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tuckeremi99

Is Current Wind Growth Sustainable? | Renewable Energy World Magazine Article - 0 views

www.renewableenergyworld.com/...the-big-question1

wind sustainable

shared by tuckeremi99 on 22 Oct 12 - No Cached
  • wind farms are not only capital intensive but also have a long gestation period – could prove to be prohibitive for many potential investors.
  • terms of global policy, governments need to boost investments in onshore and offshore wind generation through the right mix of supportive policies and incentives.
  • wind energy will become even more attractive as it serves as an insurance against future increases in fuel and carbon prices, while reducing our dependency on fossil fuels imported from volatile regions.
  • ...17 more annotations...
  • Both in Europe and in the US, some 40% of all new power generating capacity installed in the past two years was wind energy. If the economic crisis continues, however, the reduction in power demand will start to impact wind energy, simply because of lower demand for new power plants. Nevertheless, the medium and long-term outlook remains very healthy, as political momentum is building towards a low carbon economy, without which humankind will not overcome three of the biggest concerns of our time – climate protection, energy security and the provision of jobs.
  • Wind power’s credentials as a rapidly deployable clean technology have put it at the forefront in the fight against climate change. Neither new nuclear capacity or carbon capture and storage (CCS) will contribute to CO2 reductions within the timeframe that the climate scientists give us. As a no-fuel, no-carbon emissions source of electricity, wind energy will play a big part in reducing carbon emissions before 2020.
  • A key element for policy makers is to dramatically improve competition in power markets, to ensure that investors, rather than consumers, are exposed to
  • The growth in wind power capacity has shown no signs of slowing, even in these tough economic times. For two years running there has been more new wind power capacity installed than any other power generating technology in Europe – including coal, gas and nuclear. In 2009 the European market for wind turbines experienced a 23% growth rate, the same as the average growth rate over the last 15 years.
  • future carbon and fuel price risk.
  • Wind power is a leader now, and will remain so in the future, attracting big investments and creating jobs. There is a boom waiting to happen in offshore wind energy. But, Europe’s ageing electricity grids must be upgraded and extended, and the EU must also pursue a drive to build an offshore grid in the North and Baltic seas that will connect offshore wind farms to the shore, piping vast amounts of CO2-free energy to consumers at affordable prices.
  • cleaner energy
  • he fact that wind is the most cost effective and scalable renewable source of energy.
  • past several years.
  • dynamic growth rate of the
  • Because of the small size of the existing installed base, the offshore wind sector will see higher growth percentages while the number of onshore turbines will continue to outpace those installed offshore.
  • Continued investment in grid infrastructure is critical for growth as well as wind turbine technology investments that improve efficiency and reliability while driving down emissions. Countries with the most efficient and flexible permitting processes will benefit by realizing the installation of the most advanced technology.
  • but renewable sources, and in large part, wind energy, have an extremely important role to play.
  • A fundamental value of wind is that it lowers risk in the overall generation mix by bringing in a fixed electricity cost. You don’t have any fuel risk, so you don’t have these big price spikes that you see when you generate electricity from gas or oil.
  • The wind power market is still intact. Demand for ‘green’ power stations remains unabated and nearly all governments have adopted policies aimed at environmental sustainability.
  • As our industry is still very young, wind power currently contributes only around 1.5% to global electricity supplies.
  • this merely serves to highlight the enormous potential for the future, especially as wind power is not only clean but also inexpensive. This is something that more and more governments and energy companies are realizing.
  • tuckeremi99 on 22 Oct 12
     
    "The growth in wind power capacity has shown no signs of slowing, even in these tough economic times. For two years running there has been more new wind power capacity installed than any other power generating technology in Europe - including coal, gas and nuclear. In 2009 the European market for wind turbines experienced a 23% growth rate, the same as the average growth rate over the last 15 years."Both in Europe and in the US, some 40% of all new power generating capacity installed in the past two years was wind energy. If the economic crisis continues, however, the reduction in power demand will start to impact wind energy, simply because of lower demand for new power plants. Nevertheless, the medium and long-term outlook remains very healthy, as political momentum is building towards a low carbon economy, without which humankind will not overcome three of the biggest concerns of our time - climate protection, energy security and the provision of jobs." "Wind power is a leader now, and will remain so in the future, attracting big investments and creating jobs. There is a boom waiting to happen in offshore wind energy. But, Europe's ageing electricity grids must be upgraded and extended, and the EU must also pursue a drive to build an offshore grid in the North and Baltic seas that will connect offshore wind farms to the shore, piping vast amounts of CO2-free energy to consumers at affordable prices."
jack wells

The Benefits of Wind Power - Green Living Ideas - 0 views

greenlivingideas.com/...the-benefits-of-wind-power

wind benefits

shared by jack wells on 11 Mar 13 - No Cached
  • One of the most important is that wind power is the least expensive of all other forms of alternative energy.
  • One of the most important is that wind power is the least expensive of all other forms of alternative energy. 
  • Another tremendous benefit of wind power is that it is a sustainable source of energy and a clean source of energy
  • ...2 more annotations...
  • Wind energy is also a renewable energy, meaning it does not deplete our natural resources like coal or petroleum based products.
  • 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 11 Mar 13
     
    The benefits of wind energy.
stewartlas97

Wind - 0 views

www.esru.strath.ac.uk/...wind.htm

shared by stewartlas97 on 13 Mar 13 - No Cached
  • stewartlas97 on 13 Mar 13
     
    "This movement is complicated by several other factors that means wind does not always flow from the equator in the direction of either pole. The rotation of the earth creates a force known as the Coriolis force and this factor along with the temperature differences create winds at high altitudes above the earth on a large scale. These Geostrophic winds play a part in the wind's that affect us in everyday life, but local winds are largely affected by the surface of the earth - which is neither uniform or smooth. The earth has large flat plains (desert regions), areas covered with plant life (rainforests), very uneven regions (mountain ranges) and very smooth regions (seas and oceans), all of which affect the wind near the surface of the earth to varying degrees. These areas of the earth all have different values of roughness, which can impeded the flow of air. Obviously the lower the value of roughness the less the air is impeded."
sokolkyl00

Solar power - Sustainable green energy to protect our economy and environment | PARTHA ... - 2 views

saferenvironment.wordpress.com/...ct-our-economy-and-environment

solar sustainable

shared by sokolkyl00 on 11 Mar 13 - No Cached
  • A Solar Energy system can operate entirely independently, not requiring a connection to a power or gas grid at all. Systems can therefore be installed in remote locations, making it more practical and cost-effective than the supply of utility electricity to a new site.
  • A Solar Energy system can operate entirely independently, not requiring a connection to a power or gas grid at all. Systems can therefore be installed in remote locations, making it more practical and cost-effective than the supply of utility electricity to a new site.
  • bolendev99 on 11 Mar 13
     
    "It offers much more self-reliance than depending upon a power utility for all electricity."
ricciardellinick

Energy Studies - How Fuel Cell Works - 2 views

intraweb.stockton.edu/...page.cfm

energy fuel cell fuel cell form

shared by ricciardellinick on 12 Mar 13 - No Cached
  • Hydrogen is the simplest of all elements with one electron and one proton. Two hydrogen atoms form one hydrogen gas molecule, or H2, but this gas is rarely found in large quantities in nature. Hydrogen’s chemical properties allow it to combine easily with other elements to form other molecules.
  • ricciardellinick on 12 Mar 13
     
    "Hydrogen is the simplest of all elements with one electron and one proton. Two hydrogen atoms form one hydrogen gas molecule, or H2, but this gas is rarely found in large quantities in nature. Hydrogen's chemical properties allow it to combine easily with other elements to form other molecules"
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."
aaronschr00

Where does Wind Energy Come From? - 1 views

www.motiva.fi/...index.htm

wind history

shared by aaronschr00 on 08 Mar 13 - No Cached
  • All renewable energy (except tidal and geothermal power), and even the energy in fossil fuels, ultimately comes from the sun. The sun radiates 174,423,000,000,000 kilowatt hours of energy to the earth per hour.
  • The sun radiates 174,423,000,000,000 kilowatt hours of energy to the earth per hour.
  • freeberntay99 on 08 Mar 13
     
    " Where does Wind Energy come From? All renewable energy (except tidal and geothermal power), and even the energy in fossil fuels, ultimately comes from the sun. The sun radiates 174,423,000,000,000 kilowatt hours of energy to the earth per hour. In other words, the earth receives 1.74 x 10 17 watts of power . 1) About 1 to 2 per cent of the energy coming from the sun is converted into wind energy. That is about 50 to 100 times more than the energy converted into biomass by all plants on earth. 2)"
pettitmat99

2 studies conclude that biofuels are not so green after all - The New York Times - 0 views

www.nytimes.com/...07iht-biofuel.5.9849073.html

pollution

shared by pettitmat99 on 22 Oct 12 - No Cached
  • most all biofuels used today cause more greenhouse gas emissions than conventional fuels if the pollution caused by producing these "green" fuels is taken into account, two studies published Thursday have concluded.
  • The benefits of biofuels have come under increasing attack in recent months as scientists have evaluated the global environmental cost of their production. The new studies, published by the journal Science, are likely to add to the controversy.
  • When you take this into account, most of the biofuel that people are using or planning to use would probably increase greenhouse gasses substantially," sai
  • ...5 more annotations...
  • t even that equation proved overly simplistic because the process of turning plants into fuel causes it own emissions - through refining and transport, for example
  • If vegetable oil prices go up globally, as they have because of increased demand for biofuel crops, new land is inevitably cleared as farmers in developing countries switch production. Crops from old plantations and fields go to Europe for biofuels, but new fields and plantations are created to feed people at home.
    • pettitmat99
      pettitmat99 on 22 Oct 12
       
      GR8 info on pollution of biofuels
  • ut the new studies suggested that when land use is taken into account few, if any biofuels, will be acceptable.
  • d: "If the whole point of biofuels directives was to reduce greenhouse gas emissions, we've found out that most biofuels are not really better than conventional fuels at that."
Connor Wiggins

Fuel Cells Information, Fuel Cells Facts, Fuel Cells Technology - National Geographic - 0 views

environment.nationalgeographic.com/...fuel-cell-profile

fuel cell form

shared by Connor Wiggins on 22 Oct 12 - No Cached
  • A fuel cell is a device that uses a source of fuel, such as hydrogen, and an oxidant to create electricity from an electrochemical process.
  • Most fuel cells in use today, however, use hydrogen and oxygen as the chemicals.
  • Although hydrogen is the most abundant element in the universe, it is difficult to store and distribute. Canisters of pure hydrogen are readily available from hydrogen producers, but as of now, you can't just fill up with hydrogen at a local gas station.
  • ...2 more annotations...
  • All fuel cells have the same basic configuration; an electrolyte and two electrodes. But there are different types of fuel cells, based mainly on what kind of electrolyte they use.
  • All fuel cells have the same basic configuration; an electrolyte and two electrodes. But there are different types of fuel cells, based mainly on what kind of electrolyte they use.
  • carrowluk99 on 29 Oct 12
     
    According to many experts, we may soon find ourselves using fuel cells to generate electrical power for all sorts of devices we use every day
dpurdy

Fuel Cells 2000 : Fuel Cell Basics : Applications - 0 views

www.fuelcells.org/...apps.html

hydrogen current use

shared by dpurdy on 15 Mar 12 - Cached
  • There are many uses for fuel cells — right now, all of the major automakers are working to commercialize a fuel cell car. Fuel cells are powering buses, boats, trains, planes, scooters, forklifts, even bicycles. There are fuel cell-powered vending machines, vacuum cleaners and highway road signs. Miniature fuel cells for cellular phones, laptop computers and portable electronics are on their way to market. Hospitals, credit card centers, police stations, and banks are all using fuel cells to provide power to their facilities. Wastewater treatment plants and landfills are using fuel cells to convert the methane gas they produce into electricity. Telecommunications companies are installing fuel cells at cell phone, radio and 911 towers. The possibilities are endless.
  • Stationary
  • More than 2500 fuel cell systems have been installed all over the world
  • ...2 more annotations...
  • Telecommunications
  • Landfills/Wastewater Treatment Plants/Breweries/Wineries-
  • dpurdy on 15 Mar 12
     
    Current Applications for fuel Cells
crandallchr98

Fuel Cell Markets - Advantages & Benefits of Fuel Cell & Hydrogen Technologies - 2 views

www.fuelcellmarkets.com/...5,1,1,663.html

what pollution hydrogen wind how cost potential location sustainable future

shared by crandallchr98 on 03 Nov 11 - Cached
  • Advantages by Application Telecoms CHP Fuel Cell Generators Electric Vehicles - APU's and Range Extenders Fuel Cell Forklifts Marine Power Portable Power
  • Low Emissions – Using hydrogen, PEM fuel cells only emit water at the point of use. Even when using hydrocarbon fuels, fuel cells emit considerably less emissions than other combustion based technologies, this is for two reasons. Firstly their higher efficiency means they require less fuel to generate the same energy and secondly because there is no combustion, there are negligible NOx or SOx emissions and no particulate emissions.
  • Reliability & Maintenance – The only moving parts in fuel cells are involved with water, heat and air management (pumps, blowers, compressors). When compared to internal combustion engines, there are considerably less moving parts and these require less maintenance (no oil changes every 150 hours). Less maintenance means less site visits or trips to the garage and reduced operating costs. Fuel cells can be monitored remotely and any problems dealt with quickly.
  • ...2 more annotations...
  • Few moving parts means all you will ever hear of a fuel cell is either a compressor, blower or pump
  • Hydrogen is the lightest of all gases and disperses very quickly, it is also non-polluting and hazardous to the surrounding environment (unlike gasoline a spillage / leak will not cause an environmental disaster). Hydrogen, like natural gas and petrol, is a fuel and will burn when ignited. Hydrogen is only explosive when it is able to build up in a enclosed space, which is very difficult as it has a habit of escaping (hydrogen is the smallest of all elements). As long as appropriate safety procedures are followed, as they should with any fuel, hydrogen is a safe fuel.
  • crandallchr98 on 15 Mar 12
     
    Advantages & Benefits of Hydrogen and Fuel Cell Technologies High Efficiency - Like generators and other engines, fuel cells are energy conversion devices - they convert stored energy within a fuel into usable energy. A fuel cell uses an electrochemical reaction to extract energy directly in the form of heat and electricity, both of which can be utilised at the point of generation.
sankeyrya00

Wind Turbines - Kinetic wind energy generator technology - 0 views

www.alternative-energy-news.info/...wind-turbines

wind turbines energy technology history current sustainable

shared by sankeyrya00 on 23 Sep 13 - No Cached
  • Though our scientists may claim that they are inventing something new by using wind as a source of generating energy, the truth is that wind is being used for centuries for this purpose. An example of this is an article published in 1838, which clearly shows that even in those times, wind was considered an important source of energy. Here are a few quotes that were recorded in the past, which prove that wind was always important in generating energy
  • Renewable energy production and demand growth is gaining momentum in many ways across the world. There is a booming demand of wind power today and all wind energy equipment manufacturers are gearing up to meet the demand and take advantage of it. Wind power capacity growth will be reaching 447GW in the next five years and by year 2014 end, Asia will lead the world in installed wind capacity.
  • Yes, the day is not far off when reaching for sky is the new motto for generating cost-effective renewable energy. Initially it was considered to be technically non-viable to tap high-altitude winds. But today, technically-advanced materials and innovative computer know-how are giving new life to this scheme with innovative autonomous aerial structures using wind energy to generate power
  • ...6 more annotations...
  • It's an expert estimation that the total energy stored in wind is 100 times higher than actually needed by humans on this earth. The catch is that we have to learn and devise ways to trap this wind power blowing across the planet earth. Experts tell us one more thing that most of the wind energy is available at high altitude and we can’t manufacture turbines of that height. So we have to think of new ways to trap that wind power blowing at a significant height. Some experts estimate that the total energy contained in wind is 100 times the amount needed by everyone on the planet. However, most of this energy is at high altitudes, far beyond the reach of any wind turbine.
  • A research company in New Hampshire recently patented its bladeless wind turbine, which is based on a patent issued to Nikola Tesla in 1913. This wind turbine is christened as the Fuller Wind Turbine. This turbine is developed by Solar Aero. The specialty of Fuller Wind Turbine is it has only one rotating part, known as the turbine-driveshaft. The entire machinery is assembled inside a housing. Wind turbines are often disliked by environmentalists because they kill birds and bats and often generate noise for the residents living nearby
  • Presently Fluid Dynamics Expert, John Dabiri, is very much on the quest of improving designs of wind turbines. Spotting behaviours that may throw light on energy-related practices in biological system and trying to implement that in real-life situations is part of that quest and Mr.Dabiri is jubilant that he is learning lessons from a school of fish! Water-energy, and wind energy are both studied.
  • GE, the US industrial group, is promoting and showing confidence in offshore wind technology by buying ScanWind, which makes direct-drive turbine components. This move will help in generating thousands of new jobs in the field of designing and manufacturing turbines. This move will affirm the confidence of investors in the fledgling offshore wind industry, which has been weighed down by concerns about costs and reliability. GE is moving ahead with establishing turbine manufacturing facilities to serve the European markets at first. They have to make up their mind about the size of the investment and location
  • The Metropolis Magazine has been holding Next Generation Design Competition since 2003. They want to provide a platform for young designers to promote the spirit of activism, social involvement, and entrepreneurship. They offer prize money of $ 10,000. But the real attraction is the publicity given to the projects of winners and runners-up. This recognition helps abstract ideas take concrete forms. For 2009, the theme for the Next Generation Design Competition was: How do we fix our energy addiction? They offered some guidelines, "Think about how we live and work, what we use, how we get where we need to go, hidden costs to our pocket books and the environment, across the whole design spectrum. Focus on one area that needs fixing—products, interiors, buildings and landscape, communication systems, or anything else you can imagine—and develop your idea fully. And above all, think of our energy addiction as a design problem at all scales."
  • sector. Wind turbines generate clean and green power for us but they have certain precondition. One of it is the power unit has to be set up in strong wind area. But Green Energy Technologies has developed a brand new wind power generator known as the WindCube. It is smaller compared to the normal wind generator. WindCube is specially designed to set up on the roof of a building in urban and rural areas. WindCube carries a 22 x 22 x 12 feet framework and its single unit can produce a maximum of 60kW of power
brownale99

How much more expensive is solar energy than fossil fuels - 0 views

wiki.answers.com/...solar_energy_than_fossil_fuels

geothermal cost

shared by brownale99 on 13 Mar 13 - No Cached
  • brownale99 on 13 Mar 13
     
    "Fossil fuel power stations typically cost about $2.1 dollars per watt to build solar stations around $7 at present. The efficiency is increasing and costs are falling. This of course does not represent the cost to the consumer. In addition it does not take into account all the various other costs and the advantages and disadvantages of each. Fuel (fossil stations), poor sunlight (solar stations). Maintenance costs are similar for single plants but solar stations do not have the capacity of fossil fuel stations."
hayespay99

How long have people been using solar energy - 1 views

wiki.answers.com/...people_been_using_solar_energy

solar history convert form energy

shared by hayespay99 on 12 Mar 13 - No Cached
  • It depends what you mean by "solar energy." Humans have always used solar energy in some sense: to warm themselves, to grow food, etc. However, I'm assuming that's not really what you mean (although it is important to realize that all energy on earth, with the exception of nuclear fission and geothermal, is ultimately driven by the sun's energy -- even fossil fuels, which after all were plants that grew with sunlight millions of years ago). Solar power has been used directly in various forms for over 100 years.
carusonepay99

How sustainable is wind power? | OregonLive.com - 0 views

blog.oregonlive.com/...sustainable_is_wind_power.html

wind sustainable

shared by carusonepay99 on 08 Mar 13 - No Cached
  • When looking at a wind powered electric generator, many people see a permanent source of renewable electricity. The problem with this image is that wind generators have shorter life spans than the term “sustainable” would imply. Wooden windmills in Holland that used to power industrial machinery before the invention of steam engines were more durable than these picket lines of propellers along our Columbia Gorge. The composite material and rare earth chemicals they require are both perishable and costly to replace. More important, like fossil fuels, our planet has a finite supply of these materials. Wind power is such an inefficient means of generating electricity that a world that seriously relied on it the way we do fossil fuels would run out of the limited resources needed to build and maintain them long before our present trends would exhaust our vast bounty of hydrocarbons.
  • carusonepay99 on 08 Mar 13
     
    "The first hard core environmentalist I ever encountered in life taught my 8th grade energy class at Estacada Junior High, a course that President Carter's brand new Department of Education had mandated upon us a decade before as a symbolic gesture to show he cared about America's energy future. Despite an overall policy of separating church and state, in this class it was the gospel that we would deplete all fossil fuels by the year 2000. Back when "2000" was preceded by "THE YEAR" it seemed so far away didn't it? The only lasting lesson this course taught me was a healthy skepticism of government mandated indoctrination."
rascoekat00

Energy Basics: Tidal Energy - 1 views

www.eere.energy.gov/...tidal_energy.html

tidal current

shared by rascoekat00 on 08 Mar 13 - No Cached
  • Tidal turbines look like wind turbines. They are arrayed underwater in rows, as in some wind farms. The turbines function best where coastal currents run between 3.6 and 4.9 knots (4 and 5.5 mph). In currents of that speed, a 49.2-foot (15-meter) diameter tidal turbine can generate as much energy as a 197-foot (60-meter) diameter wind turbine. Ideal locations for tidal turbine farms are close to shore in water 65.5–98.5 feet (20–30 meters) deep
  • In currents of that speed, a 49.2-foot (15-meter) diameter tidal turbine can generate as much energy as a 197-foot (60-meter) diameter wind turbine. Ideal locations for tidal turbine farms are close to shore in water 65.5–98.5 feet (20–30 meters) deep.
  • A barrage or dam is typically used to convert tidal energy into electricity by forcing water through turbines, which activate a generato
  • ...3 more annotations...
  • Some of the oldest ocean energy technologies use tidal power. All coastal areas experience two high tides and two low tides over a period of slightly more than 24 hours. For those tidal differences to be harnessed into electricity, the difference between high and low tides must be more than 16 feet (or at least 5 meters). However, there are only about 40 sites on Earth with tidal ranges of this magnitude.
  • Tidal Turbines Tidal turbines look like wind turbines. They are arrayed underwater in rows, as in some wind farms. The turbines function best where coastal currents run between 3.6 and 4.9 knots (4 and 5.5 mph). In currents of that speed, a 49.2-foot (15-meter) diameter tidal turbine can generate as much energy as a 197-foot (60-meter) diameter wind turbine. Ideal locations for tidal turbine farms are close to shore in water 65.5–98.5 feet (20–30 meters) deep.
  • Currently, there are no tidal power plants in the United States, but conditions are good for tidal power generation in the Pacific Northwest and the Atlantic Northeast regions.
  • albrechtjen99 on 08 Mar 13
     
    "Tidal Turbines Tidal turbines look like wind turbines. They are arrayed underwater in rows, as in some wind farms. The turbines function best where coastal currents run between 3.6 and 4.9 knots (4 and 5.5 mph). In currents of that speed, a 49.2-foot (15-meter) diameter tidal turbine can generate as much energy as a 197-foot (60-meter) diameter wind turbine. Ideal locations for tidal turbine farms are close to shore in water 65.5-98.5 feet (20-30 meters) deep."
  • kramerjac99 on 11 Mar 13
     
    where its used
  • butlerlei98 on 12 Mar 13
     
    "Some of the oldest ocean energy technologies use tidal power. All coastal areas experience two high tides and two low tides over a period of slightly more than 24 hours. For those tidal differences to be harnessed into electricity, the difference between high and low tides must be more than 16 feet (or at least 5 meters). However, there are only about 40 sites on Earth with tidal ranges of this magnitude."
dpurdy

EIA Energy Kids - Geothermal - 1 views

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

geothermal form

shared by dpurdy on 08 Mar 13 - No Cached
  • dpurdy on 08 Mar 13
     
    "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."
bakereli00

Global Warming and Climate Change | Greenpeace - 0 views

www.greenpeace.org/...global-warming-and-energy

geothermal solar wind history global warming climate change greenpeace

shared by bakereli00 on 08 Mar 13 - No Cached
  • Research has shown that with current technology, renewable energy sources like wind, solar, and geo-thermal can provide almost all of our primary energy demand.
  • brownale99 on 08 Mar 13
     
    "The Solutions With current technology, renewable energy sources like wind, solar, and geothermal can provide 96% of our electricity and 98% of our total heating demand - accounting for almost all of our primary energy demand."
sconzomic99

What is tidal energy - How tidal works? - Tidal energy - 0 views

www.solarpowernotes.com/...tidal-energy.html

tide energy cost sustainable

shared by sconzomic99 on 11 Mar 13 - Cached
  • tidal energy uses tidal strength of water and back and forth movement  in seas, rivers or oceans. Tidal power exploits kinetic energy of water that power water turbines with its movement between the wings which rotate the turbine to produce electricity.
  • For producing significant amount of energy out of tidal water turbines, range of tides should be high and substantial amount of water should be there for pushing water through the turbine.
  • It is significantly important to spot the appropriate place which provide suitable and sustainable conditions to produce tidal energy, there are plenty of places around the globe which provide good conditions for installing water turbines and then produce electricity use tidal power of oceans in the location.
  • ...5 more annotations...
  • Once tidal power plant is built its’ electricity is free. It does not emit greenhouse gasses, carbon emission gasses which pollute environment. It does not have any dependency of any fossil fuel including furnace oil, gasses, etc; it needs no oil what so ever to produce electricity. Tidal power technology is renewable energy, which uses tidal and waves of same water for producing electricity over and over again. Tidal power technology like all renewable energy is clean energy and does not leave much impact on environment. Tidal power plants does not require much maintenance, therefore it is maintenance cost free. Tidal energy stations have about 80 % efficiency ratio, where as fossil fuel have approximately 30 % for efficiency levels. Tides in oceans are very predictable, its easy to judge when strong tides are going to show up from water consider weather and other conditions. The better tides and wave strengths of the oceans is, improved the efficiency of the station is. Electricity does not fluctuate on large scale using tidal energy as it happens in solar power technology.
  • Electricity can only be produced when tides are high in the sea, once ocean is calm and does not flow certain level of waves, it cannot produce electricity. Therefore electricity can be produced for only 10 hrs a day in presence of tides.
  • Tidal power plants are not cost effective. Millions of dollars are utilized for developing tidal power which could provide electricity in Megawatts.
  • Once tidal power plant is built its’ electricity is free. It does not emit greenhouse gasses, carbon emission gasses which pollute environment. It does not have any dependency of any fossil fuel including furnace oil, gasses, etc; it needs no oil what so ever to produce electricity. Tidal power technology is renewable energy, which uses tidal and waves of same water for producing electricity over and over again. Tidal power technology like all renewable energy is clean energy and does not leave much impact on environment. Tidal power plants does not require much maintenance, therefore it is maintenance cost free. Tidal energy stations have about 80 % efficiency ratio, where as fossil fuel have approximately 30 % for efficiency levels. Tides in oceans are very predictable, its easy to judge when strong tides are going to show up from water consider weather and other conditions. The better tides and wave strengths of the oceans is, improved the efficiency of the station is. Electricity does not fluctuate on large scale using tidal energy as it happens in solar power technology.
  • not appropriate to risk £15 millions worth of money. This is the main reason why this project is yet start
conwayjam99

Wind Energy, Noise Pollution - Robert Bryce - National Review Online - 0 views

www.nationalreview.com/...y-noise-pollution-robert-bryce

pollution wind

shared by conwayjam99 on 20 Mar 13 - No Cached
  • “headaches, ear pain, nausea, blurred vision, anxiety, memory loss,
  • conwayjam99 on 20 Mar 13
     
    "headaches, ear pain, nausea, blurred vision, anxiety, memory loss, are all symptoms from the noise of wind turbines 
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