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dpurdy

RenewableUK - Where Does Tidal Energy Come From? - 0 views

www.bwea.com/tides.html

what Tide

shared by dpurdy on 03 Nov 11 - No Cached
  • Where Does Tidal Energy Come From? The gravitational force of the Earth stops the ocean from floating off into space, just like everything else. The Moon also has a very weak gravitational effect on the Earth, which is not normally noticable as far as falling teacups are concerned, but the ocean, which can flow around the globe to even out differences, is noticably affected.
  • anonymous on 28 Sep 13
     
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dpurdy

What is wave energy? | Pelamis Wave Power - 4 views

www.pelamiswave.com/...what-is-wave-energy

wave what pollution sustainable co2 form

shared by dpurdy on 03 Nov 11 - No Cached
  • What is wave energy? Waves are generated by the passage of wind across the surface of the sea.  Energy is transferred from the wind to the waves.  Waves travel vast distances across the ocean and at great speed and the energy is concentrated near the water surface.  The energy within a wave is proportional to the square of the wave height.  Therefore a two-meter high wave has four times the power of a one-meter high wave. The longer and stronger the wind blows over the surface of the sea, the higher, longer, faster and more powerful the sea is.
  • Although wave energy is a form of concentrated wind energy, as it has often travelled over large distances it is regularly out of phase with the local wind conditions.  Wave energy can therefore help to balance output variability from other renewable sources and maximise the efficient use of the electricity networks.   Wave energy is also more predictable than many other forms of renewable energy, such as wind or solar, and can be forecast accurately up to five days in advance.
  • Wave energy is clean and renewable!  It is one of the last renewable energy forms which mankind has yet to harness, and its potential is huge.
  • ...1 more annotation...
  • Wave energy could play a major part in the world’s efforts to combat climate change, potentially displacing 1 – 2 billion tonnes of CO2 per annum from conventional fossil fuel generating sources.
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.
dylan purner

Business Opportunities Assessment for Solar Photovoltaic (PV) Market in Brazil - 0 views

www.prweb.com/...prweb11130878.htm

photovoltaic solar cost opportunities business

shared by dylan purner on 20 Sep 13 - No Cached
  • The Brazilian government still awaits a reduction in solar prices to create a specific auction by the end of 2013 or the beginning of 2014. However, the Ministry of Mines and Energy (MME) does not demonstrate any signs of this happening.
  • In 2013, however, revenue and capacity installed are expected to double: projects will be delivered, the resolution 482/2012 will have a major impact, and X% of the National Association of Electric Energy’s (ANEEL’s) research and development (R&D) will conclude. Capacity installed expectations in 2013 will near X megawatts (MW); in 2014, X MW; in 2015, X MW; and beyond, faster expansion is expected. Currently, capacity installed for the solar market is X MW, but it is expected to reach X MW by 2017. The total possible capacity installed for Brazil is close to X gigawatts (GW). This market revenue will have a X% compound annual growth rate (CAGR) during the forecast period (2012–2017) due to ANEEL´s R&D, international events, and the resolution 482/2012 cost reductions. Now, market revenue is close to $X million and can reach $X million by 2017.
  • Distributed generation could grow faster with financial support, better service from energy concessionaries, and cost reductions; nonetheless, it will grow considerably.
  • ...2 more annotations...
  • Distributed microgeneration: electricity generating system, with capacity installed less than or equal to
  • kilowatts (kW); uses solar energy connected to the distribution network through facilities of consumer units Distributed minigeneration: electricity generating system with a capacity installed greater than 100 kW and less than or equal to X MW for the same sources; connected to the distribution network through facilities of consumer units
gaworeckilog99

Fuel cell - Simple English Wikipedia, the free encyclopedia - 0 views

simple.wikipedia.org/...Fuel_cell

fuel cell co2

shared by gaworeckilog99 on 20 Sep 13 - No Cached
  • t has to be produced first, and if this is done by burning fossil fuels, it does not help against climate change. But, the hydrogen fuel cell will help against climate change in future, because scientists are trying to find new ways to make hydrogen without using fossil fuels.
charlesjos00

Where Does Solar Energy Come from - Ask.com - 0 views

www.ask.com/...re-does-solar-energy-come-from

form

shared by charlesjos00 on 20 Sep 13 - No Cached
  • Solar Energy comes from Sun. Sun is a hot ball of Hydrogen & Helium. Due to fission reaction of Hydrogen molecules, energy is emitted which is known as Solar Energy.
  • Solar thermal energy transfers heat directly from the sun to heat air or water for residential or commercial use.
  • Solar energy comes from the lowest point of the sun. The sun bears a constant stream of thermonuclear explosions as hydrogen atoms are merged into helium atoms. The Sun is like a humongous power station that constantly does a reaction that lets out light.
  • ...1 more annotation...
  • Solar energy comes from the lowest point of the sun.
frasercol99

Top 10 Sources for Biofuel : Discovery News - 0 views

news.discovery.com/...top-ten-sources-biofuel.htm

biofuel form

shared by frasercol99 on 20 Sep 13 - No Cached
  • Organic matter is one such source. Materials like corn and soybeans have oil extracts that can be converted to ethanol or biodiesel
  • more sustainable than petroleum, meaning they can be regrown and remain productive with less negative impact on our ecosystem.
  • Some biofuels that provide more long-term benefits may prove too expensive to pursue
  • ...5 more annotations...
  • Runge estimated that in the United States alone, some 1.3 billion tons of cellulose material could be harvested for biofuel use. Cellulose is basically fiber, and can be found in things ranging from switchgrass to trees such as hybrid poplar and willow.
  • 1. Cellulose
  • 2. Algal Oil
  • Because algae are grown in water, they overcome one of the major problems faced by other biofuels -- competition for land with agricultural crops.
  • 3. Corn
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.
charlesjos00

How Solar Works in 4 Steps « Energy4Home - 0 views

blogs.constellation.com/...how-solar-works-in-4-steps

solar steps convert

shared by charlesjos00 on 27 Sep 13 - No Cached
  • 1) Individual silicon based (most commonly) cells called photovoltaics (PV) make up the modern day solar panel. These PV cell clusters perform the task of converting incoming sunlight directly into electricity. 2) Wires attached to the panels transport the converted electricity to a piece of equipment called an inverter. The job of the inverter is to convert the solar generated Direct Current (DC) electricity into the type of power your home can use, which is called Alternating Current (AC). 3) After the electricity travels through the inverter, the AC electricity is then transported via wire to your breaker panel to meet your home’s electric demands. 4) The process doesn’t end there, though. There are times when your panels will generate more power than you consume and times when you aren’t generating enough electricity (night times and periods of low light). When your panels are not generating enough solar electricity, you will continue to get power from your local utility. However, when you’re generating a surplus of solar electricity, that excess clean energy will be “net metered” to your local utility grid and you may earn a credit on your power bill for that net metered electricity.
kurishkri00

About Wind Energy - 0 views

www.masscec.com/...wind-energy

wind form

shared by kurishkri00 on 23 Sep 13 - No Cached
  • kurishkri00 on 23 Sep 13
     
    Wind turbines harness wind energy to produce electricity that can be used to power homes and businesses across the Commonwealth. Wind power systems range from small turbines that power a single home or business to large, multi-turbine wind farms that feed into the grid and generate enough electricity to power thousands of Massachusetts homes.
bakereli00

Biofuels Cause Global Warming - 0 views

www.outsidethebeltway.com/biofuels_cause_global_warming_

biofuel co2

shared by bakereli00 on 23 Sep 13 - No Cached
  • Almost all biofuels used today cause more greenhouse gas emissions than conventional fuels if the full emissions costs of producing these “green” fuels are taken into account,
sokolkyl00

Switch to Clean Energy | A Student's Guide to Global Climate Change | US EPA - 1 views

www.epa.gov/...clean-energy.html

co2 solar

shared by sokolkyl00 on 25 Sep 13 - No Cached
  • When we get electricity from renewable energy sources like wind and solar power, we avoid the carbon dioxide emissions that would have come from burning fossil fuels like coal, oil, or natural gas.
westkea00

Wave power in the United States - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...ave_power_in_the_United_States

shared by westkea00 on 25 Sep 13 - No Cached
  • Wave power in the United States is under development in several locations off the east & west coasts as well as Hawaii. It has moved beyond the research phase and is producing reliable energy for the Grid. It's use to-date has been for situations where other forms of energy production are not economically viable and as such, the power output is currently modest. But major installations are planned to come on-line within the next few years. Projects
  • Projects
bishophan00

Where Does Wind Power Come From? - 0 views

www.renewableenergyworld.com/...here-does-wind-power-come-from

wind

shared by bishophan00 on 25 Sep 13 - No Cached
  •  Wind power is an interesting renewable energy source as wind turbines can essentially be placed anywhere geographically where there is ample wind to turn the wind blades.
  • One thing that we haven't written about extensively on the MyEnergySolution.com blog is wind power.  Wind power is an interesting renewable energy source as wind turbines can essentially be placed anywhere geographically where there is ample wind to turn the wind blades.
  • o put this in context, an average U.S. household uses about 10 megawatt-hours (MWh) of electricity each year. One megawatt of installed wind energy from a single large turbine can generate from 2,400 to more than 3,000 MWh annually – enough to power about 250 homes.
westkea00

An electrical approach to wave energy conversion - 0 views

www.sciencedirect.com/...S0960148105002120

shared by westkea00 on 25 Sep 13 - No Cached
  • Motions in nature, for example ocean waves, can play a significant role in tomorrow's electricity production, but the constructions require adaptations to its media. Engineers planning hydropower plants have always taken natural conditions, such as fall height, speed of flow, and geometry, as basic design parameters and constraints in the design
  • Extensive simulations of the wave energy concept are presented, along with results from the experimental setup of a multisided permanent magnet linear generator. The prototype is designed through systematic electromagnetic field calculations. The experimental results are used for the verification of measurements in the design process of future full-scale direct wave energy converters. The present paper, describes the energy conversion concept from a system perspective, and also discusses the economical and some environmental considerations for the project.
westkea00

Pelamis Wave Power - 0 views

www.pelamiswave.com/development-history

shared by westkea00 on 25 Sep 13 - No Cached
  • Since 1998, the Pelamis development programme has covered all aspects of the design from the fundamental concept refinement through to accelerated cycle testing of individual components for reliability.
  • During the first phase of Pelamis development prior to full-scale operations in 2004, extensive numerical modelling and analysis and a range of technology demonstration models at different scales were used to understand survival characteristics in extreme waves and verify the accuracy of our simulations
westkea00

Renewable Energy Sources (4) Wave energy | dnahtigal - 0 views

dnahtigal.wordpress.com/...e-energy-sources-4-wave-energy

shared by westkea00 on 25 Sep 13 - No Cached
  • Waves are caused by the action of winds on the sea. Waves can be many metres in height and contain a great deal of energy. This energy can be harnessed to drive turbines that generate electricity.
  • Wave energy collectors are of two main types. The first type directs waves into man-made channels, where the water passes through a turbine that generates electricity. The second type uses the up and down movement of a wave to push air
  • Wave energy can be harnessed in coastal areas, close to the shore. There has been one such device working on the island of Islay in Scotland since the early 1990s, producing 75kW of electricity.
mattisonmar00

How Can Wind Be Turned into Electricity - Ask.com - 1 views

www.ask.com/...ind-be-turned-into-electricity

wind convert

shared by mattisonmar00 on 23 Sep 13 - No Cached
  • The wind turbine is a rotating machine that turns the kinetic energy of wind into mechanical energy. The energy can then be used by machines or converted into electricity and stored.
thibodeaueth00

HowStuffWorks "10 Incredible Wind Power Facts" - 0 views

science.howstuffworks.com/...10-wind-power-facts3.htm

wind

shared by thibodeaueth00 on 23 Sep 13 - No Cached
  • 8: One Megawatt of Wind Energy = 2,600 Fewer Tons of Carbon Dioxide So, with all the noise about clean energy, what kind of improvement are we really talking about with wind? Consider that every year 1MW of wind energy can offset approximately 2,600 tons of carbon dioxide (CO2) [source: NREL], and the interest comes into focus. The simple math is less fossil fuel consumption equals less CO2. And measuring carbon reduction has become a key benchmark for monitoring the progress of alternative energy adoption.
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