: Better Wind Turbines - 0 views

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    Technology Review has an article on advances in wind turbine technology - Better Wind Turbines. ExRo Technologies, a startup based in Vancouver, BC, has developed a new kind of generator that's well suited to harvesting energy from wind. It could lower the cost of wind turbines while increasing their power output by 50 percent. The new generator runs efficiently over a wider range of conditions than conventional generators do. When the shaft running through an ordinary generator is turning at the optimal rate, more than 90 percent of its energy can be converted into electricity. But if it speeds up or slows down, the generator's efficiency drops dramatically. This isn't a problem in conventional power plants, where the turbines turn at a steady rate, fed by a constant supply of energy from coal or some other fuel. But wind speed can vary wildly. Turbine blades that change pitch to catch more or less wind can help, as can transmissions that mediate between the spinning blades and the generator shaft. But transmissions add both manufacturing and maintenance costs, and there's a limit to how much changing the blade angle can compensate for changing winds.
Energy Net

Quiet wind-turbine comes to U.S. homes - CNET News - 0 views

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    A home wind turbine already installed at 250 sites in Scotland is now being sold across the pond. Cascade Engineering said Monday the Swift wind turbine, for homes and other buildings, is available in the U.S. and Canada. (Credit: Cascade Engineering) The Swift tries to set itself apart from existing small wind turbines with a design that reduces noise. Also, the turbine can be attached to a home, rather than to a free-standing pole or tower. Like other wind turbines, the Swift has blades that turn and power a generator. But rather than the typical three blades, the Swift has five and a ring that goes around them. That "outer diffuser" ring cuts the noise level to 35 decibels and reduces vibration, according to the company.
Energy Net

Peak Energy: A North American Wind Energy Scenario - 0 views

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    I've got another guest post from Neil Howes up at TOD, this one proposing a rough plan for North AMerica to obtain 50% of its power from wind by 2030 - A North American Wind Energy Scenario. Would a "50% of electricity generated by wind scenario" work in North America by 2030? In this post, I make a rough cut estimate of what might be required to make such a transition in about 20 years time. Most proposals that are being made rely on a very big increase in carbon free energy, both to charge electric vehicles (EV's) and to replace oil and natural gas (NG) presently used for hot water and space heating. In this post, I lay out a path by which 50% of North American energy might come from wind by 2030, including replacement of a large share of oil and natural gas use by electricity. ... High quality wind resources (wind speeds greater than 6.9m/sec) in the US are estimated to be >5,500GWa, about x10 all of N America's present electricity production of 550GWa. Canada's potential appears to be similar or greater than the US, while Mexico's wind resources are more limited (these figures do not include deep offshore resources that could be harnessed by floating wind turbines or higher altitude wind resources that could potentially be harnessed by airborne wind turbines).
Energy Net

Technology Spotlight: Wind Turbines - Renewable Energy World - 0 views

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    At the recently held EWEC 2009 wind energy conference and exhibition most exhibitors agreed that while there has been a substantial business slowdown due to problems linked to obtaining wind project financing, an upturn in demand during the second half of 2009 is beginning to play out, at least in the U.S. Other exhibitors, on the other hand, were a bit more cautious pointing out that substantial numbers of unsold turbines from framework contracts failing to secure project finance are now floating on the wind market. Most interesting from a wind technology point of view is the V112-3.0MW switch away from a compact V90-3.0MW integrated gearbox and main bearing assembly to a 3-point gearbox support. The application of a permanent magnet (PM) type generator with full converter system in the V112-3.0MW is new for Vestas but not for the wind industry. New Technology Trends In what many wind industry insiders consider a major development trend, French aerospace companies EADS Astrium & EADS Composite Aquitaine announced their formal entrance into the wind industry. The French companies offer the wind industry advanced composite materials engineering, manufacturing and related know-how as well as rotor-blade manufacturing capacity.
Energy Net

Inhabitat » Groundbreaking Energy Ball Wind Turbine for Home Power - 0 views

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    Swedish company Home Energy recently revealed an innovative wind turbine that spins in a spherical formation. Eschewing traditional rotors for a sleek orb structure, this beautiful rethinking of conventional wind turbine design utilizes the Venturi principle, which funnels wind within the turbine's blades. The resulting spherical wind turbine features increased efficiency and lower noise levels - making it ideal for small scale energy needs such as personal home use. Best of all it's called the Energy Ball: the fun name is an added bonus.
Energy Net

Sea Power: Germany's First Offshore Wind Park Goes Online - SPIEGEL ONLINE - News - International - 0 views

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    Germany's first offshore wind farm has gone online off the North Sea island of Borkum. A year late and 50 million euros over budget, it's still the best hope proponents of green energy have for meeting the country's ambitious emissions reductions targets. Electricity generated by Germany's first offshore wind energy park began streaming into the national network on Wednesday as three wind turbines located 45 kilometers (28 miles) north of the North Sea island of Borkum went online. The three wind turbines are massive. Each towers more than 100 meters (328 feet) above the waves, with blades spanning more than 116 meters. Individually, the wind turbines are capable of generating 5 megawatts of energy per year. The initial trio will be joined later this year by nine more wind turbines. When all 12 go online later this year, the installation is expected to provide enough electricity to power 50,000 homes.
Energy Net

ENN - Small Wind Beginning to Make a Big Difference - 0 views

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    The U.S. market for small wind turbines grew 78% last year, highlighting heightened interest in, demand for, and use of distributed alternative and renewable power systems. A total 17.3 megawatts worth of new small wind turbines--defined as wind turbines with generation capacities of 100 kilowatts and less--was installed in 2009, according to a report by the American Wind Energy Association released May 28. "Consumers are looking for affordable ways to improve their energy security and reduce their personal carbon footprint," said Ron Stimmel, AWEA's Small Wind Advocate. "Small wind technology can be an answer to that search. As government policies have caught up with consumer interest, we're seeing people all across the U.S. take advantage of this abundant, domestic natural resource and U.S. manufacturers have been able to meet this increasing demand."
Energy Net

Peak Energy: Tidal power gets a boost from propeller and wind turbine techonology - 0 views

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    The Guardian has a report on some new tidal power technology from a company in Wales inspired by ship propellers and wind turbines - Tidal power gets a boost from propeller and wind turbine techonology. Propellers on ships have been tried and tested for centuries in the rough and unforgiving environment of the sea: now this long-proven technology will be used in reverse to harness clean energy from the UK's powerful tides. The tides that surge around the UK's coasts could provide up to a quarter of the nation's electricity, without any carbon emissions. But life in the stormy seas is harsh and existing equipment - long-bladed underwater wind turbines - is prone to failure.A Welsh renewable energy company has teamed up with ship propulsion experts to design a new marine turbine which they believe is far more robust.
Energy Net

Peak Energy: Wind power could meet all US electricity needs - 0 views

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    The LA Times has an article on a new report noting that wind power could meet the entire electricity demand in the US - Wind turbines could more than meet U.S. electricity needs, report says. Wind turbines off U.S. coastlines could potentially supply more than enough electricity to meet the nation's current demand, the Interior Department reported Thursday. Simply harnessing the wind in relatively shallow waters -- the most accessible and technically feasible sites for offshore turbines -- could produce at least 20% of the power demand for most coastal states, Interior Secretary Ken Salazar said, unveiling a report by the Minerals Management Service that details the potential for oil, gas and renewable development on the outer continental shelf. The biggest wind potential lies off the nation's Atlantic coast, which the Interior report estimates could produce 1,000 gigawatts of electricity -- enough to meet a quarter of the national demand.
Energy Net

Is wind power worth it? Find out online | Energy and Fuel - 0 views

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    Not sure whether a wind turbine on your property would generate enough energy to be worth the effort? Stew no more: the Carbon Trust has launched a new "Wind Yield Estimation Tool" on its Website. The tool lets users calculate their annual mean wind speed, potential energy generation and carbon savings based on postcode, landscape and type of wind turbine. According to the Carbon Trust, the tool is the "most rigorous of its kind" and is based on 30 years of data from the Met Office's 220 weather stations.
Energy Net

Europe's Largest Onshore Wind Farm Switched on in Scotland - 0 views

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    Renewable Energy World has a report on a new Scottish wind farm - Europe's Largest Onshore Wind Farm Is Switched on in Scotland. Today, the final phase of Europe's largest onshore wind farm is being turned on in Scotland. The 322-megawatt (MW), 140-turbine Whitelee wind farm was built by ScottishPower Renewables, which is part of the Spanish power business Iberdrola. In Spain and internationally, the Iberdrola Group, is the world's largest developer of wind power, with nearly 9700 MW of installed capacity. The wind farm uses Siemens 2.3-MW machines. Positioned 370 meters (1200 feet) above sea level, 15 kilometers (9 miles) outside of Scotland's largest city, Glasgow, the new wind farm has over half a million people living within a 30-km radius of it. It's one of the first large-scale wind farms to be constructed close to a large population center. The first phase of the wind farm started feeding power into the grid in January 2008.
Energy Net

DONG, Siemens sign 'world's largest offshore wind' pact | Energy and Fuel - 0 views

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    Denmark's DONG Energy and Siemens today announced they've signed off on "the world's largest offshore wind turbine agreement." Under the pact, Siemens will deliver up to 500 wind turbines for DONG's development of offshore wind energy installations in northern Europe. Once deployed, the turbines are expected to have a total power-generating capacity of 1,800 megawatts.
xlisa123

polo ralph lauren sale The research - 0 views

The oxygen is released into the air, and the lithium ions are stored in the battery as lithium metal after capturing the electrons.When the battery discharges, it chemically consumes oxygen from th...

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Energy Net

Peak Energy: Improving Wind Turbines - 0 views

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    Grist has a post on new ideas for improving wind power technology, pointing to a Tyler Hamilton "Clean Break" column in the Toronto Star - Wind turbines get fancy. Solar energy sucks up a lot of research attention, partly because solar energy systems still have so much room for improvement. Wind turbines, on the other hand, have been around for over 1,000 years, and although the modern versions are vastly larger and more efficient than their ancient counterparts, the basic concept hasn't changed much. But the standard blades-on-a-horizontal-axle version of wind energy systems (as opposed to more exotic flavors like kites or blimps) may yet be poised for some big leaps forward, several of which were profiled in a recent Clean Break column.
Energy Net

Peak Energy: Home Wind Turbines - 0 views

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    TreeHugger has a post on micro-wind power devices for the home - Hot Home Wind Turbines You Can Actually Buy, Plus One You Wish You Could. Though solar panels definitely hog the renewable energy stage when it comes to home installations, a number of new, innovative wind turbines have entered the market in the past couple of months. Not all of these are intended to be mounted on your roof, some you'll need a bit of a yard (and a dearth of neighbors) to install and they vary in price from affordable to "when am I going to actually pay this off?", but they all go to show that there's more than one way to harness the wind to generate electricity. Check 'em out...
Energy Net

REpower To Unveil 6.1-MW Wind Turbine - Renewable Energy World - 0 views

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    In addition to the its 5M wind turbine series that is currently in production, REpower now has the most powerful wind turbine in the world in its portfolio. Development of the REpower 6M turbine series will be unveiled at the Hanover Trade Fair this week. REpower said that the rated electrical power of the units is 6.15 megawatts (MW).
Energy Net

Boomtown Bremerhaven: The Offshore Wind Industry Success Story - Renewable Energy World - 0 views

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    Formerly a region of high-unemployment, the German port of Bremerhaven has experienced a remarkable economic upturn, transforming into a major offshore wind power know-how centre and more. At least four of Germany's North Sea and Baltic Sea major ports have been transformed into the country's main wind industry logistical centres and/or equipment manufacturing/supply bases during the past few years. 'Of the €500 million invested for offshore wind power development along the German North Sea coastal region during the past years, about half came to Bremerhaven.' -- Jan Rispens, Managing Director, Windenergie Agentur Bremerhaven/Bremen (WAB) Emden serves as a main export harbour for Enercon wind turbines, and the German market leader operates a large concrete tower manufacturing plant within Emden's boundaries. BARD Engineering chose Emden as its offshore wind turbine assembly and rotor blade manufacturing location, while part of BARD's Tripile offshore foundations are being manufactured by a subsidiary company in Cuxhaven. Both BARD and Enercon have, in addition, built a foundry in the region, aimed at providing at least part of their individual demand for heavy-cast components.
Energy Net

WindFarm Estinnes Takes Wind Power to a New Scale - Renewable Energy World - 0 views

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    At the end of May, Renewable Energy World's Eize de Vries was invited to Belgium to view the construction of a wind farm that may be providing a view of the future. And a genuine wind industry innovation, Eize de Vries reports, is that the advanced E-126 built-in power electronics will actively contribute towards stabilizing the transmission grid voltage within the entire region. WindFarm Estinnes S.A. is an onshore wind farm that will comprise eleven of the latest generation of Enercon's E-126 direct drive wind turbines, a machine currently rated at 6 megawatts. Each E-126 has a 127-metre rotor diameter - combined with the 135-metre the turbine has a total 198.5 metre installation height. WindVision's Estinnes is expected to generate at least 187,000 MWh per year. And a genuine wind industry innovation, Eize de Vries reports, is that the advanced E-126 built-in power electronics will actively contribute towards stabilizing the transmission grid voltage within the entire region.
eco20-20

Air-x Airx12v Land Wind Turbine: Wind Turbines: Eco20/20 - 0 views

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    The AIR-X is the world's largest selling small wind turbine. It has the newest technology which provides it the features of mega watt class wind turbines.
Energy Net

Five metro cities erecting wind-power turbines | StarTribune.com - 1 views

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    Despite some naysayers, wind power turbines are being erected in five cities in the metro area; Anoka's is near the high school. Wind power turbines are going up in five metro cities, with Anoka set to get one on Monday, as a multi-city consortium moves forward with plans to use recycled windmills to generate renewable energy.
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    Despite some naysayers, wind power turbines are being erected in five cities in the metro area; Anoka's is near the high school. Wind power turbines are going up in five metro cities, with Anoka set to get one on Monday, as a multi-city consortium moves forward with plans to use recycled windmills to generate renewable energy.
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