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sankeyrya00

Wind Energy - 0 views

  • The BLM manages 20.6 million acres of public lands with wind potential. The BLM has authorized 39 wind energy development projects, including connected-action projects that include electric transmission support authorizations, with a total approved capacity of 5,557 megawatts, enough to supply the power needs of over 1.5 million homes. 
  • For more than a decade, wind energy has been the fastest growing energy technology worldwide, achieving an annual growth rate of over 30%. In the United States, the current total installed capacity is over 60,000 megawatts of wind projects.
dpurdy

Wind - Energy Explained, Your Guide To Understanding Energy - Energy Information Administration - 1 views

  • Wind is simply air in motion. It is caused by the uneven heating of the Earth's surface by the sun. Because the Earth's surface is made of very different types of land and water, it absorbs the sun's heat at different rates.
  • Wind is a renewable energy source because the Wind will blow as long as the sun shines.
conwayjam99

HowStuffWorks "Wind" - 0 views

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    "Wind is caused by differences in atmospheric pressure created, in large part, by the unequal heating of the earth's surface by the sun."
wellsann99

wind-energy-industry - 0 views

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    wind power in the U.S ending in 2008
dpurdy

NRDC: American Wind Farms - 2 views

  • Today, wind farms generate about 50,000 megawatts of clean, renewable energy -- the equivalent of the energy produced by 12 Hoover Dams.
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    "Today, wind farms generate about 50,000 megawatts of clean, renewable energy -- the equivalent of the energy produced by 12"
chakrabortyshi00

Tidal Power: Nature's renewable hydro electric engine: Additional info - 2 views

  • Tidal power energy is still being studied and developed, but in the future it could be a major renewable hydropower energy source.
  • England, for example, could supply over 10 percent of its electricity in this way.
  • . Wind and solar energy generators convert much less.
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  • They can convert about 80 percent of the energy into electricity
  • Another disadvantage is that the start-up costs involved are very high and a lot of time is required for the construction projects, which can cost millions of dollars and take up to 10 years to build
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    Tidal hydropower energy has various advantages. The first of these is reliability and consistency. Other alternative energy sources like wind and solar can have varying amounts of energy generated depending on the weather conditions. Tidal power energy can generate electricity by the clock and indefinitely. This means that shortages can be easily avoided. In addition, tidal turbines are efficient when it comes to generating energy. They can convert about 80 percent of the energy into electricity. wind and solar energy generators convert much less. Of course, another great benefit of tidal power renewable energy is that it is environmentally friendly. There are no CO2 emissions that are damaging to the atmosphere or Sulfur Dioxide emissions responsible for acid rain.
cottonetar98

Price List | Bergey Wind PowerBergey Wind Power - 0 views

shared by cottonetar98 on 12 Mar 13 - No Cached
  • It’s like buying vs. renting a home. Over the next 10 years a typical homeowner or small business will pay $18,000 to over $50,000 in electric bills, at rates that often increase faster than inflation. When you choose a Bergey wind system you take the same monthly expense and invest it in a tangible asset. Once your Bergey turbine is paid off, you will enjoy more money in your pocket every month for the next 20 – 40 years. Tax credits and rebates make it affordable. Small wind turbines qualify for a 30% federal tax credit and, for businesses, accelerated depreciation.  USDA grants are available for farmers, ranchers, and rural businesses.  Many states offer additional incentives (see www.dsireusa.org).  These incentives make owning a Bergey wind turbine surprisingly affordable.
cheniermab99

Wind Turbines for Electricity - 1 views

shared by cheniermab99 on 12 Mar 13 - No Cached
  • In 2006, wind power supplied 0.6% of US electricity but reduced CO2 emission from electricity production by a full 1%.
  • What really matters is the cost to society. With current subsidy methods, it costs around 3¢/kWh
  •   One-Time Cost per kW Capacity (usage) Factor Fixed Cost per kWh Variable Cost per kWh Total Cost per kWh Gas Turbine $439 15% 5.2¢ 8.7¢ 13.9¢ Coal $1,338 90% 2.7¢ 1.9¢ 4.5¢ Nuclear $2,180 90% 4.3¢ 0.3¢ 4.6¢ Wind $1,254* 30% 7.5¢ 0.0¢ 7.5¢
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  • as coal is the worst source of CO2. Thirty years from now, wind power might be cutting global GHG emissions by 10%.
carusonepay99

How sustainable is wind power? | OregonLive.com - 0 views

  • When looking at a wind powered electric generator, many people see a permanent source of renewable electricity. The problem with this image is that wind generators have shorter life spans than the term “sustainable” would imply. Wooden windmills in Holland that used to power industrial machinery before the invention of steam engines were more durable than these picket lines of propellers along our Columbia Gorge. The composite material and rare earth chemicals they require are both perishable and costly to replace. More important, like fossil fuels, our planet has a finite supply of these materials. wind power is such an inefficient means of generating electricity that a world that seriously relied on it the way we do fossil fuels would run out of the limited resources needed to build and maintain them long before our present trends would exhaust our vast bounty of hydrocarbons.
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    "The first hard core environmentalist I ever encountered in life taught my 8th grade energy class at Estacada Junior High, a course that President Carter's brand new Department of Education had mandated upon us a decade before as a symbolic gesture to show he cared about America's energy future. Despite an overall policy of separating church and state, in this class it was the gospel that we would deplete all fossil fuels by the year 2000. Back when "2000" was preceded by "THE YEAR" it seemed so far away didn't it? The only lasting lesson this course taught me was a healthy skepticism of government mandated indoctrination."
rutalil00

How long has wind power been used? - Curiosity - 0 views

  • Windmills were first used to grind grain anywhere from 2000 to 4000 years ago in ancient Persia or Babylon;
  • The initial use of wind power was by Egyptians in 3000 B.C. to move their sailboats.
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    "The initial use of wind power was by Egyptians in 3000 B.C. to move their sailboats. windmills were first used to grind grain anywhere from 2000 to 4000 years ago in ancient Persia or Babylon; crusaders brought the windmill idea back to Europe with them in the 11th century A.D. In the 1930s, windmills in rural areas of the U.S. pumped water and generated electricity."
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    In the 1930s, windmills in rural areas of the U.S. pumped water and generated electricity.
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    The initial use of wind power was by Egyptians in 3000 B.C. to move their sailboats. windmills were first used to grind grain anywhere from 2000 to 4000 years ago in ancient Persia or Babylon; crusaders brought the windmill idea back to Europe with them in the 11th century A.D.
wellsann99

STELR :: wind ENERGY - 1 views

  • STEP 1: Moving air pushes against the blades of the turbine, which are tilted to the direction of the wind. This makes the blades spin. In the process, some of the kinetic energy of the moving air is transformed into the mechanical energy of the spinning blades. (The wind still has some kinetic energy as it flows away from the turbine.) STEP 2: The shafts and the gears inside the gear box transfer the mechanical energy of the turbine to the generator. (The gears make the drive shaft to the generator spin faster than the shaft connected to the blade hub.) STEP 3: The generator transforms mechanical energy into electrical energy.
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    steps to converting win power to electricty
conwayjam99

Wind Energy, Noise Pollution - Robert Bryce - National Review Online - 0 views

  • “headaches, ear pain, nausea, blurred vision, anxiety, memory loss,
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    "headaches, ear pain, nausea, blurred vision, anxiety, memory loss, are all symptoms from the noise of wind turbines 
dpurdy

HowStuffWorks "Do wind turbines kill birds?" - 0 views

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    Do wind generators kill birds?
dpurdy

Wave Energy: an Overview (Oxfordshire Climate Exchange) - 1 views

  • Waves are generated by winds blowing over the ocean surface.  Wave energy is effectively a stored and concentrated form of solar energy since the winds that produce them are caused by pressure differences in the atmosphere caused by the sun's differential heating of the earth's surface. Waves can efficiently transport energy for thousands of miles and retain their energy long after the winds that first created them have died down, which makes waves one of the most concentrated and consistent sources of renewable energy. 
  • Globally, the potential use of wave power is, unsurprisingly, limited to areas of the world where there are waves. On a global scale, this is dictated by global wind patterns, with the result that waves are more prevalent in the mid-latitudes (40-60(N/S), than nearer the equator where the lack of ocean wind is referred to as the 'doldrums'.  Interestingly, this potential for wave power contrasts with that of solar power, which is more effective in lower latitudes
    • dpurdy
       
      Location of wave power.
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  • it is widely anticipated that other types of renewable resources, including wave energy, will need to be developed in order to meet more challenging targets beyond 2020. 
  • As with most renewable energy sources, wave devices have no emissions during generation but the energy associated with the construction of the device does have small associated emissions.
    • dpurdy
       
      What do we need to do in the future to make this work.
  • it is essential that the current demonstration schemes are successful, to reassure future investors. The most important objective is to deploy full-size demonstration schemes in order to gain greater confidence in the most developed technologies (as in the EU's Atlas project). 
  • it will be necessary to significantly improve the network connections to the electricity suppliers.
bannonmel99

Uses of Wind Energy | eHow.com - 2 views

  • For hundreds of years mankind has been making use of the energy and power generated by wind. Whether it has been to travel the world, manufacture products, or in the modern age to generate electricity, wind has provided the means. And while there have been dozens of different methods over the years, new technology is still being invented to make even further use of this ancient power source.
  • Windmills were one of the second most widespread uses of Wind energy. The variety of uses that Windmills were put to included grinding grain, as well as pumping water, up until the industrial revolution where the Windmill was mostly replaced by the steam engine.
efana1

Wind turbines and migratory birds: A serious problem? - 0 views

  • Wind turbines are responsible for the deaths of between 10,000 and 40,000 birds each year, according to the American Bird Conservancy.
  • the Altamont Pass site kills the largest number of birds - about 4,700 each year
  • The American Wind Energy Association contends Wind turbines are far less lethal to birds than other man-made structures, such as Windows (responsible for more than 100 million deaths each year in the U.S.) and power lines (between 130 million and 174 million), or than cats, which remain the number one bird killer.
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  • bat deaths associated with turbines were three times that of the rate of birds, especially during their migratory season
buttlingzac97

About Wind Energy: Benefits of Wind - 3 views

  • Wind energy releases no pollution into the air or water, and does not contribute to global warming
  • "on average, each MWh of electricity generated in the U.S. results in the emission of 1,341 pounds of carbon dioxide (CO2)
  • his avoided CO2 equals over 1.8 million tons of carbon, enough to fill 180 trains, each 100 cars long, with each car holding 100 tons of carbon every year."
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  • iversifies the national energy portfolio and reduces America's reliance on imported fuels
rascoekat00

Tidal power - Wikipedia, the free encyclopedia - 1 views

  • The first tidal power station was the Rance tidal power plant built over a period of 6 years from 1960 to 1966 at La Rance, France.[8] It has 240 MW installed capacity.
  • Historically, tide mills have been used, both in Europe and on the Atlantic coast of North America. The incoming water was contained in large storage ponds, and as the tide went out, it turned waterwheels that used the mechanical power it produced to mill grain. [1] The earliest occurrences date from the Middle Ages, or even from Roman times.[2][3] It was only in the 19th century that the process of using falling water and spinning turbines to create electricity was introduced in the U.S. and Europe.[
  • Tides are more predictable than wind energy and solar power.
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  • relatively high cost and limited availability of sites with sufficiently high tidal ranges or flow velocities, thus constricting its total availability. However, many recent technological developments and improvements, both in design (e.g. dynamic tidal power, tidal lagoons) and turbine technology (e.g. new axial turbines, cross flow turbines), indicate that the total availability of tidal power may be much higher than previously assumed
  • Tidal stream generator Main article: Tidal stream generator Tidal stream generators (or TSGs) make use of the kinetic energy of moving water to power turbines, in a similar way to wind turbines that use wind to power turbines. Some tidal generators can be built into the structures of existing bridges, involving virtually no aesthetic problems. Likewise, “tidal bridging” is a relatively new advancement that is gaining recognition as a more practical and beneficial way to generate tidal power. Blue Energy Canada is a company that is focused on building bridges to match today's demands. [9]
  • The first study of large scale tidal power plants was by the US Federal Power Commission in 1924 which if built would have been located in the northern border area of the US state of Maine and the south eastern border area of the Canadian province of New Brunswick, with various dams, powerhouses and ship locks enclosing the Bay of Fundy and Passamaquoddy Bay (note: see map in reference). Nothing came of the study and it is unknown whether Canada had been approached about the study by the US Federal Power Commission.[10] There was also a report on the international commission in April 1961 entitled " Investigation of the International Passamaquoddy Tidal Power Project" produced by both the US and Canadian Federal Governments.
kurishkri00

US Wind Energy Market Takes Off - 0 views

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    The U.S. wind energy industry is continuing to pay off for those who have invested in it, both in terms of power generated as well as manufacturing and jobs. This is according to a pair of studies the DOE has made public. More than 13 GW of wind energy capacity was added onto the U.S.
rutalil00

Where Does Wind Energy Come from - Ask.com - 1 views

  • The terms 'wind energy' describe the procedure by which wind is employed to produce mechanical power or electricity.
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