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big_jerome

How do wind turbines transform the energy found in the wind - 1 views

wiki.answers.com/...m_the_energy_found_in_the_wind

wind energy

shared by big_jerome on 19 Mar 12 - No Cached
  • A wind turbine is a rotating machine which converts the kinetic energy in wind into mechanical energy. If the mechanical energy is used directly by machinery, such as a pump or grinding stones, the machine is usually called a windmill.
  • wind t
dpurdy

The Fuel Cell: Is it Ready? - 0 views

www.buchmann.ca/Article1-Page1.asp

hydrogen future potential cost

shared by dpurdy on 19 Mar 12 - No Cached
  • The fuel cell is being considered as an eventual replacement for the internal combustion engine for cars, trucks and buses. Major car manufacturers have teamed up with fuel cell research centers or are doing their own development. There are plans for mass-producing cars running on fuel cells. Because of the low operating cost of the combustion engine, and some unresolved technical challenges of the fuel cell, however, experts predict that a large scale implementation of the fuel cell to power cars will not occur before 2015, or even 2020.
  • Most fuel cells are still handmade and are used for experimental purposes. Fuel cell promoters remind the public that the cost will come down once the cells are mass-produced and lower cost material are found. While an internal combustion engine requires an investment of $35 to $50 to produce one kilowatt (kW) of power, the equivalent cost in a fuel cells is still a whopping $3,000 to $7,500. The goal is a fuel cell that would cost equal or less than diesel engines.
dpurdy

How Fuel Cells Work - 0 views

www.fueleconomy.gov/...fcv_PEM.shtml

hydrogen how

shared by dpurdy on 19 Mar 12 - Cached
  • Most fuel cells designed for use in vehicles produce less than 1.16 volts of electricity—far from enough to power a vehicle. Therefore, multiple cells must be assembled into a fuel cell stack.
  • dpurdy on 19 Mar 12
     
    great pic on how fuel cells look. 
geczyluk99

Fuel Cell Vehicles: Challenges - 1 views

www.fueleconomy.gov/...fcv_challenges.shtml

hydrogen cost fuel cell

shared by geczyluk99 on 19 Mar 12 - Cached
  • Fuel cell system costs have decreased significantly over the past several years but are still nearly twice as high as those for internal combustion engines. Likewise, onboard hydrogen storage costs are currently $15–$18/kWh for high-pressure gaseous storage, while the commercialization target is $2/kWh. There is potential to reduce this cost using lower-cost carbon fiber tanks or materials-based storage technologies, such as metal hydrides.
    • dpurdy
      dpurdy on 19 Mar 12
       
      as noted in the graph. the cost has been coming down. If it keeps on dropping it will be a good system in the future.
    • dpurdy
      dpurdy on 19 Mar 12
       
      Just click on the more link. 
  • FCVs will have to offer consumers a viable alternative, especially in terms of performance, durability, and cost, to survive in this ultra-competitive market.
  • dpurdy on 19 Mar 12
     
    Cost per kilowat to generate/
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sconzomic99

Today's Climate Change | A Student's Guide to Global Climate Change | US EPA - 2 views

www.epa.gov/...index.html

co2

shared by sconzomic99 on 19 Mar 12 - No Cached
  • Burning fossil fuels releases carbon dioxide, a heat-trapping gas, into the atmosphere, which is the main reason why the climate is changing.
  • dpurdy on 19 Mar 12
     
    What is climate change
dpurdy

Learn the Basics | A Student's Guide to Global Climate Change | US EPA - 0 views

www.epa.gov/...index.html

climate change co2

shared by dpurdy on 19 Mar 12 - No Cached
  • The Earth is getting warmer because people are adding heat-trapping gases to the atmosphere, mainly by burning fossil fuels. These gases are called greenhouse gases. Warmer temperatures are causing other changes around the world, such as melting glaciers and stronger storms. These changes are happening because the Earth's air, water, and land are all linked to the climate
  • dpurdy on 19 Mar 12
     
    The basics of climate change.
camptif97

Fuel cell - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/Fuel_cells

pollution

shared by camptif97 on 20 Mar 12 - Cached
  • a fuel cell power plant using natural gas as a hydrogen source would create less than one ounce of pollution (other than CO2) for every 1,000 kW produced, compared to 25 pounds of pollutants generated by conventional combustion systems
  • Fuel Cells also produce 97% less nitrogen oxide emissions then conventional coal-fired power plants.
filionmar99

File:World energy consumption by type 2006.png - Wikimedia Commons - 3 views

commons.wikimedia.org/...y_consumption_by_type_2006.png

current biofuel

shared by filionmar99 on 28 Mar 12 - No Cached
    • dpurdy
      dpurdy on 28 Mar 12
       
      Great graph on energy use in each area.
  • current
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

Define Wind Energy - Here are Wind Energy Facts - 0 views

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

what Wind

shared by dpurdy on 03 Nov 11 - No Cached
  • In scientific terms, wind energy is the "force" of winds blowing across the earth’s surface ("Wind Energy"). Wind is caused by uneven heating on the earth’s surface. The equator region receives more heat than say, Antarctica.
  • That heat tries to move from hotter to colder regions. Wind energy was first harvested centuries ago, when early windmills were used to power millstones, pumps, and forges
  • The amount of kinetic energy within Earth's atmosphere is equal to about 10,000 trillion kilowatt-hours.
  • anonymous on 03 Oct 13
     
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dpurdy

EIA Energy Kids - Renewable - 0 views

www.eia.gov/...energy.cfm

sustainable current

shared by dpurdy on 03 Nov 11 - No Cached
    • dpurdy
      dpurdy on 03 Nov 11
       
      Graphic showing US energy production and consumption for all energy sources, fossil fuel and renewable. 
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
  • anonymous on 02 Oct 13
     
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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

Fuel Cells 2000 : Hydrogen : Basics - 1 views

www.fuelcells.org/...basics.html

Hydrogen cost

shared by dpurdy on 03 Nov 11 - Cached
  • How much will Hydrogen fuel cost? The U.S. Department of Energy's Hydrogen, Fuel Cells & Infrastructure Technologies Program is working to achieve the following goals: By 2005, the technology will be available to produce hydrogen at the pump for $3.00 per gallon gasoline equivalent, and DOE wants to validate this technology by 2008.  By 2010, the price goal is $1.50 per gallon of gasoline equivalent (untaxed) at the station. Even $3 a gallon would save most of us money, since FCVs will be two to three times more efficient than internal combustion engine (ICE) vehicles.  If all the goals are met, FCVs offer the promise of energy at $1 a gallon - or less! 
dpurdy

Wave Energy Wave Power Clean Renewable Electricity Generation - Wavegen - 1 views

www.wavegen.co.uk/info_schools_wave_whistles.htm

wave what

shared by dpurdy on 03 Nov 11 - No Cached
  • Ocean waves are a tertiary form of solar energy, in that unequal heating of the Earth’s surface generates wind, and wind blowing over water generates waves. Despite the fact that nearly 75% of the Earth’s surface is covered with water, waves are a largely unexplored source of energy, compared with the progress that has been made in harnessing the sun and wind.
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dpurdy

OWECO By Others - 1 views

www.owec.com/byOTHERS.html

wave form

shared by dpurdy on 03 Nov 11 - No Cached
  • ocean waves is long considered substantive kinetic resource
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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

EIA Energy Kids - Energy Basics - 0 views

www.eia.gov/...energy.cfm

current

shared by dpurdy on 03 Nov 11 - No Cached
  • Energy Is the Ability To Do Work Energy comes in different forms: Heat (thermal) Light (radiant) Motion (kinetic) Electrical Chemical Nuclear energy Gravitational
  • Renewable Energy Renewable energy sources include: Solar energy from the sun, which can be turned into electricity and heat Wind Geothermal energy from heat inside the Earth Biomass from plants, which includes firewood from trees, ethanol from corn, and biodiesel from vegetable oil Hydropower from hydroturbines at a dam
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.
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