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dpurdy

Biofuel crops may worsen global warming: study - CTV News - 0 views

www.ctv.ca/...biofuel_crops_080209

global warming

shared by dpurdy on 03 Nov 11 - No Cached
  • "Our study found that any biofuel that causes clearing of natural ecosystems will increase global warming," Joe Fargione, a scientist for The Nature Conservancy, told CTV.ca.
  • He said converting natural areas into croplands results in tons of carbon being emitted into the atmosphere -- a carbon 'debt' that outweighs any benefits.
  • anonymous on 28 Sep 13
     
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dpurdy

Enhanced geothermal energy - 0 views

nextbigfuture.com/...nhanced-geothermal-energy.html

geothermal potential future current

shared by dpurdy on 07 Nov 11 - Cached
  • Enhanced geothermal systems (EGS), also sometimes called engineered geothermal systems, offer great potential for more than 100 GW of geothermal power which 40 times more than present geothermal power.
  • ultimately geothermal global resources amount to 50,000 times the energy of all oil and gas resources in the world.
  • Enhanced Geothermal Systems (EGS) – Often categorized under the antiquated term‘Hot Dry Rock,’ EGS is thought by several experts to refer to any resource that requires artificial stimulation. This includes resources that have to be fully engineered, or ones that produce hydrothermal fluid, but sub-commercially. Regarding the latter, one expert states that, ‘As we go further, there might be projects that require more and more stimulation.’ Although EGS technology is still young and many aspects remain unproven, several projects are currently underway. If EGS technology proves commercially successful, it is expected to allow significantly increased extension of and production from existing fields, as well as utilization of geothermal energy in previously implausible locations.
  • anonymous on 05 Oct 13
     
    today hindi news,today news talmi,hindi news www.killdo.de.gg
crandallmad00

Tidal Energy : Advantages and Disadvantages - 0 views

www.ianswer4u.com/...dal-energy-advantages-and.html

tide wave

shared by crandallmad00 on 30 Sep 13 - No Cached
  • Advantages of Tidal Energy1)  It is an inexhaustible source of energy. 2)  Tidal energy is environment friendly energy and doesn't produce greenhouse gases. 3)  As 71% of Earth’s surface is covered by water, there is scope to generate this energy on large scale. 4)  We can predict the rise and fall of tides as they follow cyclic fashion. 5) Efficiency of tidal power is far greater as compared to coal, solar or wind energy. Its efficiency is around 80%. 6)  Although cost of construction of tidal power is high but maintenance costs are relatively low. 7)  Tidal Energy doesn’t require any kind of fuel to run. 8)  The life of tidal energy power plant is very long. 9)  The energy density of tidal energy is relatively higher than other renewable energy sources.
  • Disadvantages of Tidal Energy 1)  Cost of construction of tidal power plant is high. 2)  There are very few ideal locations for construction of plant and they too are localized to coastal regions only. 3)  Intensity of sea waves is unpredictable and there can be damage to power generation units. 4)  Influences aquatic life adversely and can disrupt migration of fish. 5)  The actual generation is for a short period of time. The tides only happen twice a day so electricity can be produced only for that time. 6)  Frozen sea, low or weak tides, straight shorelines, low tidal rise or fall are some of the obstructions. 7)  This technology is still not cost effective and more technological advancements are required to make it commercially viable. 8)  Usually the places where tidal energy is produced are far away from the places where it is consumed. This transmission is expensive and difficult. Tidal Energy is thus a clean source of energy and doesn’t require much land or other resources as in harnessing energy from other sources. However, the energy generated is not much as high and low tides occur only twice a day and continuous energy production is not possible.
  • crandallmad00 on 30 Sep 13
     
    Lets now discuss the advantages and
schmettererdav00

Biofuels: What happened to biofuels? | The Economist - 0 views

www.economist.com/...l-organic-matter-has-proved-be

biofuel current

shared by schmettererdav00 on 04 Oct 13 - No Cached
  • Ethanol, for instance, is an alcoholic biofuel easily distilled from sugary or starchy plants. It has been used to power cars since Ford’s Model T and, blended into conventional petrol, constitutes about 10% of the fuel burned by America’s vehicles today.
  • anonymous on 05 Oct 13
     
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nassiveradom00

U.S. geothermal infrastructure could support 7.2 million people | SmartPlanet - 0 views

www.smartplanet.com/...1318

current geothermal

shared by nassiveradom00 on 03 Nov 12 - No Cached
  • The geothermal energy process extracts heat from the Earth for the purpose of generating electricity to power homes. Most development in this area is concentrated at where tectonic plates meet, such as the western coasts of North and South America, the Mediterranean and east coast of Africa and East Asia.
  • The U.S. could have as much as 10 gigawatts of geothermal power at its disposal if current projects under development are completed, according to a new report.
  • U.S. geothermal infrastructure manages 3,100 megawatts, the new projects could add an additional 7,100 megawatts, or 7 gigawatts, of energy output.
  • dpurdy on 03 Nov 12
     
    "The U.S. could have as much as 10 gigawatts of geothermal power at its disposal if current projects under development are completed, according to a new report. According to a new report from the Geothermal Energy Association, there are 144 new geothermal projects in 14 U.S. states currently under development. While the current U.S. geothermal infrastructure manages 3,100 megawatts, the new projects could add an additional 7,100 megawatts, or 7 gigawatts, of energy output."
  • anonymous on 03 Oct 13
     
    Comprehensive up-to-date news coverage, aggregated from sources all over theworld by Google News.‎Finance - ‎About Google News - ‎Languages and regions - ‎Editors' Pickswww.killdo.de.ggNews Online from Australia and the World ...News headlines from Australia and the world. The latest national, world, business, sport, entertainment and technology news from News Limited news papers.www.killdo.de.ggBreaking News Updates | Latest News Headlines ...Breaking News, Latest News and Current News from FOXNews.com. Breakingnews and video. Latest Current News: U.S., World, Entertainment, Health, ...www.killdo.de.gg
stewartlia99

Infrastructure - 0 views

www.wind-energy-the-facts.org/...infrastructure

shared by stewartlia99 on 05 Nov 12 - No Cached
    • stewartlia99
      stewartlia99 on 05 Nov 12
       
      infrastructure
hardingmar00

Electricity from Geothermal Energy - 1 views

www.powerscorecard.org/tech_detail.cfm

convert geothermal

shared by hardingmar00 on 14 Mar 13 - No Cached
  • The heat from the earth's own molten core can be converted into electricity. This core consists primarily of extremely high temperature liquid rock known as magma. This "geothermal" heat circulates within the rock or is transferred to underground reservoirs of water, which also circulate under the earth's crust. Because of the near limitless ability of the earth to produce magma, and the continuous transfer of heat between subsurface rock and water, geothermal energy is considered a renewable resource.
  • faglejoh98 on 14 Mar 13
     
    "The heat from the earth's own molten core can be converted into electricity. This core consists primarily of extremely high temperature liquid rock known as magma. This "geothermal" heat circulates within the rock or is transferred to underground reservoirs of water, which also circulate under the earth's crust. Because of the near limitless ability of the earth to produce magma, and the continuous transfer of heat between subsurface rock and water, geothermal energy is considered a renewable resource. Geothermal resources have been harnessed as an energy source since the dawn of civilization, when natural hot springs were first used for cooking and bathing. The geothermal resources tapped to generate electricity are far more intense than those used for space heating and can reside as deep as 10,000 feet below the earth's surface. Capital costs for the construction of geothermal power plants are much higher than for large coal-fired plants or new natural gas turbine technologies. But geothermal plants have reasonable operation and maintenance costs and no fuel costs. Though more expensive than wind power in most cases, new geothermal electricity generation facilities are increasingly competitive with fossil options."
deepat00

Geothermal energy facts - Interesting energy facts - 0 views

interestingenergyfacts.blogspot.com/...geothermal-energy-facts.html

geothermal history

shared by deepat00 on 12 Mar 13 - No Cached
  • Geothermal energy supplies less than 10 % of the world's energy.
  • Geothermal energy is clean and safe for the surrounding environment.
  • Geothermal energy is sustainable because hot water can be re-injected into the ground.
  • ...11 more annotations...
  • Geothermal energy can be found in the form of volcanoes, hot springs and geysers.
  • Geothermal energy's advantage is also the fact that geothermal power stations are relatively small, and have a lesser impact on the environment than for instance hydroelectric plants.
  • Geothermal energy use has very low emissions of greenhouse gases to about three percent of the carbon dioxide emissions of a fossil power station.
  • Geothermal energy is extremely efficient (almost 100 %) energy source where only real source of losing energy is from turbine friction.
  • Geothermal energy has three main uses: Heating, Electricity generation and Geothermal heat pumps.
  • Geothermal energy's amount of electricity is less than 1 percent of total electricity produced in the USA.
  • Geothermal energy is giving 18 % of Iceland's total electricity.
  • Geothermal energy could produce 10 percent of US electricity by the year 2050.
  • Geothermal energy is used since ancient times in form of hot water.
  • Geothermal energy could supply US with more than 30,000 MW of power by 2025.
  • Geothermal energy has minimum negative environmental impact.
  • anonymous on 03 Oct 13
     
    Comprehensive up-to-date news coverage, aggregated from sources all over theworld by Google News.‎Finance - ‎About Google News - ‎Languages and regions - ‎Editors' Pickswww.killdo.de.ggNews Online from Australia and the World ...News headlines from Australia and the world. The latest national, world, business, sport, entertainment and technology news from News Limited news papers.www.killdo.de.ggBreaking News Updates | Latest News Headlines ...Breaking News, Latest News and Current News from FOXNews.com. Breakingnews and video. Latest Current News: U.S., World, Entertainment, Health, ...www.killdo.de.gg
dextereli99

SOLAR POWER BENEFITS - 0 views

www.vivasolar.com/solarpowerbenifits.html

solar sustainable cost pollution

shared by dextereli99 on 12 Mar 13 - No Cached
  • Advantages of solar power are many. Although solar power is an energy source that we have only recently tapped into, it may easily become the most important energy source of the future. • Solar power is a renewable and natural resource. • Solar power is non-polluting. Unlike oil, solar power does not emit greenhouse gases or carcinogens into the air. • Light and energy from the sun costs nothing. Once you purchase the equipment to collect and convert energy from the sun, it costs you nothing to run. • Solar cells require little maintenance. • Solar cells can last a lifetime. • Solar power is silent.
  • • Solar energy can be used to heat water, dry clothes, heat swimming pools, power attic fans, power small appliances, produce light for both indoors and outdoors, and even to power cars, among other things.
  • • Solar energy products can be very expensive. The initial cost is, perhaps, the main disadvantage of solar energy. • To reach maximum level of efficiency you need a relatively large area to install solar panels. • Depending where you live (Arizona vs. Alaska, around many shady trees or in the desert, etc.), you will get different results with solar energy systems.
  • ...3 more annotations...
  • • If you have a really good solar energy system, one that produces even more energy than you use, your utility company might buy that extra energy from you. • When you use solar energy, you and your home become independent on foreign or other sources of energy which raise costs quickly. • To run solar water pumps, you do not even need to connect to a gas or power grid. • Solar energy cannot be produced at night or if there is a lot of pollution in the air or clouds over the sun.
  • • Of course, realize you can have a battery backup system for your solar energy system that will take care of the problems that could arise when the sun does not. • You can install solar energy in remote locations. • If there is a power outage, but you run on solar, you will still have electricity! • As your energy needs grow, you can add more solar panels
  • • Technology for solar energy is constantly improving.
whalenkil98

Photovoltaics - Timeline of the History of Photovoltaics - 0 views

inventors.about.com/...Photovoltaics.htm

solar convert

shared by whalenkil98 on 12 Mar 13 - Cached
  • 1839: Nineteen-year-old Edmund Becquerel, a French experimental physicist, discovered the photovoltaic effect while experimenting with an electrolytic cell made up of two metal electrodes. 1873: Willoughby Smith discovered the photoconductivity of selenium.
  • kenyonlau99 on 12 Mar 13
     
    "Today's photovoltaic systems are used to generate electricity to pump water, light up the night, activate switches, charge batteries, supply power to the utility grid, and much more. 1839: Nineteen-year-old Edmund Becquerel, a French experimental physicist, discovered the photovoltaic effect while experimenting with an electrolytic cell made up of two metal electrodes. 1873: Willoughby Smith discovered the photoconductivity of selenium. 1876: Adams and Day observed the photovoltaic effect in solid selenium. 1883: Charles Fritts, an American inventor, described the first solar cells made from selenium wafers. 1887: Heinrich Hertz discovered that ultraviolet light altered the lowest voltage capable of causing a spark to jump between two metal electrodes. 1904: Hallwachs discovered that a combination of copper and cuprous oxide was photosensitive. Einstein published his paper on the photoelectric effect. 1914: The existence of a barrier layer in PV devices was reported. 1916: Millikan provided experimental proof of the photoelectric effect. 1918: Polish scientist Czochralski developed a way to grow single-crystal silicon. 1923: Albert Einstein received the Nobel Prize for his theories explaining the photoelectric effect. 1951: A grown p-n junction enabled the production of a single-crystal cell of germanium. 1954: The PV effect in Cd was reported; primary work was performed by Rappaport, Loferski and Jenny at RCA. Bell Labs researchers Pearson, Chapin, and Fuller reported their discovery of 4.5% efficient silicon solar cells; this was raised to 6% only a few months later (by a work team including Mort Prince). Chapin, Fuller, Pearson (AT&T) submitted their results to the Journal of Applied Physics. AT&T demonstrated solar cells in Murray Hill, New Jersey, then at the National Academy of Science Meeting in Washington, DC. 1955: Western Electric began to sell commercial licenses for silicon PV technologies; early successful products included PV-powered dolla
wellsann99

The Most Frequently Asked Questions about Wind Energy - 0 views

www.culturechange.org/wind.htm

fossil fuels pollution

shared by wellsann99 on 12 Mar 13 - No Cached
  • In 1997, U.S. power plants emitted 70% of the sulfur dioxide, 34% of carbon dioxide, 33% of nitrogen oxides, 28% of particulate matter and 23% of toxic heavy metals released into our nation's environment, mostly the air. These figures are currently increasing in spite of efforts to roll back air pollution through the federal Clean Air Act.
  • wellsann99 on 12 Mar 13
     
    wind power technology
mchughkon99

Tidal Power: Pros and Cons - 0 views

www.triplepundit.com/...tidal-power-pros-cons

tide history

shared by mchughkon99 on 12 Mar 13 - No Cached
  • Day and night, the vast waters of the ocean press and recede along the shorelines of Earth’s every continent in accordance to the celestial movements of our planet in relation to the sun and the moon
  • ay and night, the vast waters of the ocean press and recede along the shorelines of Earth’s every continent in accordance to the celestial movements of our planet in relation to the sun and the moon
  • Records of ocean power conversion date back to 900A.D. where the power of tidal movement was used to grind grains. The first modern commercial tidal power was installed off the coast of St. Malo, in Northern France. Installed in 1965, it has been operating continuously since then, producing 240 MW with every tide.
  • mchughkon99 on 12 Mar 13
     
    how the tides move to create energy
coreyemi99

What is Solar Energy? - 0 views

www.technologystudent.com/...solar1.htm

form

shared by coreyemi99 on 12 Mar 13 - No Cached
  • Solar power is energy from the sun and without its presence all life on earth would end. Solar energy has been looked upon as a serious source of energy for many years because of the vas
  • amounts of energy that are made freely available, if harnessed by modern technology.
  • coreyemi99 on 12 Mar 13
     
    What solar power is
bolendev99

Solar electricity PV (photovoltaic) panels explained - benefits, costs, savings, earnings, suitability - 1 views

www.energysavingtrust.org.uk/...Solar-panels-PV

solar sustainable

shared by bolendev99 on 08 Mar 13 - No Cached
  • bolendev99 on 08 Mar 13
     
    "The benefits of solar electricity Cut your electricity bills: sunlight is free, so once you've paid for the initial installation your electricity costs will be reduced. Get paid for the electricity you generate: the government's Feed-In Tariffs pay you for the electricity you generate, even if you use it. Sell electricity back to the grid: if your system is producing more electricity than you need, or when you can't use it, you can sell the surplus back to the grid. Cut your carbon footprint: solar electricity is green, renewables energy and doesn't release any harmful carbon dioxide] or other pollutants. A typical home solar PV system could save over a tonne of carbon dioxide per year - that's more than 30 tonnes over its lifetime. "
parkergar99

A Quiet Breakthrough in Geothermal Energy - Businessweek - 1 views

www.businessweek.com/...akthrough-in-geothermal-energy

geothermal energy cost

shared by parkergar99 on 08 Mar 13 - No Cached
  • Geothermal power has massive potential in many areas of the U.S. but it has long remained a niche technology.
  • vanierfel98 on 08 Mar 13
     
    Talks about how much potential there is
  • parkergar99 on 11 Mar 13
     
    "While traditional geothermal can be cheaper than coal power, enhanced geothermal systems are generally more expensive than traditional ones. But being able to create multiple geothermal zones from one well brings down the overall cost of enhanced geothermal by 50 percent, Petty said."
rascoekat00

Tidal Power - How Tidal Power Plants Work - 0 views

inventors.about.com/...tidal_power.htm

tidal energy

shared by rascoekat00 on 11 Mar 13 - Cached
  • Tidal power traditionally involves erecting a dam across the opening to a tidal basin. The dam includes a sluice that is opened to allow the tide to flow into the basin; the sluice is then closed, and as the sea level drops, traditional hydropower technologies can be used to generate electricity from the elevated water in the basin. Some researchers are also trying to extract energy directly from tidal flow streams.
  • Another form of ocean energy is called tidal energy. When tides comes into the shore, they can be trapped in reservoirs behind dams. Then when the tide drops, the water behind the dam can be let out just like in a regular hydroelectric power plant.
  • kramerjac99 on 11 Mar 13
     
    How it works
jack wells

Wind power - sustainable power generation from wind farms across the globe - 0 views

www.bp.com/sectiongenericarticle.do

Wind sustainable

shared by jack wells on 11 Mar 13 - No Cached
  • Wind power is safe, clean and increasingly affordable – with the potential for production on a much larger scale.Government support is crucial in ensuring the expansion of wind power. We believe such support should be transitional and limited. In the US, there is continuing uncertainty over the renewal of the production tax credit, which provides incentives to invest in wind energy. We are working with other wind energy suppliers to make an effective case for wind energy generation and the renewal of the production tax credit.Wind farms can provide large volumes of electricity (sometimes at a lower cost than conventional power generation)
  • Wind power is safe, clean and increasingly affordable – with the potential for production on a much larger scale.Government support is crucial in ensuring the expansion of wind power. We believe such support should be transitional and limited. In the US, there is continuing uncertainty over the renewal of the production tax credit, which provides incentives to invest in wind energy. We are working with other wind energy suppliers to make an effective case for wind energy generation and the renewal of the production tax credit.Wind farms can provide large volumes of electricity (sometimes at a lower cost than conventional power generation) Wind energy and the environment While wind farms can be an attractive alternative energy offering, they can also stir debate. During the planning stage for each new wind farm we assess the potential social and environmental impacts.The impact on wildlife and habitat The impact of wind farms on local residentsNoise from wind turbinesShadow flicker Interference with communications signalsWe then take steps to manage any negative impacts through engineering design changes, technology and other elements.
  • Wind power is safe, clean and increasingly affordable – with the potential for production on a much larger scale.Government support is crucial in ensuring the expansion of wind power. We believe such support should be transitional and limited. In the US, there is continuing uncertainty over the renewal of the production tax credit, which provides incentives to invest in wind energy. We are working with other wind energy suppliers to make an effective case for wind energy generation and the renewal of the production tax credit.
mannixjul00

Tidal Energy | Marine Current Turbines - 0 views

www.marineturbines.com/Tidal-Energy

tidal tide

shared by mannixjul00 on 11 Mar 13 - No Cached
  • idal turbines are very much like an underwater windmill where the blades are driven by consistent, fast-moving currents.  The submerged rotors harness the power of the tidal streams to drive generators, which in turn produce electricity. Water is 832 times denser than air so consequently tidal turbine rotors can be are much smaller than wind turbine rotors generate equivalent  amounts of electricity, and they can be deployed much closer together. Devices that harness tidal stream energy present a unique set of engineering challenges in terms of design, installation and maintenance. During operation, the force of the tidal flow in Strangford Lough is equivalent to a 345 mph wind generating a 100 tonnes of thrust on the rotors. The unique SeaGen design allows capture of the maximum amount of tidal energy whilst keeping maintenance and connectivity costs low.
  • Tidal turbines are very much like an underwater windmill where the blades are driven by consistent, fast-moving currents.  The submerged rotors harness the power of the tidal streams to drive generators, which in turn produce electricity. Water is 832 times denser than air so consequently tidal turbine rotors are much smaller than wind turbine rotors generate equivalent  amounts of electricity, and they can be deployed much closer together. Devices that harness tidal stream energy present a unique set of engineering challenges in terms of design, installation and maintenance. During operation, the force of the tidal flow in Strangford Lough is equivalent to a 345 mph wind generating a 100 tonnes of thrust on the rotors.
  • kramerjac99 on 11 Mar 13
     
    How it works.
behanjos99

Geothermal Energy | Energy and Global Climate Change in New England | US EP - 0 views

www.epa.gov/...re_geothermal.html

co2 geothermal

shared by behanjos99 on 11 Mar 13 - No Cached
  • The constant temperature of the Earth creates underground sources of heat, hot water and steam which become fuel to produce geothermal energy. People have used various forms of geothermal energy for hundreds of years; modern technology accesses these underground reservoirs, steam deposits and hot air by drilling, and then using the heat or hot water directly or using it to create power. Geothermal energy represents an enormous, underused power source that provides clean, renewable energy in virtually unlimited supply.
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