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conwayjam99

HowStuffWorks "Wind" - 0 views

science.howstuffworks.com/...wind-info1.htm

wind sustainable

shared by conwayjam99 on 15 Mar 13 - No Cached
  • conwayjam99 on 15 Mar 13
     
    "Wind is caused by differences in atmospheric pressure created, in large part, by the unequal heating of the earth's surface by the sun."
dpurdy

How do fossil fuels cause pollution - 1 views

wiki.answers.com/...o_fossil_fuels_cause_pollution

fossil fuels pollution

shared by dpurdy on 15 Mar 13 - No Cached
  • brownale99 on 15 Mar 13
     
    "Fossil fuels, even when burned perfectly (natural gas, or methane, burns the best) release carbon dioxide which is a greenhouse gas causing dangerous global warming. Most fossil fuels also release smoke (leading to smog), and they may also release sulfur oxides and nitrogen oxides which contribute to acid rain."
  • dpurdy on 19 Mar 13
     
    "Fossil fuels, even when burned perfectly (natural gas, or methane, burns the best) release carbon dioxide which is a greenhouse gas causing dangerous global warming. Most fossil fuels also release smoke (leading to smog), and they may also release sulfur oxides and nitrogen oxides which contribute to acid rain."
dpurdy

Transesterification - Definition, Glossary, Details - Oilgae - 0 views

www.oilgae.com/...transesterification.html

biofuel convert

shared by dpurdy on 19 Mar 13 - No Cached
  • The main reaction for converting oil to biodiesel is called transesterification.
  • The transesterification process reacts an alcohol (like methanol) with the triglyceride oils contained in vegetable oils, animal fats, or recycled greases, forming fatty acid alkyl esters (biodiesel)
dpurdy

What Is Biodiesel - 0 views

www.esru.strath.ac.uk/...what_biodiesel.htm

biofuel convert

shared by dpurdy on 19 Mar 13 - Cached
  • The Transesterification process is the reaction of a triglyceride (fat/oil) with an alcohol to form esters and glycerol
coreyemi99

How Do PV Solar Panels Work - Solar - 0 views

www.reuk.co.uk/ow-Do-PV-Solar-Panels-Work.htm

convert

shared by coreyemi99 on 20 Mar 13 - No Cached
  • When a visible light photon strikes a solar cell it can do one of three things: pass straight through, be reflected, or be absorbed. If the photon is absorbed, its energy is absorbed by an electron in an atom of the solar cell enabling it to escape from its normal position (photon excitation), cross the junction and fill a hole. Since electrons are physically moving across the PN junction, the positive charge carrying holes are effectively moving in the opposite direction around the load circuit (a rechargeable battery or light bulb etc). This completes the circuit providing more holes for the electrons to combine with and providing usable electricity.
dpurdy

Biodiesel Performance, Costs, and Use - 0 views

www.eia.gov/...biodiesel

biofuel cost

shared by dpurdy on 19 Mar 13 - No Cached
  • Unless soybean oil prices decline dramatically, it does not appear that biodiesel can be produced in large quantities at a cost that is competitive with petroleum diesel
dpurdy

The Biofuels FAQs: The Facts About Biofuels: Biodiesel - 0 views

www.energyfuturecoalition.org/...fact_biodiesel.htm

biofuel cost

shared by dpurdy on 19 Mar 13 - No Cached
  • Biodiesel from soybeans costs an estimated $2 to $2.50 per gallon to produce. Biodiesel from yellow grease is about $1 a gallon cheaper, but the available supply in the U.S. is much smaller – enough to make 100 million gallons per year. Producers of biodiesel from pure vegetable oil are eligible for a federal excise tax credit of $1 for every gallon blended with conventional diesel. Biodiesel from used cooking oil earns a credit of 50 cents per gallon.
  • Another promising technology captures smokestack emissions of carbon dioxide for use in an “algae farm,” where the gas stimulates the rapid growth of algae that can be converted into biodiesel and ethanol.
dpurdy

HowStuffWorks "Mechanics of Hand-powered Generators" - 1 views

electronics.howstuffworks.com/...hand-powered-generators1.htm

fossil fuels convert

shared by dpurdy on 19 Mar 13 - No Cached
  • A generator is basically an electric motor working in reverse.
  • By spinning a coil of wire around a magnet, he found that he could create a steady current. Thus, he could convert energy used to spin the coil into electrical energy.
  • This principle powers generators that run on gasoline or diesel fuel, as well as the massive turbines in modern power plants, where the coils are turned by falling water or steam generated by burning coal or igniting nuclear reactions.
  • dpurdy on 19 Mar 13
     
    How a generator works
dpurdy

Discovery Kids :: Tell Me - How does a generator work? - 0 views

kids.discovery.com/...how-does-a-generator-work

fossil fuels convert fossil

shared by dpurdy on 19 Mar 13 - No Cached
  • . It does this by using a magnet that forces electrons to move along a wire at a steady rate while putting pressure on them.
rascoekat00

Where is tidal power being used to generate electricity - 0 views

wiki.answers.com/...g_used_to_generate_electricity

tide power convert electricity

shared by rascoekat00 on 19 Mar 13 - No Cached
  • Barrage systems. This system, built like a dam across a river, holds back the water till the tide has gone out, then uses the potential energy of the water to turn turbines in the barrage. This is an expensive system with many disadvantages.
  • Tidal Stream systems. This consists of using turbines, rather like wind turbines, to use the kinetic power of the moving water to generate electricity. This is easier and cheaper to install.
  • There are three Barrage systems operating throughout the world. One large 240 MW plant on the Rance River in France, and two small plants, one in the Bay of Fundy in Canada, and another in Kislaya Guba in Russia.
dpurdy

First Tidal Power in U.S. Starts Flowing to the Grid - IEEE Spectrum - 0 views

spectrum.ieee.org/...wer-starts-flowing-to-the-grid

tide current

shared by dpurdy on 19 Mar 13 - No Cached
  • An offshore turbine is finally spinning in the United States!
  • Bay of Fundy, off the Maine coast. The TidGen has a peak power output of 180 kilowatts, enough to power around 25 to 30 homes
  • dpurdy on 19 Mar 13
     
    The ONLY tidal power plant connected to the grid in the US is online.
dpurdy

What makes geothermal energy clean? - Curiosity - 0 views

curiosity.discovery.com/...-makes-geothermal-energy-clean

geothermal form sustainable

shared by dpurdy on 19 Mar 13 - No Cached
  • The water that creates the energy ultimately returns to the Earth, where it can be used again.
sconzomic99

Global Fossil-Fuel CO2 Emissions - 1 views

cdiac.ornl.gov/...tre_glob.html

co2

shared by sconzomic99 on 15 Mar 13 - No Cached
  • Since 1751 approximately 337 billion tons of carbon have been released to the atmosphere from the consumption of fossil fuels and cement production
  • Half of these emissions have occurred since the mid 1970s
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."
lefebvrekat99

Where does biofuel come from - 0 views

wiki.answers.com/...Where_does_biofuel_come_from

biofuel form

shared by lefebvrekat99 on 14 Mar 13 - No Cached
  • Biofuel comes from petroleum products which come from below the ground. Ethanol, however, the "bio" part of biofuels, comes from corn.
conwayjam99

What are the advantages and disadvantages of wind power - 0 views

wiki.answers.com/...nd_disadvantages_of_wind_power

wind

shared by conwayjam99 on 13 Mar 13 - No Cached
  • conwayjam99 on 13 Mar 13
     
    "Wind power will become cheaper than fossil fuel in the next few years (when the price of carbon is added to coal and oil), and in many places already is."
stewartlas97

Wind - 0 views

www.esru.strath.ac.uk/...wind.htm

shared by stewartlas97 on 13 Mar 13 - No Cached
  • stewartlas97 on 13 Mar 13
     
    "This movement is complicated by several other factors that means wind does not always flow from the equator in the direction of either pole. The rotation of the earth creates a force known as the Coriolis force and this factor along with the temperature differences create winds at high altitudes above the earth on a large scale. These Geostrophic winds play a part in the wind's that affect us in everyday life, but local winds are largely affected by the surface of the earth - which is neither uniform or smooth. The earth has large flat plains (desert regions), areas covered with plant life (rainforests), very uneven regions (mountain ranges) and very smooth regions (seas and oceans), all of which affect the wind near the surface of the earth to varying degrees. These areas of the earth all have different values of roughness, which can impeded the flow of air. Obviously the lower the value of roughness the less the air is impeded."
bonnjos98

My Library - 0 views

www.diigo.com/bonnjos98

geothermal

shared by bonnjos98 on 13 Mar 13 - No Cached
  • bonnjos98 on 13 Mar 13
     
    ""It may surprise you to know that the ancient Romans had central heating. They used geothermal energy - in the form of hot springs - to heat their homes. Geothermal heating wasn't used in an organized fashion since until the late 19th century when Boise, Idaho, piped in water from local hot springs to warm buildings. Now, geothermal energy is used globally. Reykjavik, Iceland, leads the world in use of geothermal energy, heating 95 percent of its buildings with heat from below the Earth's surface." more from curiosity.discovery.com - Not Cached - Edit - Delete - Share▼ - Preview"
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