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brownale99

Green Rock Energy - Geothermal Energy - Sustainability - 0 views

www.greenrock.com.au/geothermalSustainability.php

geothermal sustainable

shared by brownale99 on 22 Oct 12 - No Cached
  • The Benefits "Geothermal energy has the potential to generate and deliver sustainable supplies of clean, renewable base load power. Depending on the nature of the resource and the reservoir, individual production wells have the potential to generate consistent supplies of base load power for decades."
  • Geothermal energy has the potential to generate and deliver sustainable supplies of clean, renewable base load power.
  • individual production wells have the potential to generate consistent supplies of base load power for decades.
  • ...2 more annotations...
  • Base load electricity generated from geothermal energy is clean, renewable and has minimal impact on the environment.
  • Unlike burning fossil fuels, the process emits no greenhouse gases, pollution or hazardous wastes.
  • messinaaar98 on 22 Oct 12
     
    "The Benefits "Geothermal energy has the potential to generate and deliver sustainable supplies of clean, renewable base load power. Depending on the nature of the resource and the reservoir, individual production wells have the potential to generate consistent supplies of base load power for decades.""
  • gazdiknic99 on 11 Mar 13
     
    main idea, supporting facts, and conclusion
  • brownale99 on 11 Mar 13
     
    ""Geothermal energy has the potential to generate and deliver sustainable supplies of clean, renewable base load power. Depending on the nature of the resource and the reservoir, individual production wells have the potential to generate consistent supplies of base load power for decades.""
hughesacam99

Wave Energy Pros and Cons - Tidal and Ocean Wave Power Still Niche Technologies | Green... - 2 views

www.greenworldinvestor.com/...power-still-niche-technologies

pros wave energy

shared by hughesacam99 on 22 Oct 12 - No Cached
  • Wave Power is quite immature,costly and unproven in large scale. While some companies have made good progress, the technology remains largely unproven and has only been put to actual test in pilot cases.
  • While Wave Energy has been known since the 1700s the progress has been extremely slow.
  • One of the biggest problems of Renewable Power is that it is intermittent in nature as it generates energy only when there are waves. This problem can be solved with energy storage however this leads to additional costs.
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  • Severe Weather like Storms and Typhoons can be quite devastating on the Wave Power Equipment especially those place on the Sea Floor.
  • This is a disadvantage which is common to all  the 3 types of Water based Energy that is Tidal, Hydro and Waver Energy. Some forms of Energy are just better suited to some places.
  • Wave Power generate power quite far away from the consumption of electricity. Transportation of Wave Energy can be quite cumbersome and expensive. Some Wave Energy Generators are converting power at the bottom of the ocean or far away from the shoreline. Moving that power towards where it is used can be difficult.
  • The sight of wave generators around the shoreline can look quite ugly and cause loss of tourism potential around shorelines. Also local residents can have problems even with wave power equipment which is not far offshore. The Cape Wind Energy project off the shore of Massachusetts has been delayed by over 10 years as it has drawn serious objections from the owners of coastal homes about loss in their property values.
  • A Wave Power Plant can cost around$6-10 million million to be spent in building 1 Megawatt.
  • Waver Energy does not require any fuel like most other sources of energy
  • Wave Energy is powered by the waves of the ocean which are totally free just like Wind and Sunlight.
  • Wave Energy Generators can be installed in various sizes with as little as 1 MW. This is not possible for other energy forms which require a minimum large size such as Coal, Nuclear etc.
knightoli99

What Is Geothermal Energy? - 1 views

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

geothermal

shared by knightoli99 on 03 Nov 11 - No Cached
  • What is geothermal energy? Simply put, it is energy from the Earth. Geo refers to the solid part of the Earth and thermal refers to heat energy. Anywhere the Earth's surface is in close proximity to magma or volcanic activity under or near the Earth's surface, we can harness the energy.
  • knightoli99 on 15 Mar 13
     
    "What is geothermal energy? Simply put, it is energy from the Earth. Geo refers to the solid part of the Earth and thermal refers to heat energy. Anywhere the Earth's surface is in close proximity to magma or volcanic activity under or near the Earth's surface, we can harness the energy. According to the Department of Energy,"Geothermal energy technologies use the heat of the earth for direct-use applications, geothermal heat pumps, and electrical power production. Resources of geothermal energy range from the shallow ground to hot water and hot rock found a few miles beneath the Earth's surface and down even deeper to the extremely high temperatures of molten rock called magma. Three power plant technologies are being used to convert hydrothermal fluids to electricity. The type of conversion used depends on whether the fluid is steam or water and its temperature."
dpurdy

Fuel Cells - Electrochemical Power - 1 views

www.fuelcell.no/hydrogen_mainpage_eng.htm

Hydrogen what future

shared by dpurdy on 03 Nov 11 - No Cached
  • Hydrogen as the Main Fuel of the Future Over the last decades hydrogen, (H2) has gained more and more attention as an environmentally friendly fuel and storage medium. Combustion of pure hydrogen produces only water as exhaust. Hydrocarbon and carbon oxide emissions can only come from motor oil in the combustion chamber. Nitrous oxide emissions result from the nitrogen content in the air and increase exponentially with the combustion temperature. By using H2 in fuel cells, practically no pollution occurs. In this respect, hydrogen offers emission levels that are much lower than existing and future standards.
  • Hydrogen is the most common of all elements in the universe.
  • The desire for a long-term transition to a hydrogen society is mainly based on the need to reduce polluting and climate-affecting emissions and the concern about depletion of fossil fuel resources. Today about 90 % of the world's energy consumption is covered by fossil fuels, and most of this comes from a limited number of regions in the world. Even if hydrogen will be used on a large scale in the future, there is still a need for an energy source to produce it. Renewable energy technology such as hydro electricity, wind, wave and solar power are in principle available, but are not yet mature for mass production and/or fully developed. 
  • anonymous on 02 Oct 13
     
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jack wells

Wind Program: Frequently Asked Questions about Wind Energy - 2 views

www1.eere.energy.gov/...faqs.html

Wind cons

shared by jack wells on 03 Nov 11 - No Cached
  • What is wind energy? Wind energy (or wind power) refers to the process by which wind turbines convert the movement of wind into electricity. Winds are caused by the uneven heating of the atmosphere by the sun, the irregularities of the earth's surface, and rotation of the earth. Humans use this wind flow for many purposes: sailing boats, pumping water, and also generating electricity. Wind turbines convert the kinetic energy of the moving wind into electricity.
  • Birds and bats are occasionally killed in collisions with wind turbines. Like any form of development, wind projects can also negatively impact wildlife by altering habitat. Over the past two decades, the impact of wind development on birds has been greatly reduced by improvements in turbine design and particularly through improved project and turbine siting.
  • dpurdy on 03 Nov 11
     
    How do wind turbines work? A wind turbine works like a fan, but in reverse: instead of using electricity to make wind, like a fan, wind turbines use wind to make electricity. The wind turns the turbine's blades, which spin a shaft connected to a generator to make electricity.
  • jack wells on 11 Mar 13
     
    wind energy facts.
dpurdy

EIA Energy Kids - Geothermal - 3 views

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

geothermal what location how pollution history sustainable

shared by dpurdy on 03 Nov 11 - No Cached
  • Geothermal Basics What Is Geothermal Energy? The word geothermal comes from the Greek words geo (earth) and therme (heat). So, geothermal energy is heat from within the Earth. We can recover this heat as steam or hot water and use it to heat buildings or generate electricity. Geothermal energy is a renewable energy source because the heat is continuously produced inside the Earth.
  • Geothermal energy is generated in the Earth's core. Temperatures hotter than the sun's surface are continuously produced inside the Earth by the slow decay of radioactive particles, a process that happens in all rocks. The Earth has a number of different layers:
  • Where Geothermal Energy is Found The ring of fire goes around the edges of the Pacific. The map shows that volcanic activity occurs around the Pacific rim.Source: National Energy Education Development Project (Public Domain) Naturally occurring large areas of hydrothermal resources are called geothermal reservoirs. Most geothermal reservoirs are deep underground with no visible clues showing above ground. But geothermal energy sometimes finds its way to the surface in the form of: Volcanoes and fumaroles (holes where volcanic gases are released) Hot springs Geysers
  • ...6 more annotations...
  • U.S. Geothermal Is Mostly in the West Most of the geothermal reservoirs in the United States are located in the western States and Hawaii.
  • Electricity generation power plants require water or steam at very high temperature (300° to 700°F). Geothermal power plants are generally built where geothermal reservoirs are located within a mile or two of the surface.
  • The United States Is the Leader in Geothermal Power Generation The United States leads the world in electricity generation with geothermal power.  In 2009, U.S. geothermal power plants produced 15 billion kilowatt-hours (kWh), or 0.4% of total U.S. electricity generation.  In 2009, five States had geothermal power plants:
  • Geothermal power plants use hydrothermal resources that have two common ingredients: water (hydro) and heat (thermal). Geothermal plants require high temperature (300°F to 700°F) hydrothermal resources that may come from either dry steam wells or hot water wells.
  • high-pressure hot water from deep inside the Earth and convert it to steam to drive the generator turbines. When the steam cools, it condenses to water and is injected back into the ground to be used over and over again. Most geothermal power plants are flash steam plants.
  • Geothermal Power Plants Have Low Emission Levels Geothermal power plants do not burn fuel to generate electricity, so their emission levels are very low. They release less than 1% of the carbon dioxide emissions of a fossil fuel plant. Geothermal plants use scrubber systems to clean the air of hydrogen sulfide that is naturally found in the steam and hot water. Geothermal plants emit 97% less acid rain-causing sulfur compounds than are emitted by fossil fuel plants. After the steam and water from a geothermal reservoir have been used, they are injected back into the Earth.
  • anonymous on 02 Oct 13
     
    Most quality online stores. Know whether you are a trusted online retailer in the world. Whatever we can buy very good quality. and do not hesitate. Everything is very high quality. Including clothes, accessories, bags, cups. Highly recommended. This is one of the trusted online store in the world. View now www.retrostyler.com
deepat00

Geothermal energy facts - Interesting energy facts - 0 views

interestingenergyfacts.blogspot.com/...geothermal-energy-facts.html

geothermal history

shared by deepat00 on 12 Mar 13 - No Cached
  • Geothermal energy supplies less than 10 % of the world's energy.
  • Geothermal energy is clean and safe for the surrounding environment.
  • Geothermal energy is sustainable because hot water can be re-injected into the ground.
  • ...11 more annotations...
  • Geothermal energy can be found in the form of volcanoes, hot springs and geysers.
  • Geothermal energy's advantage is also the fact that geothermal power stations are relatively small, and have a lesser impact on the environment than for instance hydroelectric plants.
  • Geothermal energy use has very low emissions of greenhouse gases to about three percent of the carbon dioxide emissions of a fossil power station.
  • Geothermal energy is extremely efficient (almost 100 %) energy source where only real source of losing energy is from turbine friction.
  • Geothermal energy has three main uses: Heating, Electricity generation and Geothermal heat pumps.
  • Geothermal energy's amount of electricity is less than 1 percent of total electricity produced in the USA.
  • Geothermal energy is giving 18 % of Iceland's total electricity.
  • Geothermal energy could produce 10 percent of US electricity by the year 2050.
  • Geothermal energy is used since ancient times in form of hot water.
  • Geothermal energy could supply US with more than 30,000 MW of power by 2025.
  • Geothermal energy has minimum negative environmental impact.
  • anonymous on 03 Oct 13
     
    Comprehensive up-to-date news coverage, aggregated from sources all over theworld by Google News.‎Finance - ‎About Google News - ‎Languages and regions - ‎Editors' Pickswww.killdo.de.ggNews Online from Australia and the World ...News headlines from Australia and the world. The latest national, world, business, sport, entertainment and technology news from News Limited news papers.www.killdo.de.ggBreaking News Updates | Latest News Headlines ...Breaking News, Latest News and Current News from FOXNews.com. Breakingnews and video. Latest Current News: U.S., World, Entertainment, Health, ...www.killdo.de.gg
whalenkil98

Photovoltaics - Timeline of the History of Photovoltaics - 0 views

inventors.about.com/...Photovoltaics.htm

solar convert

shared by whalenkil98 on 12 Mar 13 - Cached
  • 1839: Nineteen-year-old Edmund Becquerel, a French experimental physicist, discovered the photovoltaic effect while experimenting with an electrolytic cell made up of two metal electrodes. 1873: Willoughby Smith discovered the photoconductivity of selenium.
  • kenyonlau99 on 12 Mar 13
     
    "Today's photovoltaic systems are used to generate electricity to pump water, light up the night, activate switches, charge batteries, supply power to the utility grid, and much more. 1839: Nineteen-year-old Edmund Becquerel, a French experimental physicist, discovered the photovoltaic effect while experimenting with an electrolytic cell made up of two metal electrodes. 1873: Willoughby Smith discovered the photoconductivity of selenium. 1876: Adams and Day observed the photovoltaic effect in solid selenium. 1883: Charles Fritts, an American inventor, described the first solar cells made from selenium wafers. 1887: Heinrich Hertz discovered that ultraviolet light altered the lowest voltage capable of causing a spark to jump between two metal electrodes. 1904: Hallwachs discovered that a combination of copper and cuprous oxide was photosensitive. Einstein published his paper on the photoelectric effect. 1914: The existence of a barrier layer in PV devices was reported. 1916: Millikan provided experimental proof of the photoelectric effect. 1918: Polish scientist Czochralski developed a way to grow single-crystal silicon. 1923: Albert Einstein received the Nobel Prize for his theories explaining the photoelectric effect. 1951: A grown p-n junction enabled the production of a single-crystal cell of germanium. 1954: The PV effect in Cd was reported; primary work was performed by Rappaport, Loferski and Jenny at RCA. Bell Labs researchers Pearson, Chapin, and Fuller reported their discovery of 4.5% efficient silicon solar cells; this was raised to 6% only a few months later (by a work team including Mort Prince). Chapin, Fuller, Pearson (AT&T) submitted their results to the Journal of Applied Physics. AT&T demonstrated solar cells in Murray Hill, New Jersey, then at the National Academy of Science Meeting in Washington, DC. 1955: Western Electric began to sell commercial licenses for silicon PV technologies; early successful products included PV-powered dolla
dpurdy

How do Photovoltaics Work? - NASA Science - 1 views

science.nasa.gov/...solarcells

solar history convert

shared by dpurdy on 08 Mar 13 - No Cached
  • Photovoltaics is the direct conversion of light into electricity at the atomic level. Some materials exhibit a property known as the photoelectric effect that causes them to absorb photons of light and release electrons. When these free electrons are captured, an electric current results that can be used as electricity.
  • When light energy strikes the solar cell, electrons are knocked loose from the atoms in the semiconductor material. If electrical conductors are attached to the positive and negative sides, forming an electrical circuit, the electrons can be captured in the form of an electric current -- that is, electricity. This electricity can then be used to power a load, such as a light or a tool.
  • bolendev99 on 08 Mar 13
     
    " Solar cells are made of the same kinds of semiconductor materials, such as silicon, used in the microelectronics industry. For solar cells, a thin semiconductor wafer is specially treated to form an electric field, positive on one side and negative on the other. When light energy strikes the solar cell, electrons are knocked loose from the atoms in the semiconductor material. If electrical conductors are attached to the positive and negative sides, forming an electrical circuit, the electrons can be captured in the form of an electric current -- that is, electricity. This electricity can then be used to power a load, such as a light or a too"
  • dpurdy on 12 Mar 13
     
    "The photoelectric effect was first noted by a French physicist, Edmund Bequerel, in 1839, who found that certain materials would produce small amounts of electric current when exposed to light. In 1905, Albert Einstein described the nature of light and the photoelectric effect on which photovoltaic technology is based, for which he later won a Nobel prize in physics. The first photovoltaic module was built by Bell Laboratories in 1954. It was billed as a solar battery and was mostly just a curiosity as it was too expensive to gain widespread use. In the 1960s, the space industry began to make the first serious use of the technology to provide power aboard spacecraft. Through the space programs, the technology advanced, its reliability was established, and the cost began to decline. During the energy crisis in the 1970s, photovoltaic technology gained recognition as a source of power for non-space applications."
olearydev99

Sustainability Basic Information - 0 views

www.epa.gov/...basicinfo.htm

Sustainability sustainable

shared by olearydev99 on 15 Mar 13 - Cached
  • olearydev99 on 15 Mar 13
     
    "What is sustainability? Sustainability is based on a simple principle: Everything that we need for our survival and well-being depends, either directly or indirectly, on our natural environment.  Sustainability creates and maintains the conditions under which humans and nature can exist in productive harmony, that permit fulfilling the social, economic and other requirements of present and future generations."
mannixjul00

How Does Tidal Energy Work - 0 views

oilprice.com/...ow-Does-Tidal-Energy-Work.html

tide convert

shared by mannixjul00 on 03 Nov 12 - No Cached
  • Tidal turbines use similar technology to wind turbines, although their blades are much shorter and stronger. So a good way to think of them is as underwater windmills. Basically the water currents turn the turbines, which in turn activate a generator that produces electricity. These systems work best where there are very strong tidal zones (Norwegian and British coastlines.) and although it is still in it’s infancy it does show great promise.The upfront cost of these tidal stream systems is very high and also installation and maintenance is difficult.
  • dpurdy on 03 Nov 12
     
    "Tidal turbines use similar technology to wind turbines, although their blades are much shorter and stronger. So a good way to think of them is as underwater windmills. Basically the water currents turn the turbines, which in turn activate a generator that produces electricity. These systems work best where there are very strong tidal zones (Norwegian and British coastlines.) and although it is still in it's infancy it does show great promise. The upfront cost of these tidal stream systems is very high and also installation and maintenance is difficult."
dynesbri97

Wind - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/Wind

shared by dynesbri97 on 13 Mar 12 - Cached
  • Wind is the flow of gases on a large scale. On Earth, wind consists of the bulk movement of air. In outer space, solar wind is the movement of gases or charged particles from the sun through space, while planetary wind is the outgassing of light chemical elements from a planet's atmosphere into space. Winds are commonly classified by their spatial scale, their speed, the types of forces that cause them, the regions in which they occur, and their effect. The strongest observed winds on a planet in our solar system occur on Neptune and Saturn.
  • Winds can shape landforms, via a variety of aeolian processes such as the formation of fertile soils, such as loess, and by erosion. Dust from large deserts can be moved great distances from its source region by the prevailing winds; winds that are accelerated by rough topography and associated with dust outbreaks have been assigned regional names in various parts of the world because of their significant effects on those regions. Wind affects the spread of wildfires. Winds disperse seeds from various plants, enabling the survival and dispersal of those plant species, as well as flying insect populations. When combined with cold temperatures, wind has a negative impact on livestock. Wind affects animals' food stores, as well as their hunting and defensive strategies.
  • Wind is caused by differences in pressure. When a difference in pressure exists, the air is accelerated from higher to lower pressure. On a rotating planet, the air will be deflected by the Coriolis effect, except exactly on the equator. Globally, the two major driving factors of large-scale winds (the atmospheric circulation) are the differential heating between the equator and the poles (difference in absorption of solar energy leading to buoyancy forces) and the rotation of the planet. Outside the tropics and aloft from frictional effects of the surface, the large-scale winds tend to approach geostrophic balance. Near the Earth's surface, friction causes the wind to be slower than it would be otherwise. Surface friction also causes winds to blow more inward into low pressure areas.
  • ...1 more annotation...
  • [hide]General wind classifications Tropical cyclone classifications (all winds are 10-minute averages) Beaufort scale[17] 10-minute sustained winds (knots) General term[20] N Indian Ocean IMD SW Indian Ocean MF Australian region South Pacific BoM, BMKG, FMS, MSNZ NW Pacific JMA NW Pacific JTWC NE Pacific & N Atlantic NHC & CPHC 0 <1 Calm Low Pressure Area Tropical disturbance Tropical low Tropical Depression Tropical depression Tropical depression Tropical depression 1 1–3 Light air 2 4–6 Light breeze 3 7–10 Gentle breeze 4 11–16 Moderate breeze 5 17–21 Fresh breeze Depression 6 22–27 Strong breeze 7 28–29 Moderate gale Deep depression Tropical depression 30–33 8 34–40 Fresh gale Cyclonic storm Moderate tropical storm Tropical cyclone (1) Tropical storm Tropical storm Tropical storm 9 41–47 Strong gale 10 48–55 Whole gale Severe cyclonic storm Severe tropical storm Tropical cyclone (2) Severe tropical storm 11 56–63 Storm 12 64–72 Hurricane Very severe cyclonic storm Tropical cyclone Severe tropical cyclone (3) Typhoon Typhoon Hurricane (1) 13 73–85 Hurricane (2) 14 86–89 Severe tropical cyclone (4) Major hurricane (3) 15 90–99 Intense tropical cyclone 16 100–106 Major hurricane (4) 17 107–114 Severe tropical cyclone (5) 115–119 Very intense tropical cyclone Super typhoon >120 Super cyclonic storm Major hurricane (5)
smithree98

Hydrogen Fuel-Cell Vehicles - Is Hydrogen the Fuel of the Future? - 1 views

environment.about.com/...fcv.htm

hydrogen fuel all benifits

shared by smithree98 on 15 Mar 12 - No Cached
  • The benefits of ditching fossil fuels for hydrogen are many, of course. Burning fossil fuels like coal, natural gas and oil to heat and cool our buildings and run our vehicles takes a heavy toll on the environment, contributing significantly to both local problems such as elevated particulate levels and global ones such as a warming climate. The only by-product of running a hydrogen-powered fuel cell is oxygen and a trickle of water, neither of which will cause any harm to human health or the environment.
  • But right now, 95 percent of the hydrogen available in the United States is either extracted from fossil fuels or made using electrolytic processes powered by fossil fuels, thus negating any real emissions savings or reduction in fossil-fuel usage. Only if renewable energy sources—solar, wind and others—can be harnessed to provide the energy to process hydrogen fuel can the dream of a truly clean hydrogen fuel be realized.
  • They concluded that we’d lower greenhouse gas emissions more by driving gasoline/electric hybrid cars than by driving fuel-cell cars run on hydrogen from coal. Hydrogen made using natural gas would fare a little bit better in terms of pollution output, while making it from wind power would be a slam-dunk for the environment.
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  • many reasons, ranging from safety to cost to lack of demand.
  • Another problem is the lack of hydrogen refueling stations
  • replacing the fossil fuels responsible for global warming and various nagging forms of pollution.
  • they are spending upwards of $1 million to produce each one due to the advanced technology involved and low production runs. Toyota hopes to reduce its costs per fuel-cell vehicle to around $50,000 by 2015
  • smithree98 on 22 Oct 12
     
    says most things about hydrogen and what it does
filionmar99

Biofuel - Wikipedia, the free encyclopedia - 1 views

en.wikipedia.org/Biofuel

biofuel current

shared by filionmar99 on 13 Mar 12 - Cached
  • Biodiesel is made from vegetable oils and animal fats. Biodiesel can be used as a fuel for vehicles in its pure form
  • Most transportation fuels are liquids, because vehicles usually require high energy density, as occurs in liquids and solids.
  • First generation biofuels 'First-generation' or conventional biofuels are biofuels made from sugar, starch, and vegetable oil.
  • ...4 more annotations...
  • Examples include wood, sawdust, grass trimmings, domestic refuse, charcoal, agricultural waste, non-food energy crops, and dried manure.
  • In 2010 worldwide biofuel production reached 105 billion liters (28 billion gallons US), up 17% from 2009, and biofuels provided 2.7% of the world's fuels for road transport, a contribution largely made up of ethanol and biodiesel.[2] Global ethanol fuel production reached 86 billion liters (23 billion gallons US) in 2010, with the United States and Brazil as the world's top producers, accounting together for 90% of global production. The world's largest biodiesel producer is the European Union, accounting for 53% of all biodiesel production in 2010.[2] As of 2011, mandates for blending biofuels exist in 31 countries at the national level and in 29 states/provinces.[3] According to the International Energy Agency, biofuels have the potential to meet more than a quarter of world demand for transportation fuels by 2050.[4]
  • In 2010 worldwide biofuel production reached 105 billion liters (28 billion gallons US), up 17% from 2009,[3] and biofuels provided 2.7% of the world's fuels for road transpor
  • Global ethanol fuel production reached 86 billion liters (23 billion gallons US) in 2010, with the United States and Brazil as the world's top producers, accounting together for 90% of global production.
  • nelsonbri98 on 15 Mar 12
     
    Bioethano
dpurdy

HowStuffWorks "How the Hydrogen Economy Works" - 0 views

auto.howstuffworks.com/...hydrogen-economy2.htm

pollution location sustainable co2

shared by dpurdy on 03 Nov 11 - No Cached
  • The elimination of pollution caused by fossil fuels - When hydrogen is used in a fuel cell to create power, it is a completely clean technology. The only byproduct is water. There are also no environmental dangers like oil spills to worry about with hydrogen. The elimination of greenhouse gases - If the hydrogen comes from the electrolysis of water, then hydrogen adds no greenhouse gases to the environment. There is a perfect cycle -- electrolysis produces hydrogen from water, and the hydrogen recombines with oxygen to create water and power in a fuel cell. The elimination of economic dependence - The elimination of oil means no dependence on the Middle East and its oil reserves. Distributed production - Hydrogen can be produced anywhere that you have electricity and water. People can even produce it in their homes with relatively simple technology.
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mattianic99

Solar energy - Wikipedia, the free encyclopedia - 3 views

en.wikipedia.org/...Solar_energy

shared by mattianic99 on 09 Mar 12 - Cached
  • Solar energy, radiant light and heat from the sun
  • radiant light and heat from the sun,
  • Solar energy, radiant light and heat from the sun, has been harnessed by humans since ancient times using a range of ever-evolving technologies. Solar energy technologies include solar heating, solar photovoltaics, solar thermal electricity, solar architecture and artificial photosynthesis, which can make considerable contributions to solving some of the most urgent energy problems the world now faces.[1] [2]
  • ...2 more annotations...
  • "the development of affordable, inexhaustible and clean solar energy technologies will have huge longer-term benefits. It will increase countries’ energy security through reliance on an indigenous, inexhaustible and mostly import-independent resource, enhance sustainability, reduce pollution, lower the costs of mitigating climate change, and keep fossil fuel prices lower than otherwise. These advantages are global.
  • Solar technologies are broadly characterized as either passive solar or active solar depending on the way they capture, convert and distribute solar energy. Active solar techniques include the use of photovoltaic panels and solar thermal collectors to harness the energy. Passive solar techniques include orienting a building to the Sun, selecting materials with favorable thermal mass or light dispersing properties, and designing spaces that naturally circulate air.
  • butlerlex99 on 11 Mar 13
     
    The technologies of solar energy.
  • dextereli99 on 11 Mar 13
     
    the advantages of solar energy for the world 
nassiveradom00

U.S. geothermal infrastructure could support 7.2 million people | SmartPlanet - 0 views

www.smartplanet.com/...1318

current geothermal

shared by nassiveradom00 on 03 Nov 12 - No Cached
  • The geothermal energy process extracts heat from the Earth for the purpose of generating electricity to power homes. Most development in this area is concentrated at where tectonic plates meet, such as the western coasts of North and South America, the Mediterranean and east coast of Africa and East Asia.
  • The U.S. could have as much as 10 gigawatts of geothermal power at its disposal if current projects under development are completed, according to a new report.
  • U.S. geothermal infrastructure manages 3,100 megawatts, the new projects could add an additional 7,100 megawatts, or 7 gigawatts, of energy output.
  • dpurdy on 03 Nov 12
     
    "The U.S. could have as much as 10 gigawatts of geothermal power at its disposal if current projects under development are completed, according to a new report. According to a new report from the Geothermal Energy Association, there are 144 new geothermal projects in 14 U.S. states currently under development. While the current U.S. geothermal infrastructure manages 3,100 megawatts, the new projects could add an additional 7,100 megawatts, or 7 gigawatts, of energy output."
  • anonymous on 03 Oct 13
     
    Comprehensive up-to-date news coverage, aggregated from sources all over theworld by Google News.‎Finance - ‎About Google News - ‎Languages and regions - ‎Editors' Pickswww.killdo.de.ggNews Online from Australia and the World ...News headlines from Australia and the world. The latest national, world, business, sport, entertainment and technology news from News Limited news papers.www.killdo.de.ggBreaking News Updates | Latest News Headlines ...Breaking News, Latest News and Current News from FOXNews.com. Breakingnews and video. Latest Current News: U.S., World, Entertainment, Health, ...www.killdo.de.gg
westkea00

Energy Basics: Wave Energy - 0 views

www.eere.energy.gov/...wave_energy.html

shared by westkea00 on 12 Mar 13 - No Cached
  • Offshore Systems Offshore systems are situated in deep water, typically of more than 131 feet (40 meters). Sophisticated mechanisms—such as the Salter Duck—use the bobbing motion of the waves to power a pump that creates electricity. Other offshore devices use hoses connected to floats that ride the waves. The rise and fall of the float stretches and relaxes the hose, which pressurizes the water, which, in turn, rotates a turbine. Specially built seagoing vessels can also capture the energy of offshore waves. These floating platforms create electricity by funneling waves through internal turbines and then back into the sea. Onshore Systems Built along shorelines, onshore wave power systems extract the energy of breaking waves. Onshore system technologies include: Oscillating Water Columns: Oscillating water columns consist of a partially submerged concrete or steel structure that has an opening to the sea below the waterline. It encloses a column of air above a column of water. As waves enter the air column, they cause the water column to rise and fall. This alternately compresses and depressurizes the air column. As the wave retreats, the air is drawn back through the turbine as a result of the reduced air pressure on the ocean side of the turbine. Tapchans: Tapchans, or tapered channel systems, consist of a tapered channel that feeds into a reservoir constructed on cliffs above sea level. The narrowing of the channel causes the waves to increase in height as they move toward the cliff face. The waves spill over the walls of the channel into the reservoir, and the stored water is then fed through a turbine. Pendulor Devices: Pendulor wave-power devices consist of a rectangular box that is open to the sea at one end. A flap is hinged over the opening, and the action of the waves causes the flap to swing back and forth. The motion powers a hydraulic pump and a generator.
  • Wave energy technologies extract energy directly from surface waves or from pressure fluctuations below the surface. Renewable energy analysts believe there is enough energy in ocean waves to provide up to 2 terawatts of electricity. (A terawatt is equal to a trillion watts.)
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."
westkea00

Ocean Wave Energy Power Technology - History - 0 views

clean-future.com/...wave-power

shared by westkea00 on 06 Apr 13 - No Cached
  • Currently, numerous wave power plants (so called wave farms) have been implemented throughout the world. Many different organizations have designed various wave power systems that differ in size, cost, and effectiveness. A wave farm is a collection of wave power systems in order to create mass quantities of power. One example of a wave power plant is the Aguçadoura Wave Farm in Portugal from Pelamis Wave Power Ltd. It is the first wave farm ever established and produces 2.25 megawatts of power. It was completed in 2008. Other wave farms, with other companies involved, have been proposed.
  • In contrast to tidal power, ocean wave energy plants do not make use of the energy difference between high tide and low tide, but generating energy from continuous wave motion. So, wave energy generation is the conversion of the forces from the motion of waves into usable energy.
  • Wave energy is considered a form of hydropower, although it is the wind blowing over the surface of the ocean causing waves. So in many ways, wave energy is also wind energy - with all the pros and cons.
  • ...3 more annotations...
  • Wave energy is about using the energy of ocean waves for producing electrical current. It is a renewable energy resource and often confused with Tidal Power.
  • Wave power generation has been tested over the past century as an alternative energy source to fossil fuels to create electrical power, sea water desalinization, and reservoir pumping. Unfortunately, despite of all examinations and tests, the price for generating energy from ocean waves is still about twice as high as that of wind energy. Companies involved in wave energy generation hope to be able to cut 50% of the costs within the next couple of years.
  • During the 1970's gasoline crisis, wave power was pushed in order to be a good long term energy solution. Later, the energy crisis was resolved yet the leaps and bounds made in the innovation of wave power remained. Though there were not many wave power plants actually implemented, it has proven to be a benefit to modern resolutions with current power crises. Fuel prices are rising exponentially and the greenhouse effect is having potentially disastrous effects on the environment. There has never been more need for alternatives to fossil generated energy.
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