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ScienceDirect.com - Renewable Energy - Initial evaluation of tidal stream energy resour... - 0 views

www.sciencedirect.com/...S0960148105002193 tide current
shared by lemairenat98 on 12 Mar 13 - No Cached
  • Portland Bill (Dorset, UK) is a promising site for tidal stream energy exploitation; it combines high tidal stream velocities around the headland with a location closer to population centres than other proposed sites.
  • lemairenat98 on 12 Mar 13
     
    "Portland Bill (Dorset, UK) is a promising site for tidal stream energy exploitation; it combines high tidal stream velocities around the headland with a location closer to population centres than other proposed sites."
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How Tidal Power is Riding the Crest of a Wave - 1 views

www.renewableenergyworld.com/...-is-riding-the-crest-of-a-wave tide wave
shared by crandallmad00 on 12 Mar 13 - No Cached
  • The argument for tidal power is overwhelming: it’s a practically infinite supply of clean energy and has one of the smallest carbon footprints of any power source; it’s reliable, cost-efficient, has minimal effect on the marine environment and virtually zero effect on sea-gazing aesthetics. Most importantly, The World Energy Council estimates that the energy that can be harvested from world’s oceans is equal to twice the electricity that the world produces now
  • A reason many energy experts are looking at what tidal may be able to contribute, compared to other renewable sources like wind power, is that the amount of energy generated from a power-generating turbine is proportional to the density of the fluid that flows back and forth – meaning a water turbine has several hundred times the power of an air turbine.
  • Seawater is denser than air; a lot denser – 832 times to be exact, meaning an 8 knot tidal current has more energy than a 380kph wind. This means a wave farm of ‘sea snakes’ – devices built by Scotland’s Pelamis Wave Power – covering half a square mile of ocean could produce 30 MWh of power, which is estimated to be enough for 20,000 homes. A wave farm covering 472 square miles could supply 24 million households – enough for the entire UK.
  • ...1 more annotation...
  • Partly this has been due to the uncertainty of how to harness all this abundant marine energy. While it’s great that there’s the potential to harness up to 153 GW of tidal power in the UK alone,
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The Disadvantages of Wave Energy | eHow.com - 0 views

www.ehow.com/disadvantages-wave-energy.html wave pollution
shared by rosskyl99 on 22 Oct 12 - No Cached
  • Because waves are erratic, the amount of energy a wave generator can produce is unpredictable and, therefore, cannot be used as a sole reliable energy source.
  • accidental hydraulic fluid leaks can cause a major environmental problem.
  • A collision could cause a hydraulic spill or leak and become an environmental hazard.
  • ...6 more annotations...
  • Boats not able to see the generators could cause a potential collision hazard and pose problems for the safety of both those on board and to the wave energy generator.
  • Wave energy boasts many advantages such as its low cost, zero to no pollution, and a large energy output.
  • Wave energy generators can cause noise pollution and be a nuisance to those living close to them, according to the UK Department for Business Innovation & Skills. The noise emanating from a generator, though, is often covered up by the noise of the waves.
  • Wave energy generators can cause noise pollution and be a nuisance to those living close to them, according to the UK Department for Business Innovation & Skills. The noise emanating from a generator, though, is often covered up by the noise of the waves. Wave power generators can also be unsightly to some.
  • Wave energy generators can cause noise pollution and be a nuisance to those living close to them, according to the UK Department for Business Innovation & Skills. The noise emanating from a generator, though, is often covered up by the noise of the waves. Wave power generators can also be unsightly to some.
  • Wave energy generators can cause noise pollution and be a nuisance to those living close to them, according to the UK Department for Business Innovation & Skills. The noise emanating from a generator, though, is often covered up by the noise of the waves. Wave power generators can also be unsightly to some. Floating devices are large snake-like machines floating parallel to one another throughout an area close to the seashore. Some may find them offensive or unpleasant.
  • rosskyl99 on 12 Mar 13
     
    wave cost is low
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BBC News - UK tidal power has huge potential, say scientists - 0 views

www.bbc.co.uk/...science-environment-20983645 renewable tidal energy UK
shared by rascoekat00 on 23 Sep 13 - No Cached
  • Despite high costs, experts say tidal power is more reliable than wind.
  • The UK is underestimating the amount of electricity that could be generated from tidal sources, new research says.
  • rascoekat00 on 23 Sep 13
     
    Despite high costs, experts say tidal power is more reliable than wind.
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MIT's artificial leaf is ten times more efficient than the real thing (Wired UK) - 0 views

www.wired.co.uk/...artificial-leaf solar hydrogen how sustainable
shared by dpurdy on 24 Oct 12 - No Cached
  • The device is an advanced solar cell, no bigger than a typical playing card, which is left floating in a pool of water. Then, much like a natural leaf, it uses sunlight to split the water into its two core components, oxygen and hydrogen, which are stored in a fuel cell to be used when producing electricity.
  • dpurdy on 24 Oct 12
     
    This is an amazing breakthrough in developing hydrogen.
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http://www.bis.gov.uk/assets/foresight/docs/energy/hydrogen-and-fuel-cells-towards-a-su... - 1 views

www.bis.gov.uk/...wards-a-sustainable-future.pdf CO2 pollution use
shared by giumarraant99 on 22 Oct 12 - No Cached
    • giumarraant99
      giumarraant99 on 22 Oct 12
       
      Read abstract.. why hydrogen and fuel cells
  • giumarraant99 on 22 Oct 12
     
    CO2 pollution use (sticky note)
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BBC News - Wilburton giant solar farm connected to National Grid - 0 views

www.bbc.co.uk/...ngland-cambridgeshire-14218355 solar grid transported infrastructure how
shared by dpurdy on 26 Oct 12 - No Cached
  • dpurdy on 26 Oct 12
     
    Video shows farm connected to grid. This shows the type of infrastructure that will need to be installed. 
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Sustainability Standards « biofuelwatch - 0 views

www.biofuelwatch.org.uk/...sustainability-standards biofuel sustainable
shared by schmettererdav00 on 25 Sep 13 - No Cached
  • Biofuelwatch has released a new report, ‘Sustainable Biomass: A Modern Myth’. It explores the certification companies certifying biomass as sustainable, the UK government’s proposed sustainability criteria for biomass, and developer’s ‘promises’ to source sustainable biomass.
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peak_flow_spring.png (1170×907) - 0 views

www.engineering.lancs.ac.uk/...peak_flow_spring.png tide picture
shared by warneraus98 on 12 Mar 13 - No Cached
  • warneraus98 on 12 Mar 13
     
    renewable
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Tidal Energy | Renewable Energy Development - 0 views

renewableenergydev.com/tidal-energy cost tide
shared by murphymat98 on 12 Mar 13 - No Cached
  • The cost of setting up a tidal power station can be very high, although once in place the operating costs are low. As an example of the cost of setting up, a proposed 8000 MW tidal power plant and barrage system on the Severn Estuary in the UK has been estimated to cost US$15 billion, while another in the San Bernadino strait which would produce 2,200 MW as a tidal fence in the Philippines will cost an estimated US$3 billion.
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Solar electricity PV (photovoltaic) panels explained - benefits, costs, savings, earnin... - 1 views

www.energysavingtrust.org.uk/...Solar-panels-PV solar sustainable
shared by bolendev99 on 08 Mar 13 - No Cached
  • bolendev99 on 08 Mar 13
     
    "The benefits of solar electricity Cut your electricity bills: sunlight is free, so once you've paid for the initial installation your electricity costs will be reduced. Get paid for the electricity you generate: the government's Feed-In Tariffs pay you for the electricity you generate, even if you use it. Sell electricity back to the grid: if your system is producing more electricity than you need, or when you can't use it, you can sell the surplus back to the grid. Cut your carbon footprint: solar electricity is green, renewables energy and doesn't release any harmful carbon dioxide] or other pollutants. A typical home solar PV system could save over a tonne of carbon dioxide per year - that's more than 30 tonnes over its lifetime. "
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Wind Energy - 0 views

www.sustainablestuff.co.uk/windpowerenergy.html wind sustainable
shared by mcgrawjac98 on 08 Mar 13 - No Cached
  • Wind Energy, like Solar Energy is fully sustainable, being generated by natural wind flows, which in the U.K. are reliable enough to guarantee a stable, near constant supply of energy. Wind Power can be easily set up, either at home (see related article) or on a larger scale, by energy suppliers keen to meet government targets to reduce carbon emissions that are produced by conventional power stations.
  • mcgrawjac98 on 08 Mar 13
     
    "Wind Energy, like Solar Energy is fully sustainable, being generated by natural wind flows, which in the U.K. are reliable enough to guarantee a stable, near constant supply of energy. Wind Power can be easily set up, either at home (see related article) or on a larger scale, by energy suppliers keen to meet government targets to reduce carbon emissions that are produced by conventional power stations."
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BioDiesel Frequently Asked Questions | Rye Bio Fuels - 0 views

www.ryebiofuels.co.uk/bio-diesel-faq.php form biofuel
shared by greenhan99 on 11 Mar 13 - No Cached
  • biofuel has been recently grown, rather than stored and processed over many years. Biofuel is made from what can be grown today whereas fossil fuel comes from biomatter grown millions of years ago – and is therefore not renewable
  • Biodiesel is a clean, renewable and domestically produced diesel fuel. Both biofuels and fossil fuels are of an organic nature (made from biological matter) but biofuel has been recently grown, rather than stored and processed over many years. Biofuel is made from what can be grown today whereas fossil fuel comes from biomatter grown millions of years ago – and is therefore not renewable . Biofuel is not a finite resource - we are only limited by what we can grow.
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Tidal Energy | Marine Current Turbines - 0 views

www.marineturbines.com/Tidal-Energy tidal tide
shared by mannixjul00 on 11 Mar 13 - No Cached
  • idal turbines are very much like an underwater windmill where the blades are driven by consistent, fast-moving currents.  The submerged rotors harness the power of the tidal streams to drive generators, which in turn produce electricity. Water is 832 times denser than air so consequently tidal turbine rotors can be are much smaller than wind turbine rotors generate equivalent  amounts of electricity, and they can be deployed much closer together. Devices that harness tidal stream energy present a unique set of engineering challenges in terms of design, installation and maintenance. During operation, the force of the tidal flow in Strangford Lough is equivalent to a 345 mph wind generating a 100 tonnes of thrust on the rotors. The unique SeaGen design allows capture of the maximum amount of tidal energy whilst keeping maintenance and connectivity costs low.
  • Tidal turbines are very much like an underwater windmill where the blades are driven by consistent, fast-moving currents.  The submerged rotors harness the power of the tidal streams to drive generators, which in turn produce electricity. Water is 832 times denser than air so consequently tidal turbine rotors are much smaller than wind turbine rotors generate equivalent  amounts of electricity, and they can be deployed much closer together. Devices that harness tidal stream energy present a unique set of engineering challenges in terms of design, installation and maintenance. During operation, the force of the tidal flow in Strangford Lough is equivalent to a 345 mph wind generating a 100 tonnes of thrust on the rotors.
  • kramerjac99 on 11 Mar 13
     
    How it works.
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Fuel Cells for a Sustainable Future? | Tyndall°Centre for Climate Change Rese... - 0 views

www.tyndall.ac.uk/...fuel-cells-sustainable-future fuel cell sustainable
shared by carpenteraut98 on 11 Mar 13 - No Cached
  • >It is found that there are both technical and non technical barriers to the development of stationary fuel cells as a major component towards sustainable energy.
  • >It is found that there are both technical and non technical barriers to the development of stationary fuel cells as a major component towards sustainable energy.
  • carpenteraut98 on 11 Mar 13
     
    "It is found that there are both technical and non technical barriers to the development of stationary fuel cells as a major component towards sustainable energy"
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Generate Your Own Wind Energy - 0 views

www.sustainablestuff.co.uk/GenerateYourOwnWindEnergy.html wind energy cost pollution
shared by mcdermottaar99 on 11 Mar 13 - No Cached
  • As with installing your own solar energy, installing wind energy will help to reduce carbon emissions, which damage the environment and will save money.
  • It's only downfall is possibly the visual impact it makes on the landscape: A tall 'small scale' generator could attract wide rebuttal from neighbours, and this is worth considering before embarking on a wind generation project. However, if you live in a remote area, which benefits from exposure to the wind, or have neighbours that are happy for you to go ahead with the project, installing wind power can be an economically viable way to capitalise on natural, renewable resources
  • A wind generator will cost in the region of £3'000 - £15'000, at about £3'000 per kilowatt.
  • ...1 more annotation...
  • You can expect a wind generator to pay for itself in little over five years, and with conventional energy prices soaring, the dividends will increase with time.
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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."
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