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schmettererdav00

Biofuels - What are They and Where Do They Come From? | Sustainable Energy Systemz - 0 views

sustainableenergysystemz.com/...2929

biofuel form

shared by schmettererdav00 on 11 Mar 13 - No Cached
  • Biofuels are made with biomass (biological material from living or recently living organisms) there are many kinds, for example biodiesel involves growing crops that contain large amounts of natural oil, these plants then go through a refining process and subsequently are mixed in with regular diesel to power cars. Bio petrol is made in a similar way; plants are refined to make a natural ethanol.
carpenteraut98

Fuel Cells for a Sustainable Future? | Tyndall°Centre for Climate Change Rese... - 0 views

www.tyndall.ac.uk/...fuel-cells-sustainable-future

fuel cell sustainable

shared by carpenteraut98 on 11 Mar 13 - No Cached
  • >It is found that there are both technical and non technical barriers to the development of stationary fuel cells as a major component towards sustainable energy.
  • >It is found that there are both technical and non technical barriers to the development of stationary fuel cells as a major component towards sustainable energy.
  • carpenteraut98 on 11 Mar 13
     
    "It is found that there are both technical and non technical barriers to the development of stationary fuel cells as a major component towards sustainable energy"
kramerjac99

Energy Source: Tidal Power | Renewable Energy & Efficiency | Pembina Institute - 0 views

www.pembina.org/tidal

tidal energy

shared by kramerjac99 on 11 Mar 13 - No Cached
  • idal power can be harnessed using a barrage (dam) built across an estuary that captures the potential energy generated by the change in height (or head) between high and low tides. As the tide goes in and out, the water flows through tunnels in the dam. The ebb and flow are used to either turn a water turbine or compress air through a pipe that then turns a turbine, which generates electricity. Tidal Fences and Turbines Tidal fences and turbines can also be used to capture tidal power. Tidal fences are turbines that operate like giant turnstiles, while tidal turbines are similar to wind turbines. In both cases, electricity is generated when the turbines are turned by the tidal currents that occur in coastal waters. Ocean currents generate relatively more energy than wind (air currents) because ocean water has a higher density than air and therefore applies greater force on the turbines.
  • kramerjac99 on 11 Mar 13
     
    how we use it.
kilburnzac00

How Much Solar Energy is Used in the World? | Solar Energy Facts - 1 views

solarenergyfactsblog.com/ar-energy-is-used-in-the-world

much energy world US How solar power

shared by kilburnzac00 on 11 Mar 13 - No Cached
  • How much solar energy is used in the world? Global capacity for solar energy production reached 39.8 GigaWatts (0.0398 terawatts) in 2010 . Here are the top 10 solar energy producing countries in the world:
  • United States (1,650 MW
  • whalenkil98 on 11 Mar 13
     
    how much solar energy is used in the US
lemairenat98

Project Objectives - 0 views

tide picture

shared by lemairenat98 on 12 Mar 13 - No Cached
westkea00

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.
tavarreskat99

tidal energy - 0 views

www.odec.ca/...tidal.html

tide energy cost

shared by tavarreskat99 on 12 Mar 13 - No Cached
  • Tidal energy is the utilization of the variations in sea level caused primarily by the gravitational effects of the moon, combined with the rotation of the Earth.
  • Tidal energy is a clean, renewable energy resource, but its environmental impacts and accessibility, limit its potential to become a major provider of electricity. Where tidal energy is a viable resource, it may prove to be expensive at first, but economical in the long run if the technology improves.
adamsaub98

Lester Allan Pelton - Hydroelectric Power - 0 views

inventors.about.com/...bl_lester_pelton.htm

history

shared by adamsaub98 on 12 Mar 13 - No Cached
  • Lester Pelton invented a type of free-jet water turbine called the Pelton Wheel or Pelton turbine. Lester Pelton was born in 1829 in Vermillion, Ohio. In 1850, he immigrated to California
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."
jack wells

My Library for wind - 0 views

www.diigo.com/my

sustainable wind

shared by jack wells on 12 Mar 13 - No Cached
  • One of the most important is that wind power is the least expensive of all other forms of alternative energy.  Wind turbines generate electricity at around 5 cents per kWh (Kilowatt Hour), which is comparable to the new coal and/or oil burning power plants.  The costs are projected to decline even more as technology improves, and this is very important because most of the cost with wind power is in manufacturing.  Once the wind turbines are in place there is little cost to maintain and wind power is free.
  • jack wells on 12 Mar 13
     
    "One of the most important is that wind power is the least expensive of all other forms of alternative energy.  Wind turbines generate electricity at around 5 cents per kWh (Kilowatt Hour), which is comparable to the new coal and/or oil burning power plants.  The costs are projected to decline even more as technology improves, and this is very important because most of the cost with wind power is in manufacturing.  Once the wind turbines are in place there is little cost to maintain and wind power is free."
dextereli99

SOLAR POWER BENEFITS - 0 views

www.vivasolar.com/solarpowerbenifits.html

solar sustainable cost pollution

shared by dextereli99 on 12 Mar 13 - No Cached
  • Advantages of solar power are many. Although solar power is an energy source that we have only recently tapped into, it may easily become the most important energy source of the future. • Solar power is a renewable and natural resource. • Solar power is non-polluting. Unlike oil, solar power does not emit greenhouse gases or carcinogens into the air. • Light and energy from the sun costs nothing. Once you purchase the equipment to collect and convert energy from the sun, it costs you nothing to run. • Solar cells require little maintenance. • Solar cells can last a lifetime. • Solar power is silent.
  • • Solar energy can be used to heat water, dry clothes, heat swimming pools, power attic fans, power small appliances, produce light for both indoors and outdoors, and even to power cars, among other things.
  • • Solar energy products can be very expensive. The initial cost is, perhaps, the main disadvantage of solar energy. • To reach maximum level of efficiency you need a relatively large area to install solar panels. • Depending where you live (Arizona vs. Alaska, around many shady trees or in the desert, etc.), you will get different results with solar energy systems.
  • ...3 more annotations...
  • • If you have a really good solar energy system, one that produces even more energy than you use, your utility company might buy that extra energy from you. • When you use solar energy, you and your home become independent on foreign or other sources of energy which raise costs quickly. • To run solar water pumps, you do not even need to connect to a gas or power grid. • Solar energy cannot be produced at night or if there is a lot of pollution in the air or clouds over the sun.
  • • Of course, realize you can have a battery backup system for your solar energy system that will take care of the problems that could arise when the sun does not. • You can install solar energy in remote locations. • If there is a power outage, but you run on solar, you will still have electricity! • As your energy needs grow, you can add more solar panels
  • • Technology for solar energy is constantly improving.
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