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Energy Resources: Geothermal power - 0 views

www.darvill.clara.net/...geothermal.htm co2 geothermal form
shared by behanjos99 on 12 Mar 13 - No Cached
  • The big problem is that there are not many places where you can build a geothermal power station. You need hot rocks of a suitable type, at a depth where we can drill down to them. The type of rock above is also important, it must be of a type that we can easily drill through. Sometimes a geothermal site may "run out of steam", perhaps for decades. Hazardous gases and minerals may come up from underground, and can be difficult to safely dispose of.
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Geothermal Energy: Pros and Cons - 0 views

www.triplepundit.com/...geothermal-energy-pros-cons geothermal energy
shared by parkergar99 on 12 Mar 13 - No Cached
  • faglejoh98 on 12 Mar 13
     
    "The core of the Earth, some 4,000 miles beneath its surface, is a fiery morass of superheated gas and molten rock which exists at roughly 7200 degrees Fahrenheit. That temperature is maintained by the decay of radioactive particles located within the Earth's core. Technically, one could say that geothermal power is a form of nuclear power, though with far different implications from nuclear power as we know it, since these reactions occur in a containment vessel with walls thousands of miles thick. Even so, we still get things like uranium and radon gas, seeping up to the surface."
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Lock in low electricity rates with Sungevity - 0 views

www.sungevity.com/solar solar energy low electricity rates
shared by dextereli99 on 12 Mar 13 - No Cached
  • Go solar and take a stand against rising energy prices You can count on electricity costs going up every year. But there’s a way to lock in low rates and take back the power from your utility company. Go solar with Sungevity. And while everyone else’s bills go up, you can actually save money. Plus, you’ll feel good about your energy choices too.
  • dextereli99 on 12 Mar 13
     
    it saves you money
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Wave and Tidal Energy - 1 views

learning.media.mit.edu/...wave%20energy.html
shared by westkea00 on 12 Mar 13 - No Cached
  • But it has only been in recent years that it has started to become more realistic due to advance in research and technology.
  • Wave and tidal energy harvesting has been around for a few decades. But it has only been in recent years that it has started to become more realistic due to advance in research and technology. Some speculates that wave and tidal energy can supply at least 10 percent of the world's energy consumption. How much power can be harvested is determined mainly on the wave activity. A map of wave heights is shown towards the end of the document.
  • This method works much the same way as wind turbines. However, since water is four times denser than air, the tidal turbine can be much smaller to generate the same amount of energy. The ideal water current is between 2-2.5 m/s, which is usually at depths of 20-30m within 1 km from the shore. A commercial scale turbine can produce 300 kWatts but this can scale up depending on the farm's size.
  • ...2 more annotations...
  • Wave and tidal energy harvesting has been around for a few decades.
  • Wave and tidal energy harvesting has been around for a few decades
  • sopranodan99 on 23 Sep 13
     
    Wave and tidal energy harvesting has been around for a few decades. But it has only been in recent years that it has started to become more realistic due to advance in research and technology.
  • donohueale00 on 23 Sep 13
     
    Wave and tidal energy harvesting has been around for a few decades. But it has only been in recent years that it has started to become more realistic due to advance in research and technology. Some speculates that wave and tidal energy can supply at least 10 percent of the world's energy consumption. How much power can be harvested is determined mainly on the wave activity. A map of wave heights is shown towards the end of the document.
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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
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Environmental impact of wind power - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...ronmental_impact_of_wind_power cost pollution
shared by jack wells on 12 Mar 13 - No Cached
  • Compared to the environmental impact of traditional energy sources, the environmental impact of wind power is relatively minor, slightly higher than the environmental impact of hydro power on a life-cycle basis. Unlike electricity derived from fossil fuel-powered generating plants, wind power consumes no fuel and emits no air pollution in operation. As well, wind power consumes no fuel in operation, unlike nuclear power plants which do.
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Biodiesel as a Transportation Fuel - 0 views

www.consumerenergycenter.org/...biodiesel.html biodiesel form
shared by lefebvrekat99 on 12 Mar 13 - No Cached
  • Biodiesel is an alternative fuel produced from renewable resources, such as soybeans or used restaurant grease. Biodiesel contains no petroleum, but it can be blended with petroleum diesel to create a biodiesel blend. It can be used in diesel engines with no major modifications. Biodiesel is simple to use, biodegradable, nontoxic, and essentially free of sulfur and aromatics.
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How does wind generate electricity? - Curiosity - 1 views

curiosity.discovery.com/...-turbines-generate-electricity wind convert
shared by wellsann99 on 12 Mar 13 - No Cached
  • the wind turbine collects kinetic energy from the wind and transfers it to the generator. The blades on the turbine turn as the wind blows. As these blades move, they rotate a shaft connected to the rotor of a generator. The spinning magnets of the generator convert that rotational energy into electricity.
  • wellsann99 on 12 Mar 13
     
    how wind becomes electricty
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Wind Energy: Facts - 0 views

www.mass.gov/...wind-energy-facts.html wind co2
shared by cheniermab99 on 12 Mar 13 - No Cached
  • 1 MW of wind energy can offset approximately 2,600 tons Waste heat recovery  file size 4MB of carbon dioxide annually.
  • 29,440 Megawatts (MW) of wind energy are currently installed in the United States, and an additional 5,866 MW are under construction.Over 8,500 MW were installed in the US in 2008 (just beating out China with 6,300 MW). This represents: 50 percent increase from 200742 percent of all new generating capacity installed in 2008$17 billion investment44 million tons of carbon emissions avoided (equivalent of 7 million cars)35,000 new jobs
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Where does solar energy come from - 1 views

www.haqsolar.com/haqsolar15189.htm form energy solar
shared by whalenkil98 on 08 Mar 13 - No Cached
  • Solar energy originates in the depths of our sun. The sun endures a continuous stream of thermonuclear explosions as hydrogen atoms are fused into helium atoms. We encounter the resultant energy as radiation that strikes the surface of the earth.
    • kenyonlau99
      kenyonlau99 on 11 Mar 13
       
      so once the rays of the sun hit the solar panel it then is turned into energy .Fully powered by the sun.
  • hayespay99 on 08 Mar 13
     
    "Solar energy originates in the depths of our sun."
  • whalenkil98 on 11 Mar 13
     
    Where solar energy is formed and how it is formed.
  • kenyonlau99 on 11 Mar 13
     
    .Fully powered by the sun.
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Fuel Cells | Energy Sources | Chevron - 0 views

www.chevron.com/...fuelcells form fuel cell
shared by conboyeri98 on 11 Mar 13 - No Cached
  • Fuel cells are self-contained power generation devices that are able to produce reliable electricity for residential, commercial, industrial and transportation applications. A fuel cell can convert hydrogen directly into electricity that can be used to power an electric car, for example, or a home.
  • In fuel cells, the use of hydrogen produces fewer greenhouse gases than does burning fossil fuels
  • . Fuel cells convert energy efficiently, which helps conserve energy resources. And a byproduct of this electro-chemical process is pure water—a clear benefit for the environment
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  • However, hydrogen—a tasteless, odorless, colorless gas—is not found freely in nature. It must be extracted from other substances.
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Biofuels - climate hit or climate hype? - Climate Action Programme - 0 views

www.climateactionprogramme.org/...ls_climate_hit_or_climate_hype biofuel history
shared by greenhan99 on 11 Mar 13 - No Cached
  • Biofuels are renewable liquid or gaseous transport fuels derived from biomass (bacterial, plant or animal material).
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STELR :: wind ENERGY - 1 views

stelr.org.au/wind-energy wind convert
shared by wellsann99 on 11 Mar 13 - No Cached
  • 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.
  • wellsann99 on 11 Mar 13
     
    steps to converting win power to electricty
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Tidal Power - 1 views

www.global-greenhouse-warming.com/tidal.html tide form sustainable
shared by murphymat98 on 11 Mar 13 - No Cached
  • Tidal power is a means of electricity generation achieved by capturing the energy contained in moving water mass due to tides. Two types of energy can be extracted: kinetic energy of currents between ebbing and surging, and potential energy from the difference in height (or head) between high and low water marks.
  • Tidal power schemes do not produce energy 24 hours a day. A conventional design, in any mode of operation, would produce power for 6 to 12 hours in every 24 and will not produce power at other times
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World's fist commercial scale tidal energy generator nears completion - 0 views

www.gizmag.com/...9110 tide scale
shared by mchughkon99 on 11 Mar 13 - No Cached
  • April 4, 2008 Bristol based renewable energy company Marine Current Turbines has completed the first installation phase of the 1.2MW SeaGen Tidal System at Northern Ireland’s Strangford Lough - a site chosen for its combination of fast tidal current and ability to provide shelter from bad weather which may hinder the construction process.
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Biofuel Facts - 0 views

environment.nationalgeographic.com/...biofuel-profile sustainable biofuel
shared by schmettererdav00 on 11 Mar 13 - No Cached
  • Much of the gasoline in the United States is blended with a biofuel—ethanol. This is the same stuff as in alcoholic drinks, except that it's made from corn that has been heavily processed. There are various ways of making biofuels, but they generally use chemical reactions, fermentation, and heat to break down the starches, sugars, and other molecules in plants. The leftover products are then refined to produce a fuel that cars can use.
  • schmettererdav00 on 20 Sep 13
     
    On the face of it, biofuels look like a great solution. Cars are a major source of atmospheric carbon dioxide, the main greenhouse gas that causes global warming. But since plants absorb carbon dioxide as they grow, crops grown for biofuels should suck up about as much carbon dioxide as comes out of the tailpipes of cars that burn these fuels. And unlike underground oil reserves, biofuels are a renewable resource since we can always grow more crops to turn into fuel.
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Wind Power - What is Wind Power and How Does It Work? - 0 views

environment.about.com/...wind_power.htm wind form
shared by wellsann99 on 11 Mar 13 - Cached
  • wind power as a better way to generate electricity than plants fueled by coal, hydro (water) or nuclear power.
  • willisjos98 on 11 Mar 13
     
    "Wind power is actually a form of solar power, because wind is caused by heat from the sun. Solar radiation heats every part of the Earth's surface, but not evenly or at the same speed. Different surfaces-sand, water, stone and various types of soil-absorb, retain, reflect and release heat at different rates, and the Earth generally gets warmer during daylight hours and cooler at night. As a result, the air above the Earth's surface also warms and cools at different rates. Hot air rises, reducing the atmospheric pressure near the Earth's surface, which draws in cooler air to replace it. That movement of air is what we call wind."
  • wellsann99 on 11 Mar 13
     
    what is wind power
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Geothermal energy - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Geothermal_energy Geothermal cost
shared by mcgarrdan98 on 11 Mar 13 - Cached
  • Drilling and exploration for deep resources is very expensive. Forecasts for the future of geothermal power depend on assumptions about technology, energy prices, subsidies, and interest rates. Pilot programs like EWEB's customer opt in Green Power Program [6] show that customers would be willing to pay a little more for a renewable energy source like geothermal. But as a result of government assisted research and industry experience, the cost of generating geothermal power has decreased by 25% over the past two decades.[7] In 2001, geothermal energy cost between two and ten cents per kwh.[8]
  • faglejoh98 on 11 Mar 13
     
    "Hot springs have been used for bathing at least since paleolithic times[9] The oldest known spa is a stone pool on China's Lisan mountain built in the Qin dynasty in the 3rd century BC, at the same site where the Huaqing Chi palace was later built. In the first century AD, Romans conquered Aquae Sulis, now Bath, Somerset, England, and used the hot springs there to feed public baths and underfloor heating. The admission fees for these baths probably represent the first commercial use of geothermal power. The world's oldest geothermal district heating system in Chaudes-Aigues, France, has been operating since the 14th century.[10] The earliest industrial exploitation began in 1827 with the use of geyser steam to extract boric acid from volcanic mud in Larderello, Italy."
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Tidal Power - Generating electricity from tidal currents - 1 views

www.alternative-energy-news.info/...tidal-power tide energy
shared by rascoekat00 on 11 Mar 13 - No Cached
  • Tidal energy is produced through the use of tidal energy generators. These large underwater turbines are placed in areas with high tidal movements, and are designed to capture the kinetic motion of the ebbing and surging of ocean tides in order to produce electricity. Tidal power has great potential for future power and electricity generation because of the massive size of the oceans. These articles explore the potential energy of tidal power technologies.
  • We can use slow moving ocean and river waves for a new, reliable and affordable alternative energy source. A University of Michigan engineer has developed a device that acts like a fish that turns the potentially destructive vibrations in water into clean, renewable energy.
  • It will generate one of the most environmentally-friendly forms of energy - it makes no noise
  • ...2 more annotations...
  • "But if we could harness 0.1 percent of the energy in the ocean, we could support the energy needs of 15 billion people
  • Tidal energy is produced through the use of tidal energy generators. These large underwater turbines are placed in areas with high tidal movements
  • Xin Wang on 11 Mar 13
     
    This is how tidal energy is converted into useful form of power. 
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