Skip to main content

Home/ Groups/ qmstech2
Rss Feed
Sort By: Most Recent | Popular Filter: All | Bookmarks | Topics Simple Middle
2More

Tidal stream power - Simple English Wikipedia, the free encyclopedia - 0 views

simple.wikipedia.org/...Tidal_stream_power tide convert
shared by lemairenat98 on 11 Mar 13 - No Cached
  • Tidal stream systems need to be located in areas with fast currents where natural flows are concentrated between obstructions, for example at the entrances to bays and rivers, around rocky points, headlands, or between islands or other land masses.
  • lemairenat98 on 11 Mar 13
     
    "Tidal stream systems need to be located in areas with fast currents where natural flows are concentrated between obstructions, for example at the entrances to bays and rivers, around rocky points, headlands, or between islands or other land masses."
7More

Five Reasons Why Tidal Energy is the Wave of the Future - Green Living Ideas - 3 views

greenlivingideas.com/...ergy-is-the-wave-of-the-future tide future co2 pollution
shared by rodriguezjos99 on 11 Mar 13 - No Cached
  • Green energy has never been more important than it is today with the looming threat of global warming. Every possible effort must be made to reverse the worldwide threat of climate change by subsidizing and switching to green energy. One often-overlooked source of clean, renewable energy comes not from solar, wind or geothermal power, but from the tides.
  • Tidal Energy is valuable to environmentalists because unlike fossil fuels the source of energy will not be depleted in the foreseeable future no matter how much energy is collected.
  • The collection of tidal energy is clean because it involves very little emission of carbon dioxide and other greenhouse gases
  • ...3 more annotations...
  • The pattern of tides is extremely stable and not strongly affected by weather conditions which suggests that it would be a very stable source of green energy.
  • Moving water can exert a much greater force on a turbine than wind which means the turbine can turn slowly and still produce a great deal of electricity. The slow and stable tidal forces are ideal parameters for engineering energy solutions. The fact that the turbines can be slow-moving makes it easier to avoid interfering with local ecosystems
  • While the initial cost of building tidal energy plants is high, the plants are expected to run for a very long time which will make them more cost-effective in the long run
  • rodriguezjos99 on 13 Mar 13
     
    "Five Reasons Why Tidal Energy is the Wave of the Future JANUARY 4, 2013 BY GUEST CONTRIBUTOR LEAVE A COMMENT Join GLI's 10,000 other followers on Twitter! Green energy has never been more important than it is today with the looming threat of global warming. Every possible effort must be made to reverse the worldwide threat of climate change by subsidizing and switching to green energy. One often-overlooked source of clean, renewable energy comes not from solar, wind or geothermal power, but from the tides. 1. Tidal Energy is Renewable Tidal Energy is valuable to environmentalists because unlike fossil fuels the source of energy will not be depleted in the foreseeable future no matter how much energy is collected. The gravitational relationship between the Earth and the moon is extremely stable in the long term just like solar, wind and geothermal energy. 2. Tidal Energy is Green The collection of tidal energy is clean because it involves very little emission of carbon dioxide and other greenhouse gases. However, the marine ecosystem is fragile and great care must be taken to avoid interfering with the lives of organisms that depend on the tide."
4More

Tidal power - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Tidal_energy tide sustainable
shared by warneraus98 on 11 Mar 13 - Cached
  • idal power is taken from the Earth's oceanic tides; tidal forces are periodic variations in gravitational attraction exerted by celestial bodies. These forces create corresponding motions or currents in the world's oceans
  • Because the Earth's tides are ultimately due to gravitational interaction with the Moon and Sun and the Earth's rotation, tidal power is practically inexhaustible and classified as a renewable energy resource
  • Because the Earth's tides are ultimately due to gravitational interaction with the Moon and Sun and the Earth's rotation, tidal power is practically inexhaustible and classified as a renewable energy resource
  • warneraus98 on 11 Mar 13
     
    ware tide energy comes from     
1More

What is the sustainability of solar energy? - Yahoo! Answers - 2 views

answers.yahoo.com/...index solar energy yahoo answers sustainable
shared by dextereli99 on 11 Mar 13 - No Cached
  • The will burn for billions of years, it won't run out any time soon. This is sustainable because it will not deplete in the near future. The harder question is if the materials that go into a solar cell are sustainable. They use primarily silicon, which is one of the most abundant materials on earth. But they can also use other things, like metals (copper, silver, gold), and some toxic chemicals (arsenic, cadmium) etc. The sustainability of these materials is questionable. These materials are recyclable, and it is thought 99% of a solar cell can be recycled. But the production of them does has some toxic site affects, which means we have to balance the 'clean' energy production of the cells with the bad by products of their manufacturing process.
2More

Aquamarine Power - Why wave power? The potential to capture clean sustainable energy fr... - 2 views

www.aquamarinepower.com/...why-wave-power wave sustainable
shared by millingtoneli99 on 11 Mar 13 - No Cached
  • Ocean waves are generated by wind passing over the surface of the sea - a process which often begins many hundreds or thousands of miles from shore.
  • rodriguezjos99 on 11 Mar 13
     
    "Ocean waves represent our planet's last untapped natural renewable energy resource.  Over 70 per cent of the earth's surface is covered with water.  The energy contained within waves has the potential to produce up to 80,000TWh of electricity per year - sufficient to meet our global energy demand five times over. The potential to capture energy from the sea offers a vast and endless source of clean sustainable electricity."
10More

Wind Power Information, Wind Power Facts - National Geographic - 1 views

environment.nationalgeographic.com/...wind-power-profile wind form
shared by bishophan00 on 11 Mar 13 - No Cached
  • Wind is a clean source of renewable energy that produces no air or water pollution.
  • Wind is the movement of air from an area of high pressure to an area of low pressure. In fact, wind exists because the sun unevenly heats the surface of the Earth. As hot air rises, cooler air moves in to fill the void. As long as the sun shines, the wind will blow. And as long as the wind blows, people will harness it to power their lives.
  • The wind spins the blades, which turn a shaft connected to a generator that produces electricity. Other turbines work the same way, but the turbine is on a vertical axis and the blades look like a giant egg beater.
  • ...5 more annotations...
  • At the end of last year, global capacity was more than 70,000 megawatts.
  • And since the wind is free, operational costs are nearly zero once a turbine is erected.
  • Globally, generation more than quadrupled between 2000 and 2006.
  • n the energy-hungry United States, a single megawatt is enough electricity to power about 250 homes.
  • ndustry experts predict that if this pace of growth continues, by 2050 the answer to one third of the world's electricity needs will be found blowing in the wind.
  • barnardnat99 on 11 Mar 13
     
    where wind energy come from
  • conwayjam99 on 13 Mar 13
     
    ". At the end of last year, global capacity was more than 70,000 megawatts. In the energy-hungry United States, a single megawatt is enough electricity to power about 250 homes. "
2More

Solar Energy - 0 views

www.solarenergy.com solar cost
shared by butlerlex99 on 11 Mar 13 - Cached
  • Today's solar product offerings go way beyond what most people think of when they hear the term 'solar power' or 'solar energy' – typically they imagine solar electric panels on a roof converting sunlight into electricity. While these 'photo voltaic' panels do represent a piece of the solar pie, many more solar-powered products and technologies utilizing the sun's energy now exist. One of the biggest is solar hot water, whether for residential or commercial the use of the sun's heat to warm a potable water supply instead of electricity is a very efficient method and truly cost-effective. Solar HVAC systems, battery-backed off-grid systems, solar farms and more are at the forefront of the solar power world innovations, with more to come. Add this site to your Favorites to keep up with all the latest developments.
  • butlerlex99 on 11 Mar 13
     
    solar products 
3More

Geothermal Energy | Center for Climate and Energy Solutions - 0 views

www.c2es.org/...geothermal geothermal co2
shared by glinbizzivic98 on 11 Mar 13 - No Cached
  • Table 1: Levelized cost of capital electricityInitial Capital InvestmentCost of Power (cents/kWh)*$2400 per KW3.99 - 5.76$2900 per KW4.40 – 6.54$3400 per KW4.81 – 7.33 
  • A price on carbon, such as that which would exist under a GHG cap-and-trade program, would raise the cost of electricity produced from fossil fuels relative to the cost of electricity from renewable sources, such as geothermal energy, and other lower-carbon technologies.
  • glinbizzivic98 on 12 Mar 13
     
    "Geothermal energy can be used for electricity generation, heat pumps, or direct uses. This document focuses only on the traditional, commercially available technologies that produce electricity by exploiting the naturally occurring heat of the earth. Enhanced geothermal systems, which utilize advanced (often experimental) drilling and fluid injection techniques to augment and expand the availability of geothermal resources, are the subject of a separate factsheet (see Climate TechBook: Enhanced Geothermal Systems)."
5More

How much power is generated in the United States by solar power? - 2 views

solar.calfinder.com/...how-much-power-2 current solar energy
shared by kenyonlau99 on 11 Mar 13 - No Cached
  • just over 843,000 kilowatt-hours of electricity were provided by solar power. The vast majority of that, more than 666,500 kWh, were produced in California. Roughly 14 percent of the total renewable energy generated in the U.S. in 2008 was solar energy. And remember that these numbers continue to grow each year. The solar industry has been growing on an average of 30-40 percent each year, and as the industry grows, so will the amount of clean, renewable power it puts out. Interested in Home Solar Energy? Fill in your details below and certified solar contractors will give you FREE estimates. What type of Solar Energy services are you interested in? * Please Select Solar Electrical Solar Thermal First Name * Last Name * Zipcode *
    • kenyonlau99
      kenyonlau99 on 13 Mar 13
       
      GOOD INFO!
  • The EIA states that just over 843,000 kilowatt-hours of electricity were provided by solar power. The vast majority of that, more than 666,500 kWh, were produced in California. Roughly 14 percent of the total renewable energy generated in the U.S. in 2008 was solar energy. And remember that these numbers continue to grow each year. The solar industry has been growing on an average of 30-40 percent each year, and as the industry grows, so will the amount of clean, renewable power it puts out.
  • whalenkil98 on 11 Mar 13
     
    how much solar energy is being converted in the USA?
  • kenyonlau99 on 13 Mar 13
     
    "How much power is generated in the United States by solar power? ted-vollgraff According to the Energy Information Administration (EIA), renewable energy accounted for 7 percent of U.S. energy consumption in 2008. Solar power accounted for only one percent. But, considering how much energy is consumed each year in the United States, that is still a decent bit of power. The EIA states that just over 843,000 kilowatt-hours of electricity were provided by solar power. The vast majority of that, more than 666,500 kWh, were produced in California. Roughly 14 percent of the total renewable energy generated in the U.S. in 2008 was solar energy. And remember that these numbers continue to grow each year. The solar industry has been growing on an average of 30-40 percent each year, and as the industry grows, so will the amount of clean, renewable power it puts out. "
1More

HowStuffWorks "Biofuels vs. Fossil Fuels" - 0 views

auto.howstuffworks.com/...biofuel-fossil-fuel1.htm biofuel
shared by rainwateremi99 on 11 Mar 13 - No Cached
  • The U.S. currently produces 9.2 billion gallons of ethanol a year and consumes 9.6 billion gallons.
1More

How long has the concept of tidal power been around? | GreenAnswers - 0 views

greenanswers.com/...oncept-tidal-power-been-around history
shared by adamsaub98 on 11 Mar 13 - No Cached
  • Mills using tidal power can be dated back to 12th century Europe,
1More

Energy Resources: Tidal power - 0 views

www.darvill.clara.net/...tidal.htm tide wave
shared by crandallmad00 on 11 Mar 13 - Cached
  • A huge dam (called a "barrage") is built across a river estuary. When the tide goes in and out, the water flows through tunnels in the dam. The ebb and flow of the tides can be used to turn a turbine, or it can be used to push air through a pipe, which then turns a turbine. Large lock gates, like the ones used on canals, allow ships to pass. If one was built across the Severn Estuary, the tides at Weston-super-Mare would not go out nearly as far - there'd be water to play in for most of the time. But the Severn Estuary carries sewage and other wastes from many places (e.g. Bristol & Gloucester) out to sea. A tidal barrage would mean that this stuff would hang around Weston-super-Mare an awful lot longer! Also, if you're one of the 80,000+ birds that feeds on the exposed mud flats when the tide goes out, then you have a problem, because the tide won't be going out properly any more.
1More

How does tidal energy generate electricity - 0 views

wiki.answers.com/...al_energy_generate_electricity convert
shared by adamsaub98 on 11 Mar 13 - No Cached
  • Tidal BarragesA tidal barrage is basically a huge dam that is built across a river or estuary. Tunnels are built throughout the dam, and when the tide rises and falls it turns a turbine that generates power. Tidal FencesTidal fences are giant turnstiles that have vertical axis turbines mounted on a fence. The water passes through the fence and powers the turbines. Tidal TurbinesTidal turbines are the latest water power technology used in tidal areas. They look like wind turbines that are lined together underwater. They are used to capture strong tidal flows, so they have to be built extra strong.
2More

History of wind power - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...History_of_wind_power
shared by rioshan00 on 11 Mar 13 - No Cached
  • The first windmills in Europe appear in sources dating to the twelfth century. These early European windmills were sunk post mills. The earliest certain reference to a windmill dates from 1185, in Weedley, Yorkshire, although a number of earlier but less certainly dated twelfth century European sources referring to windmills have also been adduced.
  • The first windmill used for the production of electricity was built in Scotland in July 1887 by Prof James Blyth of Anderson's College,
8More

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.
  • 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.
  • Tidal power plants are not cost effective. Millions of dollars are utilized for developing tidal power which could provide electricity in Megawatts.
  • 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.
  • not appropriate to risk £15 millions worth of money. This is the main reason why this project is yet start
8More

HowStuffWorks "How Does Geothermal Compare to Other Energy Sources? " - 0 views

science.howstuffworks.com/...geothermal-energy2.htm geothermal fossil fuels
shared by deepat00 on 11 Mar 13 - No Cached
  • Because the energy is generated right near the plant, it saves on processing and transportation costs compared to other types of fuel.
  • The initial costs of geothermal energy are high -- wells can cost $1 to $4 million each to drill, and installation of a home geothermal pump system can run as much as $30,000
  • However, a home geothermal energy pump can cut energy bills by 30 to 40 percent and will pay for itself within 5 to 10 years
  • ...3 more annotations...
  • Geothermal energy is considered renewable because the heat is continually replaced. The water that is removed is put right back into the ground after its heat is used.
  • The initial costs of geothermal energy are high -- wells can cost $1 to $4 million each to drill, and installation of a home geothermal pump system can run as much as $30,000 [sources: REPP, Consumer Energy Center]. However, a home geothermal energy pump can cut energy bills by 30 to 40 percent and will pay for itself within 5 to 10 years [source: Consumer Energy Center].
  • about 2,700 megawatts of which is produced in the United States (the equivalent of burning 60 million barrels of oil each year)
  • vanierfel98 on 11 Mar 13
     
    Not having to pay for transportation can lower the overall cost of geothermal energy.
  • 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
« First ‹ Previous 881 - 900 Next › Last »
Showing 20▼ items per page