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deepat00

Where Does Geothermal Energy Come From - 0 views

www.universetoday.com/...es-geothermal-energy-come-from

geothermal co2 fossil fuels

shared by deepat00 on 11 Mar 13 - No Cached
  • bounadaries and faults are cracks in the Earth’s crust where magma rises near or to the surface. Geothermal plants take advantage of this fact using water heated by this volcanic activity to produce electric power.
  • The best part is that it is clean energy. There is no way it can produce pollution that can harm the environment
  • hardingmar00 on 23 Sep 13
     
    where geothermal energy comes from
mcgarrdan98

Geothermal Energy: Construction Impacts - 0 views

teeic.anl.gov/...index.cfm

geothermal pollution

shared by mcgarrdan98 on 12 Mar 13 - No Cached
  • Emissions generated during the construction phase include exhaust from vehicular traffic and construction equipment, fugitive dust from traffic on paved and unpaved roads, and the release of geothermal fluid vapors (especially hydrogen sulfide, carbon dioxide, mercury, arsenic, and boron, if present in the reservoir). Activities such as site clearing and grading, power plant and pipeline system construction, and transmission line construction would have more intense exhaust-related emissions over a period of 2 to 10 years. Impacts would depend upon the amount, duration, location, and characteristics of the emissions and the meteorological conditions (e.g., wind speed and direction, precipitation, and relative humidity).
  • Most impacts to ecological resources (vegetation, wildlife, aquatic biota, special status species, and their habitats) would be low to moderate and localized during the construction phase (although impacts due to noise could be high). Activities such as site clearing and grading, road construction, power plant construction, ancillary facility construction, and vehicle traffic have the potential to affect ecological resources by disturbing habitat, increasing erosion and runoff, and creating noise at the project site. Impacts to vegetation include loss of native species and species diversity; increased risk of invasive species; increased risk of topsoil erosion and seed bank depletion; increased risk of fire; and alteration of water and seed dispersal.
  • Solid and industrial waste would be generated during construction activities. Much of the solid waste would be nonhazardous, consisting of containers and packaging materials, miscellaneous wastes from equipment assembly and presence of construction crews (food wrappers and scraps), and woody vegetation. industrial wastes would include minor amounts of paints, coatings, and spent solvents. Most of these materials would likely be transported off-site for disposal.
mchughkon99

Tidal Power - 0 views

www.surviveclimatechange.com/tidal-power.html

tide cost current

shared by mchughkon99 on 12 Mar 13 - No Cached
  • Although this source of energy shows some promise in terms of "clean", renewable energy there have been some roadblocks to widespread use of energy from the tides. This type of energy should not be put on the back burner even though there appears to be limited opportunities at this time
  • mchughkon99 on 12 Mar 13
     
    can be cost effective
sconzomic99

Tidal energy extraction: renewabl... preview & related info | Mendeley - 0 views

www.mendeley.com/...ewable-sustainable-predictable

cost tide sustainable

shared by sconzomic99 on 12 Mar 13 - No Cached
  • The tidal flow of sea water induced by planetary motion is a potential source of energy if suitable systems can be designed and operated in a cost-effective manner
parkergar99

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."
stockmanchl99

Information about Biofuel, what is Biofuel, renewable energy solutions, Ethanol uses - 0 views

www.biofuelwatch.org

biofuel

shared by stockmanchl99 on 12 Mar 13 - No Cached
  • Basically biofuel is produced by using ethanol from naturally grown plant matter which allows for a more sustainable and environmentally friendly earth.
  • Bio fuel is a natural alternative from other fossil fuels and is attained from living or biological material that has just died. Basically biofuel is produced by using ethanol from naturally grown plant matter which allows for a more sustainable and environmentally friendly earth. To assist in the manufacturing of biofuel, the plants and plant-derived materials that contribute to its formation includes corn, corn cob, sugar cane, soybeans, flaxseed, rapeseed, vegetable oils, waste cooking oils, animal fats, tall oil and even cow manure. However, at present the most widely used source of bioeenergy is of course wood.
Connor Wiggins

fuel cell Facts, information, pictures | Encyclopedia.com articles about fuel cell - 0 views

www.encyclopedia.com/...fuel_cell.aspx

fuel cell

shared by Connor Wiggins on 12 Mar 13 - No Cached
  • Fuel cells convert chemical energy to electrical energy by combining hydrogen from fuel with oxygen from the air. Hydrogen fuel can be supplied in two ways—either directly as pure hydrogen gas or through a "fuel reformer" that converts hydrocarbon fuels such as methanol, natural gas, or gasoline into hydrogen-rich gas. A fuel cell's only emission is water.
  • Connor Wiggins on 12 Mar 13
     
    What fuel cell is and how its made 
crandallmad00

How Tidal Power is Riding the Crest of a Wave - 1 views

www.renewableenergyworld.com/...-is-riding-the-crest-of-a-wave

tide wave

shared by crandallmad00 on 12 Mar 13 - No Cached
  • The argument for tidal power is overwhelming: it’s a practically infinite supply of clean energy and has one of the smallest carbon footprints of any power source; it’s reliable, cost-efficient, has minimal effect on the marine environment and virtually zero effect on sea-gazing aesthetics. Most importantly, The World Energy Council estimates that the energy that can be harvested from world’s oceans is equal to twice the electricity that the world produces now
  • A reason many energy experts are looking at what tidal may be able to contribute, compared to other renewable sources like wind power, is that the amount of energy generated from a power-generating turbine is proportional to the density of the fluid that flows back and forth – meaning a water turbine has several hundred times the power of an air turbine.
  • Seawater is denser than air; a lot denser – 832 times to be exact, meaning an 8 knot tidal current has more energy than a 380kph wind. This means a wave farm of ‘sea snakes’ – devices built by Scotland’s Pelamis Wave Power – covering half a square mile of ocean could produce 30 MWh of power, which is estimated to be enough for 20,000 homes. A wave farm covering 472 square miles could supply 24 million households – enough for the entire UK.
  • ...1 more annotation...
  • Partly this has been due to the uncertainty of how to harness all this abundant marine energy. While it’s great that there’s the potential to harness up to 153 GW of tidal power in the UK alone,
lefebvrekat99

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.
cheniermab99

Wind Turbines for Electricity - 1 views

zfacts.com/244

wind co2 cost

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¢
  • ...1 more annotation...
  • as coal is the worst source of CO2. Thirty years from now, wind power might be cutting global GHG emissions by 10%.
cottonetar98

GENERATION TO THE NATION - 0 views

www.ehow.com/es_4740597_wind-farm-work.html

wind form ehow

shared by cottonetar98 on 08 Mar 13 - No Cached
cottonetar98 liked it
  • Wind is created when the sun hits the earth. The air above water and the air above the ground heat at different rates. Since the air above the ground heats faster, the warm air from the ground hits the atmosphere first. It then is pushed out toward the sea. As the air heads toward the sea, it gets colder and sinks back down to the sea level. This creates a current pushing the sea air toward the land in the form of wind. The stronger the sun's energy on the land and water, the faster the wind will circulate.
  • As the gearbox turns, it feeds the RPM into the generator, which transfers the energy into usable electrical energy and stores it. Large cables are attached to the generator that feed the electrical currents from the generators of all the wind turbines on the farm into one electrical storage area. The energy can then be transported through power lines around the area for commercial and home usage.
  • cottonetar98 on 08 Mar 13
     
    What makes wind. 
whalenkil98

How much of the world's energy does the United States use? - FAQ - U.S. Energy Information AdmInistration (EIA) - 0 views

www.eia.gov/...faq.cfm

united states current

shared by whalenkil98 on 15 Mar 13 - No Cached
  • How much of the world's energy does the United States use? In 2009, world total primary energy consumption was 483 Quadrillion Btu. The United States' primary energy consumption was about 95 Quadrillion Btu, about 20% of the world total. Learn More: International Energy Statistics: Total Primary Energy Consumption Last updated: July 9, 2012
kramerjac99

The Physics of Tidal Energy - NYTimes.com - 0 views

green.blogs.nytimes.com/...the-physics-of-tidal-energy

tidal energy

shared by kramerjac99 on 11 Mar 13 - No Cached
  • a tidal energy project is moving ahead in Maine, with high costs but high hopes too. But the 180-kilowatt unit that the Ocean Renewable Power Company hopes to put under water next week is really just a first step. The big question is, how well will it withstand the force of the rushing water?
  • The region, the Bay of Fundy, is famous for strong tides, but the company has picked a spot called Cobscook Bay, where the current is relatively slow, an average of 5.8 knots, or 6.7 miles an hour. That is the speed at which the hardware will produce 180 kilowatts.
  • kramerjac99 on 11 Mar 13
     
    How it works, how fast the waves are
wellsann99

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
fieldingbry99

Ch 12 Page 73: Sustainable Energy - without the hot air | David MacKay - 0 views

www.withouthotair.com/...page_73.shtml

sustainable wave

shared by fieldingbry99 on 11 Mar 13 - No Cached
  • In open water, waves are generated whenever the wInd speed is greater than about 0.5 m/s.
  • First, let’s clarify where waves come from: sun makes wind and wind makes waves.
  • fieldingbry99 on 11 Mar 13
     
    "First, let's clarify where waves come from: sun makes wind and wind makes waves."
kramerjac99

Tidal Energy Ltd » The Technology - 0 views

www.tidalenergyltd.com/?page_id=640

tidal energy

shared by kramerjac99 on 11 Mar 13 - No Cached
  • Tidal energy is a form of hydropower that converts the energy of the tides into electricity or other useful forms of power. The tide is created by the gravitational effect of the sun and the moon on the earth. Tidal energy is therefore a predictable form of renewable energy, which can be harnessed in two forms:
  • kramerjac99 on 11 Mar 13
     
    what it is.
wellsann99

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
vanierfel98

How Green is Geothermal Energy?: Clean Energy, Renewable Energy, Sustainable Energy: GreatGreenIdea.com - 1 views

www.greatgreenidea.com/reen-is-Geothermal-Energy.html

geothermal sustainable

shared by vanierfel98 on 11 Mar 13 - No Cached
  • It is an energy source that is considered renewable because both rain and heat in the earth replenish themselves naturally.
  • vanierfel98 on 11 Mar 13
     
    Geothermal energy is renewable
dextereli99

What is the sustainability of solar energy? - Yahoo! Answers - 2 views

answers.yahoo.com/...index

solar energy yahoo answers sustainable

shared by dextereli99 on 11 Mar 13 - No Cached
  • The will burn for billions of years, it won't run out any time soon. This is sustainable because it will not deplete in the near future. The harder question is if the materials that go into a solar cell are sustainable. They use primarily silicon, which is one of the most abundant materials on earth. But they can also use other things, like metals (copper, silver, gold), and some toxic chemicals (arsenic, cadmium) etc. The sustainability of these materials is questionable. These materials are recyclable, and it is thought 99% of a solar cell can be recycled. But the production of them does has some toxic site affects, which means we have to balance the 'clean' energy production of the cells with the bad by products of their manufacturing process.
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