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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.
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fuel cell Facts, information, pictures | Encyclopedia.com articles about fuel cell - 0 views

www.encyclopedia.com/...fuel_cell.aspx fuel cell
shared by Connor Wiggins on 12 Mar 13 - No Cached
  • Fuel cells convert chemical energy to electrical energy by combining hydrogen from fuel with oxygen from the air. Hydrogen fuel can be supplied in two ways—either directly as pure hydrogen gas or through a "fuel reformer" that converts hydrocarbon fuels such as methanol, natural gas, or gasoline into hydrogen-rich gas. A fuel cell's only emission is water.
  • Connor Wiggins on 12 Mar 13
     
    What fuel cell is and how its made 
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5. Effects on the environment - Geothermal energy - Te Ara Encyclopedia of New Zealand - 0 views

www.teara.govt.nz/...page-5 geothermal pollution
shared by shinecal99 on 12 Mar 13 - No Cached
  • shinecal99 on 12 Mar 13
     
    "Natural features such as hot springs, mud pools, sinter terraces, geysers, fumaroles (steam vents) and steaming ground can be easily, and irreparably, damaged by geothermal development."
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BIOFUELS: What are they? How can they be used as an energy source (either on-...(Q&A) - 0 views

energyexperts.org/...ResourceDetail.aspx biodiesel biofuels biofuel form
shared by lefebvrekat99 on 12 Mar 13 - No Cached
  • ofuels can be derived from almost any type of "biomass," a broad term that refers to living or recently alive biological material. Because biomass is produced on a short time scale, it is considered a renewable resource. I will describe types of biofuels—ethanol, biodiesel, syngas, bio-hydrogen, biogas, and solid biofuel—and their use. I'll also identify the crops and wastes being used to produce biofuels, and some issues surrounding biofuel production. How are biofuels being used? Biofuels are already used to supply a small fraction of our energy needs, with significant opportunities to expand their use as infrastructure is developed. In addition to ethanol and biodiesel for transportation, biofuels are currently used for power production, heating and cooling of buildings, and the thermal needs of industry. Biomass is today the largest non-hydroelectric renewable source for electricity produced in the U.S. Most of this is produced in pulp and paper mills, which often generate electricity by burning wood chips, bark, or the sludges and "liquors" that are byproducts of the paper-making process. At the same time, they recover waste heat from electricity generation to meet the thermal needs of the mill. This highly efficient combination is referred to as combined heat and power (CHP) or cogeneration. The electricity generated may be used onsite and/or supplied to the local utility for distribution to the public.
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Environmental impact of wind power - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...ronmental_impact_of_wind_power cost pollution
shared by jack wells on 12 Mar 13 - No Cached
  • Compared to the environmental impact of traditional energy sources, the environmental impact of wind power is relatively minor, slightly higher than the environmental impact of hydro power on a life-cycle basis. Unlike electricity derived from fossil fuel-powered generating plants, wind power consumes no fuel and emits no air pollution in operation. As well, wind power consumes no fuel in operation, unlike nuclear power plants which do.
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How does wind generate electricity? - Curiosity - 1 views

curiosity.discovery.com/...-turbines-generate-electricity wind convert
shared by wellsann99 on 12 Mar 13 - No Cached
  • the wind turbine collects kinetic energy from the wind and transfers it to the generator. The blades on the turbine turn as the wind blows. As these blades move, they rotate a shaft connected to the rotor of a generator. The spinning magnets of the generator convert that rotational energy into electricity.
  • wellsann99 on 12 Mar 13
     
    how wind becomes electricty
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Price List | Bergey Wind PowerBergey Wind Power - 0 views

bergey.com/price-list
shared by cottonetar98 on 12 Mar 13 - No Cached
  • It’s like buying vs. renting a home. Over the next 10 years a typical homeowner or small business will pay $18,000 to over $50,000 in electric bills, at rates that often increase faster than inflation. When you choose a Bergey wind system you take the same monthly expense and invest it in a tangible asset. Once your Bergey turbine is paid off, you will enjoy more money in your pocket every month for the next 20 – 40 years. Tax credits and rebates make it affordable. Small wind turbines qualify for a 30% federal tax credit and, for businesses, accelerated depreciation.  USDA grants are available for farmers, ranchers, and rural businesses.  Many states offer additional incentives (see www.dsireusa.org).  These incentives make owning a Bergey wind turbine surprisingly affordable.
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Solar Power-Advantages and Disadvantages - 0 views

alternate-power.org/r-advantages-and-disadvantages advantage solar
shared by manzellaann99 on 11 Mar 13 - No Cached
  • Advantage: Solar energy is a completely renewable resource
  • The Solar Cells and Solar Panels that are needed to harness solar energy tend to be very expensive when you first purchase them.
  • Solar powered panels and products are typically extremely easy to install
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Directory:Cents Per Kilowatt-Hour - PESWiki - 0 views

peswiki.com/...ectory:Cents_Per_Kilowatt-Hour fossil fuels cost
shared by mchughkon99 on 22 Mar 13 - No Cached
  • GasCurrently supplies around 15% of the global electricity demand. 3.9 - 4.4 Cents/kW-h Gas-fired plants and generally quicker and less expensive to build than coal or nuclear, but a relatively high percentage of the cost/KWh is derived from the cost of the fuel. Due to the current (and projected future) upwards trend in gas prices, there is uncertainty around the cost / KWh over the lifetime of plants. Gas burns more cleanly than coal, but the gas itself (largely methane) is a potent greenhouse gas. Some energy conversions to calculate your cost of natural gas per kwh. 100 cubic feet (CCF)~ 1 Therm = 100,000 btu ~ 29.3 kwh. CoalCurrently supplies around 38% of the global electricity demand. 4.8 - 5.5 Cents/kW-h Increasingly difficult to build new coal plants in the developed world, due to environmental requirements governing the plants. Growing concern about coal fired plants in the developing world (China, for instance, imposes less environmental overhead, and has large supplies of high sulphur content coal). The supply of coal is plentiful, but the coal generation method is perceived to make a larger contribution to air pollution than the rest of the methods combined. NuclearCurrently supplies around 24% of the global electricity demand. 11.1 - 14.5 Cents/kW-h Political difficulties in using nuclear in some nations. Risk of widespread (and potentially lethal) contamination upon containment failure. Fuel is plentiful, but problematic. Waste disposal remains a significant problem, and de-commissioning is costly (averaging approximately US $320MM per plant in the US).
  • mchughkon99 on 22 Mar 13
     
    cost for fossil fuels
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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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HowStuffWorks "Mechanics of Hand-powered Generators" - 1 views

electronics.howstuffworks.com/...hand-powered-generators1.htm fossil fuels convert
shared by dpurdy on 19 Mar 13 - No Cached
  • A generator is basically an electric motor working in reverse.
  • By spinning a coil of wire around a magnet, he found that he could create a steady current. Thus, he could convert energy used to spin the coil into electrical energy.
  • This principle powers generators that run on gasoline or diesel fuel, as well as the massive turbines in modern power plants, where the coils are turned by falling water or steam generated by burning coal or igniting nuclear reactions.
  • dpurdy on 19 Mar 13
     
    How a generator works
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Biofuel Guide - Introduction to Ethanol and Biodiesel - 0 views

biofuelguide.net biofuel convert form cost
shared by dpurdy on 19 Mar 13 - Cached
  • First generation biofuel are those fuel derived from vegetable or animal fats/oils, starch or sugar with the use of modern technology.
    • dpurdy
      dpurdy on 19 Mar 13
       
      Gallons per acre In the perspective of land use and agricultural efficiency, ethanol seems to be a good choice. The reason is that about 420 gallons of ethanol can be generated per acre in contrast to 60 gallons of biodiesel per acre soybeans. Consequently, the cost of soybean oil would significantly increase if biodiesel production is increased as well.
  • 1. Let the base organic material (corn, sugarcane, wheat, etc) pass through a grinding meal to pulverize the selected material. 2. Then, liquefy it by placing the blend of water, grain powder and an enzyme that facilitates the breakdown of the grain compound into a high-heat cooker. 3. Cool it afterwards. Add another enzyme that will facilitate the conversion of starch into sugars which are then fermented, producing alcohol from the cooled mash. 4. Start the fermentation by adding yeast to the sugar mixture. The sugars will be broken down to ethanol (a form of alcohol) and carbon dioxide. 5. Distill the fermented mixture in order for the ethanol to separate from the solids. 6. Get rid of the water from the separated ethanol through a dehydration process.
  • dpurdy on 19 Mar 13
     
    "Cellulose ethanol production is newly discovered experimental processes which can breakdown cellulose in woody fibers. This would only mean that through this method, ethanol from crop wastes, trees and grasses can be derived. It is significantly better since trees and grasses require small amount of energy in comparison to grains that must be replanted annually. "
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Explainer: what are biofuels? | Biofuels | SBS World News - 0 views

www.sbs.com.au/...Explainer-what-are-biofuels biofuel form
shared by dpurdy on 06 Apr 13 - No Cached
  • The biofuel industry takes the chemical energy contained in organic materials and converts this into useful energy sources. However, it is not necessarily a sustainable industry. Daniel Tan explains.
  • dpurdy on 06 Apr 13
     
    Explanation of the form of bio fuels.
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The hidden costs of fossil fuels - and biofuels, too - CSMonitor.com - 1 views

www.csmonitor.com/...-fossil-fuels-and-biofuels-too fossil fuels pollution cost biofuel
shared by dpurdy on 06 Apr 13 - No Cached
  • Climate considerations aside, damages wrought by ethanol made from corn were usually similar to, or even slightly worse, than damages from gasoline. That’s because of the extra energy needed to convert corn to biofuel.
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Re: How is tidal power converted to electricity? - 0 views

www.madsci.org/...1017154685.Ph.r.html tidal convert how electricity
shared by smithkai143 on 29 Oct 12 - No Cached
  • Tidal Energy originates from gravitational Energy. Imagine you have a damn- like structure built along a river. During the high tide, the water flows into the river, causing the turbine to rotate and thus generating electricity. During the low tide, the water flows from the river to the sea, again, turning the turbine. (An electricity generating turbine consists of rotating wires surrounded by strong fixed magnetic field)
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What environmental benefits does tidal energy have compared to the traditional fossil f... - 0 views

www.answerbag.com/721036 tidal form fossil fossil fuel fuel
shared by smithkai143 on 29 Oct 12 - No Cached
  • A benefit is very little pollution. However, there is a very serious potential draw back. It can be very hard of fish populations. The proposal for tidal power is to put turbines on the bottom of a bay and let the water rushing in and out with the tide turn them and generate electricity. However, along with the water will come fish and other marine animals. What do you think will happen when these critters get sucked into the turbines. Can you say sushi, boys and girls? Putting some kind of screen in front of the turbine to prevent this would just mean that the animals would be sucked up against the screens, obstructing the flow of water through the turbines.
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List of Tidal Power Plants and Future Tidal Stations- Facing Difficult Times | Green Wo... - 0 views

www.greenworldinvestor.com/...tations-facing-difficult-times tidal future
shared by dpurdy on 30 Oct 12 - No Cached
  • Except for South Korea,not other government in the world is really pushing Tidal Wave Energy which needs massive government support at this stage of development.
  • Tidal Technology is still in the baby phase
  • Most of the tidal power plants using the modern tidal turbine technology are still in the pilot phase and generate negligible power.However tidal power stations have the potential to generate large amounts of energy in a non-polluting way
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