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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."
bolendev99

Solar electricity PV (photovoltaic) panels explained - benefits, costs, savings, earnings, suitability - 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. "
dpurdy

Geothermal Education Office - Geothermal Energy - 2 views

geothermal.marin.org/geoenergy.html

geothermal pollution co2 cost

shared by dpurdy on 07 Nov 11 - No Cached
  • Like many renewable resources, geothermal resources need relatively high initial investments to access the heat, hot water and steam. But the geothermal "fuel" cost is predictable and stable. Fossil fuel supplies will increase in cost as reserves are exhausted. Fossil fuel supplies can be interrupted political disputes abroad. Renewable geothermal energy is a better long term investment.
  • Examples are the huge costs of global climate change; the health effects from ground level pollution of the air; future effects of pollution of water and land; military expenditures to protect petroleum sources and supply routes; and costs of safely storing radioactive waste for generations. Geothermal energy can already compete with the direct costs of conventional fuels in some locations and is a clean, indigenous, renewable resource without hidden external costs.
  • anonymous on 05 Oct 13
     
    today hindi news,today news talmi,hindi news www.killdo.de.gg
kramerjac99

Tidal Energy Ltd » The Technology - 0 views

www.tidalenergyltd.com/?page_id=640

tidal energy

shared by kramerjac99 on 11 Mar 13 - No Cached
  • Tidal energy is a form of hydropower that converts the energy of the tides into electricity or other useful forms of power. The tide is created by the gravitational effect of the sun and the moon on the earth. Tidal energy is therefore a predictable form of renewable energy, which can be harnessed in two forms:
  • kramerjac99 on 11 Mar 13
     
    what it is.
dpurdy

Wave power conversion systems for electrical energy production | Leonardo ENERGY - 1 views

www.leonardo-energy.org/s-electrical-energy-production

wave convert

shared by dpurdy on 30 Oct 12 - No Cached
  • Sea waves have associated a form of renewable energy which can be captured by using a hydro mechanical device that in turn drives an electrical generator to produce electrical energy.
dpurdy

Biomass Energy Home Page Biomass Energy: Cost of Production - 0 views

www.oregon.gov/...Cost.shtml

cost

shared by dpurdy on 03 Nov 11 - No Cached
  • The cost of producing ethanol varies with the cost of the feedstock used and the scale of production. Approximately 85 percent of ethanol production capacity in the United States relies on corn feedstock. The cost of producing ethanol from corn is estimated to be about $1.10 per gallon.
  • Because a gallon of ethanol contains less energy than a gallon of gasoline, the production cost of ethanol must be multiplied by a factor of 1.5 to make an energy-cost comparison with gasoline. This means that if ethanol costs $1.10 per gallon to produce, then the effective cost per gallon to equal the energy contained in a gallon of gasoline is $1.65. In contrast, the current wholesale price of gasoline is about 90 cents per gallon.
  • A major hurdle facing commercial biodiesel production is the cost of producing the fuel. Vegetable oil seed procurement, transport, storage and oil extraction accounts for at least 75 percent of the cost of producing biodiesel. The cost varies depending on the feedstock used. For example, based on the market price for industrial rapeseed grown in Washington and Idaho, the estimated cost of producing biodiesel is $2.56 per gallon of rapeseed methyl ester. Recent estimates put the cost of production in the range of $1.30 per gallon (using waste grease feedstock) to $2.00 or more per gallon using soybean oil.
  • anonymous on 28 Sep 13
     
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hardingmar00

Electricity from Geothermal Energy - 1 views

www.powerscorecard.org/tech_detail.cfm

convert geothermal

shared by hardingmar00 on 14 Mar 13 - No Cached
  • The heat from the earth's own molten core can be converted into electricity. This core consists primarily of extremely high temperature liquid rock known as magma. This "geothermal" heat circulates within the rock or is transferred to underground reservoirs of water, which also circulate under the earth's crust. Because of the near limitless ability of the earth to produce magma, and the continuous transfer of heat between subsurface rock and water, geothermal energy is considered a renewable resource.
  • faglejoh98 on 14 Mar 13
     
    "The heat from the earth's own molten core can be converted into electricity. This core consists primarily of extremely high temperature liquid rock known as magma. This "geothermal" heat circulates within the rock or is transferred to underground reservoirs of water, which also circulate under the earth's crust. Because of the near limitless ability of the earth to produce magma, and the continuous transfer of heat between subsurface rock and water, geothermal energy is considered a renewable resource. Geothermal resources have been harnessed as an energy source since the dawn of civilization, when natural hot springs were first used for cooking and bathing. The geothermal resources tapped to generate electricity are far more intense than those used for space heating and can reside as deep as 10,000 feet below the earth's surface. Capital costs for the construction of geothermal power plants are much higher than for large coal-fired plants or new natural gas turbine technologies. But geothermal plants have reasonable operation and maintenance costs and no fuel costs. Though more expensive than wind power in most cases, new geothermal electricity generation facilities are increasingly competitive with fossil options."
ballardeth99

Infrastructure Battle: Renewable Tidal Energy vs. Telecommunications - 1 views

energy.aol.com/...tidal-energy-vs-telecommunicat

tidal infrastructure

shared by ballardeth99 on 22 Oct 12 - No Cached
  • first tidal energy turbines
  • Both technologies require room for periodic ship-borne maintenance and repair access, with subsurface equipment which could impinge on the other facility if they're too close. And if one of the turbines breaks, as happened in 2010 with an earlier tidal turbine in the Bay of Fundy, PC Landing worries it could damage the nearby cable.
dpurdy

EIA Energy Kids - Renewable - 0 views

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

sustainable current

shared by dpurdy on 03 Nov 11 - No Cached
    • dpurdy
      dpurdy on 03 Nov 11
       
      Graphic showing US energy production and consumption for all energy sources, fossil fuel and renewable. 
mattisonmar00

Renewables in Combination to Expand Coverage of Energy Need | The Energy Collective - 1 views

theenergycollective.com/...-fully-cover-energy-needs-2030

wind current

shared by mattisonmar00 on 24 Sep 13 - No Cached
  • In January 2012 the San Onofre nuclear power plant, which provided power to 1.4 million homes in Southern California
  • SCE went from having 50 percent of its energy production carbon-free in 2011 to 30 percent in 2012,
brennantho98

Energy Resources: Wind power - 0 views

www.darvill.clara.net/...wind.htm

wind sustainable

shared by brennantho98 on 12 Mar 13 - No Cached
  • A good method of supplying energy to remote areas.
  • Wind is free, wind farms need no fuel.
  • The wind is not always predictable - some days have no wind.
  • ...1 more annotation...
  • Wind power is renewable. Winds will keep on blowing, it makes sense to use them.
dpurdy

Energy Resources: Wind power - 0 views

home.clara.net/...wind.htm

Wind location what how history

shared by dpurdy on 03 Nov 11 - Cached
  • The Sun heats our atmosphere unevenly, so some patches become warmer than others. These warm patches of air rise, other air blows in to replace them - and we feel a wind blowing. We can use the energy in the wind by building a tall tower, with a large propellor on the top. The wind blows the propellor round, which turns a generator to produce electricity.
  • he best places for wind farms are in coastal areas, at the tops of rounded hills, open plains and gaps in mountains - places where the wind is strong and reliable. Some are offshore.
  • The best places for wind farms are in coastal areas, at the tops of rounded hills, open plains and gaps in mountains - places where the wind is strong and reliable. Some are offshore.
  • ...4 more annotations...
  • Advantages Wind is free, wind farms need no fuel. Produces no waste or greenhouse gases. The land beneath can usually still be used for farming
  • Suitable areas for wind farms are often near the coast, where land is expensive.
  • Can be noisy. Wind generators have a reputation for making a constant, low, "swooshing" noise day and night, which can drive you nuts.
  • Wind power is renewable. Winds will keep on blowing, it makes sense to use them.
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lemairenat98

ScienceDirect.com - Renewable Energy - Initial evaluation of tidal stream energy resources at Portland Bill, UK - 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."
kramerjac99

Energy Source: Tidal Power | Renewable Energy & Efficiency | Pembina Institute - 0 views

www.pembina.org/tidal

tidal energy

shared by kramerjac99 on 11 Mar 13 - No Cached
  • idal power can be harnessed using a barrage (dam) built across an estuary that captures the potential energy generated by the change in height (or head) between high and low tides. As the tide goes in and out, the water flows through tunnels in the dam. The ebb and flow are used to either turn a water turbine or compress air through a pipe that then turns a turbine, which generates electricity. Tidal Fences and Turbines Tidal fences and turbines can also be used to capture tidal power. Tidal fences are turbines that operate like giant turnstiles, while tidal turbines are similar to wind turbines. In both cases, electricity is generated when the turbines are turned by the tidal currents that occur in coastal waters. Ocean currents generate relatively more energy than wind (air currents) because ocean water has a higher density than air and therefore applies greater force on the turbines.
  • kramerjac99 on 11 Mar 13
     
    how we use it.
millingtoneli99

Aquamarine Power - Why wave power? The potential to capture clean sustainable energy from the sea - 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."
glinbizzivic98

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)."
bannonmel99

Energy from Wind Power - 0 views

www.climatechangechallenge.org/...Energy-from-Wind-Power.htm

wind sustainable

shared by bannonmel99 on 22 Oct 12 - No Cached
  • Wind energy is a pollution-free, infinitely sustainable form of energy. It doesn’t use fuel; it doesn’t produce greenhouse gasses and it doesn’t produce toxic or radioactive waste.
hughesacam99

Wave Energy: Pros and Cons - 0 views

www.smartenergyshow.com/wave-energy-pros-and-cons.html

pros wave energy informative

shared by hughesacam99 on 23 Oct 12 - No Cached
  • wave power is one of the most researched areas of renewable energy.
  • Wave power results from the transport of energy by ocean surface waves and its capture into systems that can be therefore used for useful applications
  • Some of these applications include electricity generation, the pumping of water, or water desalination.
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