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HowStuffWorks "Underwater Turbine Electricity Production" - 0 views

science.howstuffworks.com/moon-generate-electricity1.htm tidal infrastructure
shared by ballardeth99 on 24 Oct 12 - No Cached
  • This produces the electricity that is carried by cable to shore.
  • Once it's plugged into an electrical grid, the electricity can be distributed [
  • ballardeth99 on 24 Oct 12
     
    "cable to shore. "
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Hydrogen fuel - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Hydrogen_fuel hydrogen fuel form
shared by dpurdy on 24 Oct 12 - No Cached
  • Because pure hydrogen does not occur naturally, it takes energy to manufacture it. There are different ways to manufacture it, such as, electrolysis and steam-methane reforming process.
  • In electrolysis, electricity is run through water to separate the hydrogen and oxygen atoms. This method can be used by using wind, solar, geothermal, hydro, fossil fuels, biomass, and many other resources.
  • The more natural methods of making electricity (wind, solar, hydro, geothermal, biomass), rather than fossil fuels, would be better used as to continue the environment-friendly process of the fuel. Obtaining hydrogen from this process is being studied as a viable way to produce it domestically at a low cost. Steam-methane reforming process extracts the hydrogen from methane. However, this reaction causes a side production of carbon dioxide and carbon monoxide which are greenhouse gases and contribute to global warming.
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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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US.energy.consumption.pie.chart.jpg (762×497) - 2 views

www.geography.hunter.cuny.edu/...ergy.consumption.pie.chart.jpg wave
shared by gerardijos98 on 26 Oct 12 - No Cached
  • gerardijos98 on 26 Oct 12
     
    image of US energy source use ;wave energy is others bc it is experimental 
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http://ec.europa.eu/research/energy/pdf/hlg_vision_report_en.pdf - 1 views

ec.europa.eu/...hlg_vision_report_en.pdf hydrogen uses future co2
shared by dpurdy on 26 Oct 12 - No Cached
    • slentzkel99
      slentzkel99 on 26 Oct 12
       
      Report on hydrogen economy potential 
  • dpurdy on 26 Oct 12
     
    Challenges Producing hydrogen in the large quantities necessary for the transport and stationary power markets could become a barrier to progress beyond the initial demonstration phase.  Uses: Fuel cells will be used in a wide range of products, ranging from very small fuel cells in portable devices such as mobile phones and laptops, through mobile applications like cars, delivery vehicles, buses and ships, to heat and power generators in stationary applications in the domestic and industrial sector. Future energy systems will also include improved conventional energy converters running on hydrogen (e.g. internal combustion engines, Stirling engines, and turbines) as well as other energy carriers (e.g. direct heat and electricity from renewable energy, and bio-fuels for transport). 
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Describe Two Different Energy Alternatives To... | Chegg.com - 1 views

www.chegg.com/...natives-fossil-fuels--q3091004 alternatives fossil
shared by slentzkel99 on 26 Oct 12 - No Cached
  • Difference Between Alternative Energies (Ae) And Fossil Fuels essential difference between alternative energies (AE) and fossil fuels? Alternative energies will not have a lot of pollution, but fossil fuels will cause some..
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Fuel Cells - 1 views

www.dg.history.vt.edu/...fuelcells.html fuel cell history cost
shared by shortsleevesky99 on 26 Oct 12 - No Cached
  • Current estimates for an entire system, including fuel and air supply, insulation, fuel cells stack, reformer and desulfurizer, piping, labor, depreciation, system control and power electronics is as high as $4000 per kW [20].
  • shortsleevesky99 on 11 Mar 13
     
    "The technology for fuel cells has been around since 1839. NASA further developed the technology for the Gemini space project[18],[19]. Fuel cell technology remains in a developmental phase and only in the past ten years has development significantly increased."
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Geothermal Basics - Power Plant Costs - 1 views

geo-energy.org/geo_basics_plant_cost.aspx geothermal power plant cost solar wind
shared by haguedav98 on 26 Oct 12 - No Cached
  • According to studies, an economically competitive geothermal power plant can cost as low as $3400 per kilowatt installed.
  • While the cost of a new geothermal power plant is higher than that of a comparable natural gas facility,
  • in the long run the two are similar over time. This is because natural gas construction costs account for only one third of the total price of the facility, while the cost of the fuel at a natural gas facility represents two thirds of the cost
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Kinetic energy - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Kinetic_energy tidal form
shared by smithkai143 on 26 Oct 12 - Cached
  • The kinetic energy of an object is the energy which it possesses due to its motion.[1] It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body in decelerating from its current speed to a state of rest.
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Photovoltaic power station - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Photovoltaic_power_station infrastructure transported grid solar
shared by dpurdy on 26 Oct 12 - No Cached
  • A photovoltaic power station, also known as a solar park, is a large-scale photovoltaic system designed for the supply of merchant power into the electricity grid. They are differentiated from most building-mounted and other decentralised solar power applications because they supply power at the utility level, rather than to a local user or users. They are sometimes also referred to as solar farms or solar ranches, especially when sited in agricultural areas.
  • Most stations are sited within a few kilometres of a suitable grid connection point. This network needs to be capable of absorbing the output of the solar park when operating at its maximum capacity. The project developer will normally have to absorb the cost of providing powerlines to this point and making the connection; in addition often to any costs associated with upgrading the grid, so it can accommodate the output from the plant.
  • Income is therefore affected not only by the reliability of equipment within the plant, but also by the availability of the grid network to which it is exporting
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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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Solar Electricity and how it works - Photovoltaic Systems and Components, Grid-Connecte... - 0 views

www.solardirect.com/...pvbasics.htm grid solar transported works how converted
shared by dpurdy on 26 Oct 12 - No Cached
  • A valuable feature of photovoltaic systems is the ability to connect with the existing power grid which allows owners to sell excessive electricity back to the utility with a plan known as (5) Net Metering. At times when you are not using all of the electricity produced by your system, your meter will spin backwards selling the electricity back to the (6) utility power grid at retail rate.
  • (1) Solar Electric or PV modules convert sunlight to electricity. The PV modules generate DC electricity - or direct current - sending it to the inverter. (2) The inverter transforms the DC power into AC electricity for ordinary household needs. (3) Existing electrical panel distributes solar electricity and utility power to (4) loads (appliances). For systems with a battery backup (optional), the inverter also regulates the charge of batteries. The electricity stored in the batteries can be used at night or during blackouts.
    • dpurdy
      dpurdy on 26 Oct 12
       
      Great video showing solar cell (photovoltaic) in action.
  • dpurdy on 26 Oct 12
     
    Solar is not always connected to grid. Sometimes there are batteries, otherwise your system is connected to grid to share excess electricity.
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Succeeding in the 21st Century -- Skills and Abilities for the Future TCA paper - 0 views

www.coedu.usf.edu/...tca_paper.htm all
shared by dpurdy on 24 Oct 12 - No Cached
  • The exchange of thoughts and ideas by speech or writing
  • Cooperative effort within a group in order to achieve a desired goal
  • To give rise to imaginative or artistic abilities as well as the ability to find novel solutions to problems
  • ...5 more annotations...
  • Training or control over one's conduct for personal improvement as well as the ability to forgo immediate pleasure for long term goals
  • The ability to discern factual from opinionated information
  • The effective use of grammatical rules and guidelines in order to express one's ideas in correct form
  • bility to use computer technology effectively, including word-processing and spreadsheets
  • The ability to use the defined principles of logic and effectively engage in abstract thinking to achieve mastery or understanding
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Pros & Cons of Wave Energy | eHow.com - 0 views

www.ehow.com/045_pros-cons-wave-energy.html pollution pros wave energy
shared by hughesacam99 on 23 Oct 12 - No Cached
  • Unlike fossil fuels, wave power doesn't cause air pollution.
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Why We Need Solar Power - 0 views

www.getmysolartoday.com/why-we-need-solar-power infrastructure
shared by ackleysam99 on 23 Oct 12 - No Cached
  • When we look at what is available today in solar equipment it has come a long way  but still needs a long way to go.
  • ater they installed a solar hot air collector; this unit worked awesome during the winter months. It would raise the temperature of the home to the mid 80’s during the winter if you continued to let it run.
  • Yet each year we are becoming more energy efficient. The growing problem that really disturbs me is that while I consume less energy then I did in previous years my energy bills continue to climb at a record pace.
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Pros & Cons of Solar Energy - 0 views

www.clean-energy-ideas.com/..._and_cons_of_solar_energy.html pollution
shared by ackleysam99 on 22 Oct 12 - Cached
  • Solar panels give off no pollution, the only pollution produced as a result of solar panels is the manufacturing of these devices in factories, transportation of the goods, and installation.
  • he production of energy from the use of fossil and some renewable fuels (e.g. wind turbines) can be noisy, yet solar energy produces electricity very
  • quietly
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The Disadvantages Of A Solar Generator | LIVESTRONG.COM - 1 views

www.livestrong.com/...dvantages-of-a-solar-generator cost
shared by ackleysam99 on 22 Oct 12 - No Cached
  • Solar power generators offer a no-emission alternative to ones that use fossil fuel. These generators come in small, portable sizes for temporary power or larger arrays for permanent energy production.
  • availability of sunlight given local weather conditions and the resilience of the photovoltaic cells when purchasing a solar generator.
  • Most photovoltaic cells rely on silicon crystals to generate power. Demand for silicon has driven its price higher, meaning a solar generator can require a sizable initial investment. In fact, SolarBuzz notes that 45 percent of solar cell cost comes from the silicon wafer. Typical 2 kilowatt solar generators cost from $16,000 to $20,000.
  • ...2 more annotations...
  • Solar generators powerful enough to supply electricity for a whole home also require a lot of space, with roof-mounted panels needing at least 50 square feet and possibly as much as
  • 1,000 square feet. Lack of Durability
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Hydrogen Fuel Cell | Yale Office of Sustainability - 1 views

sustainability.yale.edu/hydrogen2 pollution use how
shared by giumarraant99 on 22 Oct 12 - No Cached
  • At 250 kilowatts, the fuel cell produces 40-50% of the electricity for the Environmental Science Center. Its electricity production alone is 47% effective, and the addition of heat recovery allows for up to 60% efficiency
  • While designed to run on pure hydrogen, Yale’s fuel cell is actually powered by natural gas, 80% of which is usable hydrogen. The fuel cell takes in natural gas and water and produces water, electricity, and hot air.
  • giumarraant99 on 22 Oct 12
     
    Explains what this energy source is best suited for and how this energy source reduces other forms of pollution
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HowStuffWorks "Algae Biodiesel Engineering: Extracting Oil from Algae " - 0 views

science.howstuffworks.com/...algae-biodiesel2.htm
shared by janosjus99 on 22 Oct 12 - No Cached
  • How can we get oil from algae? It's like getting juice from an orange -- with an additional chemical reaction thrown in
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NREL: Learning - Biofuels Basics - 0 views

www.nrel.gov/...re_biofuels.html
shared by janosjus99 on 22 Oct 12 - Cached
  • Unlike other renewable energy sources, biomass can be converted directly into liquid fuels, called "biofuels," to help meet transportation fuel needs
  • Today, ethanol is made from starches and sugars, but NREL scientists are developing technology to allow it to be made from cellulose and hemicellulose,
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