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dpurdy

Solar Energy and Energy Independence - 1 views

www.americanenergyindependence.com/solarenergy.aspx

solar potential

shared by dpurdy on 03 Nov 11 - No Cached
  • Science tells us that every square meter of the earth's surface, when exposed to direct sunlight, receives about 1000 watts (1 kilowatt) of energy from the sun's light.
  • anonymous on 05 Oct 13
     
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dpurdy

Solar Energy Facts - 0 views

www.alternative-energy-resources.net/solarenergyfacts.html

solar how

shared by dpurdy on 03 Nov 11 - No Cached
  • Solar Cells or photovoltaic cells convert sunlight directly into electricity. When energy from the sun comes in contact with the cell, electrons in the two different semiconductors absorb the energy and use it to move around, creating an electrical current.
dpurdy

Fuel Cells - Electrochemical Power - 1 views

www.fuelcell.no/applications_mobile_eng.htm

fuel cells history cost

shared by dpurdy on 03 Nov 11 - No Cached
  • One of the first applications for fuel cells based on their advantageous properties was in the US space program.
  • Compared to IC engines, fuel cells have practically no polluting exhaust like NOx and sulphides.
  • It is generally acknowledged that the feasibility and durability of fuel cells in automobiles has been proven. The major focus now is on cost reduction
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dpurdy

Fuel Cells - Electrochemical Power - 0 views

www.fuelcell.no/principle_history_eng.htm

history

shared by dpurdy on 03 Nov 11 - No Cached
  • The best known early fuel cell experiments were performed in 1842 by the British physicist and lawyer, Sir William R. Grove (1811-1896)
  • Due to easily accessible and large amounts of oil and the invention of the combustion engine (Carl Friedrich Benz and Gottlieb Daimler), fuel cells were forgotten until the middle of the 20th century. In the US Apollo space programme, fuel cells exhibited their first renaissance in the 1960’s. 
  • Fuel cell development has been slowed down by a fear of hydrogen as a fuel. It is commonly believed that hydrogen is an extremely explosive and dangerous gas. Most of this belief was founded in 1937, when the hydrogen-filled zeppelin “Hindenburg” caught fire and crashed in Lakehurst, USA.
  • anonymous on 02 Oct 13
     
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dpurdy

HowStuffWorks "How Fuel Cells Work" - 0 views

auto.howstuffworks.com/...fuel-cell5.htm

Hydrogen cost infrastructure

shared by dpurdy on 03 Nov 11 - Cached
  • CostChief among the problems associated with fuel cells is how expensive they are. Many of the component pieces of a fuel cell are costly.
  • InfrastructureIn order for PEMFC vehicles to become a viable alternative for consumers, there must be a hydrogen generation and delivery infrastructure. This infrastructure might include pipelines, truck transport, fueling stations and hydrogen generation plants
  • anonymous on 28 Sep 13
     
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dpurdy

Wind Program: Wind Energy Resource Potential - 1 views

www1.eere.energy.gov/...wind_potential.html

Wind potential

shared by dpurdy on 03 Nov 11 - No Cached
  • The United States has enough wind resources to generate electricity for every home and business in the nation. But not all areas are suitable for wind energy development.
  • anonymous on 02 Oct 13
     
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dpurdy

NREL: Learning - Geothermal Electricity Production - 0 views

www.nrel.gov/...re_geo_elec_production.html

geothermal how

shared by dpurdy on 03 Nov 11 - Cached
  • Geothermal Electricity Production This geothermal power plant generates electricity for the Imperial Valley in California. Geothermal power plants use steam produced from reservoirs of hot water found a few miles or more below the Earth's surface to produce electricity. The steam rotates a turbine that activates a generator, which produces electricity.
dpurdy

Renewable energy - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Renewable_energy

sustainable

shared by dpurdy on 03 Nov 11 - No Cached
  • Ocean energy Systems to harvest utility-scale electrical power from ocean waves have recently been gaining momentum as a viable technology. The potential for this technology is considered promising, especially on west-facing coasts with latitudes between 40 and 60 degrees:[74]
dpurdy

Photovoltaics - Lighting the World - 1 views

solardev.com/SEIA-lightworld.php

solar location potential current

shared by dpurdy on 03 Nov 11 - No Cached
  • 200,000 homes in the U.S. use some type of photovoltaic solar technology-and the market is expanding at a healthy 15% annually.
  • PV modules covering 0.3% of the land in the U.S., equivalent to one fourth of the area currently occupied by railroads, could provide all of the US's electricity needs.
  • anonymous on 02 Oct 13
     
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coonari98

Geothermal electricity - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Geothermal_electricity

potential

shared by coonari98 on 07 Nov 11 - No Cached
  • Estimates of the electricity generating potential of geothermal energy vary from 35 to 2,000 GW.[2] Current worldwide installed capacity is 10,715 megawatts (MW), with the largest capacity in the United States (3,086 MW),[3] Philippines, and Indonesia.
  • coonari98 on 22 Oct 12
     
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rascoekat00

Hydropower: Generate Energy with Rivers and Ocean Tides - For Dummies - 0 views

www.dummies.com/...y-with-rivers-and-ocean-t.html

tide energy electricity

shared by rascoekat00 on 20 Sep 13 - No Cached
  • When water flows toward the shore with the incoming tide, it flows through a tidal energy system, turning a turbine that generates electricity. When the tide shifts and flows in the opposite direction, away from shore, the tidal energy system again captures the energy with a turbine and converts it into electricity.
  • An important source of alternative energy is hydropower: converting the flow of rivers and ocean waves and tides into electricity through dams and turbines. The best part about both of these water sources is that they’re 100 percent renewable.
  • The main advantage of using ocean tides for energy is that tides and waves are a constant, unchanging, clean source of energy. The main disadvantage is that tidal energy systems may impact the environment by changing the flow of water into shoreline and estuarine ecosystems.
kirkpatrickcon99

Articles about Wind Turbines - Chicago Tribune - 0 views

articles.chicagotribune.com/...wind-turbines

wind current

shared by kirkpatrickcon99 on 20 Sep 13 - No Cached
  • The world will have enough wind turbines to generate more than 300 gigawatts of power - the equivalent of 114 nuclear power plants
gonzalezisa00

Science of Summer: How Do Ocean Waves Form? | LiveScience - 0 views

www.livescience.com/1-how-do-ocean-waves-form.html

wave form

shared by gonzalezisa00 on 20 Sep 13 - No Cached
  • Presnell explained that wind speed and duration help in determining the size and frequency of ocean waves. Another factor is called "fetch," referring to the span of water over which a breeze blows, and the longer a fetch, the more energy a wave can build up.
sopranodan99

What Causes Ocean Waves? - EnchantedLearning.com - 0 views

www.enchantedlearning.com/...Waves.shtml

wave form

shared by sopranodan99 on 20 Sep 13 - Cached
  • The winds cause waves on the surface of the ocean (and on lakes). The wind transfers some of its energy to the water, through friction between the air molecules and the water molecules. Stronger winds (like storm surges) cause larger waves.
wooddan99

Geothermal Could be Cheaper than Fossil Fuels with $3 Billion DOE Investment Says NYU S... - 0 views

cleantechnica.com/...-doe-investment-says-nyu-study

geothermal cost

shared by wooddan99 on 26 Sep 13 - No Cached
  • Geothermal could be cheaper than fossil fuels, according to a study just published at NYU Stern. Yet, strangely, geothermal received the fewest Federal DOE dollars invested in R&D over the last 8 years
schmettererdav00

http://www.howstuffworks.com/fuel-efficiency/biofuels/10-advantages-of-biofuels.htm - 0 views

www.howstuffworks.com/...10-advantages-of-biofuels.htm

cost biofuel

shared by schmettererdav00 on 27 Sep 13 - No Cached
  • As gas prices rise and global warming becomes more pervasive, more people are using biofuels as a way to save money and decrease their consumption of fossil fuels.
nassiveradom00

HowStuffWorks "How Geothermal Energy Works" - 0 views

science.howstuffworks.com/...geothermal-energy.htm

shared by nassiveradom00 on 23 Sep 13 - No Cached
  • t's called geothermal energy -- from the Greek words geo, or "earth," and therme, meaning "heat."
  • The core, about 4,000 miles (6,437 kilometers) beneath the surface, can reach temperatures of 7,600 degrees Fahrenheit
  • (4,204 degrees Celsius).
  • ...2 more annotations...
  • Part of that heat is left over from the Earth's formation, about 4 billion years ago. The rest comes from the constant decay of radioactive isotopes inside the Earth.
  • ometimes that water escapes through cracks in the Earth to form pools of hot water (hot springs) or bursts of hot water and steam (geysers). The rest of the heated water remains in pools under the Earth's surface, called geothermal reservoirs.
rutalil00

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

www.ask.com/...ere-does-wind-energy-come-from

wind form

shared by rutalil00 on 23 Sep 13 - No Cached
  • The terms 'wind energy' describe the procedure by which wind is employed to produce mechanical power or electricity.
sokolkyl00

Myths And Facts About Solar Energy | Research | Media Matters for America - 0 views

mediamatters.org/...192364

solar co2

shared by sokolkyl00 on 23 Sep 13 - No Cached
  • solar energy exhibits the "fastest growth," providing "more than 10% of global electricity by 2050." The IEA further found that in high renewable scenarios, solar is essential due to its "almost unlimited potential":
  • At the American Enterprise Institute's blog, Kenneth Green promoted a press release claiming that "Solar cells do not offset greenhouse gases" because solar cell production emits gases that "make carbon dioxide (CO2) seem harmless."
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