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logansar99

Wave Energy - 2 views

ocsenergy.anl.gov/...index.cfm

wave location

shared by logansar99 on 22 Oct 12 - Cached
  • northwestern coasts of the United States.
  • Positive or negative impacts on marine habitat (depending on the nature of additional submerged surfaces, above-water platforms, and changes in the seafloor);
  • Toxic releases from leaks or accidental spills of liquids used in those systems with working hydraulic fluids;
  • ...3 more annotations...
  • Conflict with other sea space users, such as commercial shipping and recreational boating;
  • Visual and noise impacts (device-specific, with considerable variability in visible freeboard height and noise generation above and below the water surface)
  • Wave power varies considerably in different parts of the world, and wave energy can't be harnessed effectively everywhere
ackleysam99

Solar energy 'cheaper than fossil fuels in 5 years' - 0 views

www.lowcarboneconomy.com/...3442

cost

shared by ackleysam99 on 22 Oct 12 - No Cached
  • Speaking to Silicon.com, the author of The Age of Intelligent Machines, said that nanotechnology could help solve the world's energy crisis and make solar technology cheaper.
giumarraant99

http://www.bis.gov.uk/assets/foresight/docs/energy/hydrogen-and-fuel-cells-towards-a-sustainable-future.pdf - 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)
troisichr99

Research Report: does solar power contribute to global warming - 1 views

ultimate-research-assistant.com/ResearchReport.asp

co2 solar

shared by troisichr99 on 22 Oct 12 - No Cached
  • But only about 12 percent gets turned into electricity, and the rest is reradiated as heat--which contributed to Global Warming
  • solar panels trap a greater amount of energy from the sun than the natural terrain (since it is black) and consequently retains that energy on earth contributing to the rising temperatures on the planet.
espercla98

What is photon? - Definition from WhatIs.com - 1 views

whatis.techtarget.com/...photon

solar what form

shared by espercla98 on 24 Oct 12 - No Cached
  • Modern physicists have demonstrated that the energy in any electromagnetic field is made up of discrete packets. The term photon (meaning "visible-light particle") has been coined for these energy packets.
  • espercla98 on 24 Oct 12
     
    "The term photon (meaning "visible-light particle")"
slentzkel99

Haldor Topsoe - Fuel cells for sustainable energy - 0 views

www.topsoe.com/...fuel_cells.aspx

hydrogen what convert use

shared by slentzkel99 on 23 Oct 12 - No Cached
  • What is a fuel cell?A fuel cell produces electricity from fuel and air. The simplest fuel cell produces electricity from hydrogen and air with water as the only by-product.
  • Where can fuel cells be used?Fuel cells in general can be used in many different circumstances, depending on the type of fuel cell. Topsoe Fuel Cell focuses on SOFC fuel cells, which can be used in:Auxiliary power units (APUs) provide electricity where there is no access to grid power. Fuel cell based APUs can be used on, for instance, long-haul trucks to generate power during breaks.Micro combined heat and power units may be scaled to meet the electricity demand in single family households. Combined heat and power generation for households is one of the most efficient ways to meet residential energy requirements.Distributed generation using SOFC technology offers efficient power generation, for example hospitals, shopping malls, in apartment buildings and in areas with low power capacity.
chadwickall99

Basics of Wind Energy - 1 views

zebu.uoregon.edu/...l14.html

wind what

shared by chadwickall99 on 23 Oct 12 - No Cached
  • Kinetic Energy of wind
dpurdy

Winner Announced: Design an Infographic About Energy - Design - GOOD - 0 views

www.good.is/...gn-an-infographic-about-energy

sustainable Fossil fuel

shared by dpurdy on 14 Feb 12 - No Cached
  • anonymous on 05 Oct 13
     
    today hindi news,today news talmi,hindi news www.killdo.de.gg
dynesbri97

Wind - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/Wind

shared by dynesbri97 on 13 Mar 12 - Cached
  • Wind is the flow of gases on a large scale. On Earth, wind consists of the bulk movement of air. In outer space, solar wind is the movement of gases or charged particles from the sun through space, while planetary wind is the outgassing of light chemical elements from a planet's atmosphere into space. Winds are commonly classified by their spatial scale, their speed, the types of forces that cause them, the regions in which they occur, and their effect. The strongest observed winds on a planet in our solar system occur on Neptune and Saturn.
  • Winds can shape landforms, via a variety of aeolian processes such as the formation of fertile soils, such as loess, and by erosion. Dust from large deserts can be moved great distances from its source region by the prevailing winds; winds that are accelerated by rough topography and associated with dust outbreaks have been assigned regional names in various parts of the world because of their significant effects on those regions. Wind affects the spread of wildfires. Winds disperse seeds from various plants, enabling the survival and dispersal of those plant species, as well as flying insect populations. When combined with cold temperatures, wind has a negative impact on livestock. Wind affects animals' food stores, as well as their hunting and defensive strategies.
  • Wind is caused by differences in pressure. When a difference in pressure exists, the air is accelerated from higher to lower pressure. On a rotating planet, the air will be deflected by the Coriolis effect, except exactly on the equator. Globally, the two major driving factors of large-scale winds (the atmospheric circulation) are the differential heating between the equator and the poles (difference in absorption of solar energy leading to buoyancy forces) and the rotation of the planet. Outside the tropics and aloft from frictional effects of the surface, the large-scale winds tend to approach geostrophic balance. Near the Earth's surface, friction causes the wind to be slower than it would be otherwise. Surface friction also causes winds to blow more inward into low pressure areas.
  • ...1 more annotation...
  • [hide]General wind classifications Tropical cyclone classifications (all winds are 10-minute averages) Beaufort scale[17] 10-minute sustained winds (knots) General term[20] N Indian Ocean IMD SW Indian Ocean MF Australian region South Pacific BoM, BMKG, FMS, MSNZ NW Pacific JMA NW Pacific JTWC NE Pacific & N Atlantic NHC & CPHC 0 <1 Calm Low Pressure Area Tropical disturbance Tropical low Tropical Depression Tropical depression Tropical depression Tropical depression 1 1–3 Light air 2 4–6 Light breeze 3 7–10 Gentle breeze 4 11–16 Moderate breeze 5 17–21 Fresh breeze Depression 6 22–27 Strong breeze 7 28–29 Moderate gale Deep depression Tropical depression 30–33 8 34–40 Fresh gale Cyclonic storm Moderate tropical storm Tropical cyclone (1) Tropical storm Tropical storm Tropical storm 9 41–47 Strong gale 10 48–55 Whole gale Severe cyclonic storm Severe tropical storm Tropical cyclone (2) Severe tropical storm 11 56–63 Storm 12 64–72 Hurricane Very severe cyclonic storm Tropical cyclone Severe tropical cyclone (3) Typhoon Typhoon Hurricane (1) 13 73–85 Hurricane (2) 14 86–89 Severe tropical cyclone (4) Major hurricane (3) 15 90–99 Intense tropical cyclone 16 100–106 Major hurricane (4) 17 107–114 Severe tropical cyclone (5) 115–119 Very intense tropical cyclone Super typhoon >120 Super cyclonic storm Major hurricane (5)
filionmar99

Uses of Biofuel | National Geographic - 1 views

greenliving.nationalgeographic.com/uses-biofuel-2775.html

biofuel current

shared by filionmar99 on 13 Mar 12 - No Cached
  • Even normal
  • gasoline vehicles can operate on a 10 percent ethanol blend with no problems. Diesel cars and trucks can run on biodiesel, though older models may need to have their fuel lines and gaskets replaced with modern synthetic materials, since biodiesel is a solvent
  • and use of biofuels to power aircraft is expected to increase substantially in the next decade. Because current biofuel production relies heavily on crops that also function as food or livestock feed, emphasis is on developing new sources that don't cause deforestation and compete with food production
  • ...1 more annotation...
  • Small engines, like those found in lawn mowers and chainsaws, can use ethanol blends up to 10 percent without problems. The barrier to using higher blends, up to 20 percent, has more to do with manufacturers' warranties than limitations of the technology
  • filionmar99 on 23 Oct 12
     
    this gives good info about the current energy being generated in the us today
efana1

http://www.hydrogen.energy.gov/pdfs/doe_h2_fuelcell_factsheet.pdf - 3 views

www.hydrogen.energy.gov/...doe_h2_fuelcell_factsheet.pdf

hydrogen potential future how

shared by efana1 on 13 Mar 12 - No Cached
    • efana1
      efana1 on 15 Mar 12
       
      Good overview of the potential uses
  • daleymax98 on 13 Mar 12
     
    Facts about Hydrogen Fuel Cells
gillinghammic98

Solar Energy Facts - 0 views

www.jc-solarhomes.com/solar_energy_facts.htm

shared by gillinghammic98 on 15 Mar 12 - Cached
  • he energy from the sun  varies from place to place and is very dependent on weather conditions. Without an atmosphere 1.4 KW/m2 per hour is available, but with an atmosphere we can only count on 1KW/m2 per hour in the absence of clouds. So, if asked how much 3 hours of sunlight on one square meter is worth what would you say?
smithree98

Hydrogen Fuel-Cell Vehicles - Is Hydrogen the Fuel of the Future? - 1 views

environment.about.com/...fcv.htm

hydrogen fuel all benifits

shared by smithree98 on 15 Mar 12 - No Cached
  • The benefits of ditching fossil fuels for hydrogen are many, of course. Burning fossil fuels like coal, natural gas and oil to heat and cool our buildings and run our vehicles takes a heavy toll on the environment, contributing significantly to both local problems such as elevated particulate levels and global ones such as a warming climate. The only by-product of running a hydrogen-powered fuel cell is oxygen and a trickle of water, neither of which will cause any harm to human health or the environment.
  • But right now, 95 percent of the hydrogen available in the United States is either extracted from fossil fuels or made using electrolytic processes powered by fossil fuels, thus negating any real emissions savings or reduction in fossil-fuel usage. Only if renewable energy sources—solar, wind and others—can be harnessed to provide the energy to process hydrogen fuel can the dream of a truly clean hydrogen fuel be realized.
  • They concluded that we’d lower greenhouse gas emissions more by driving gasoline/electric hybrid cars than by driving fuel-cell cars run on hydrogen from coal. Hydrogen made using natural gas would fare a little bit better in terms of pollution output, while making it from wind power would be a slam-dunk for the environment.
  • ...4 more annotations...
  • many reasons, ranging from safety to cost to lack of demand.
  • Another problem is the lack of hydrogen refueling stations
  • replacing the fossil fuels responsible for global warming and various nagging forms of pollution.
  • they are spending upwards of $1 million to produce each one due to the advanced technology involved and low production runs. Toyota hopes to reduce its costs per fuel-cell vehicle to around $50,000 by 2015
  • smithree98 on 22 Oct 12
     
    says most things about hydrogen and what it does
smithjul98

Biodiesel.org - FAQ - 0 views

www.biodiesel.org/faqs

biofuel FAQ biodiesel

shared by smithjul98 on 15 Mar 12 - Cached
  • smithjul98 on 15 Mar 12
     
    Biodiesel (mono alkyl esters) is a cleaner-burning diesel fuel made from natural, renewable sources such as vegetable oils. Because it is renewable and domestically produced, biodiesel fits well under the Energy Policy Act of 1992, which is in place to help ensure national Energy security through replacing imported petroleum products with domestic alternative fuels.
stamperdyl98

http://ec.europa.eu/research/energy/pdf/hydrogen-report_en.pdf - 0 views

ec.europa.eu/...hydrogen-report_en.pdf

hydrogen infrastucture

shared by stamperdyl98 on 15 Mar 12 - No Cached
    • stamperdyl98
      stamperdyl98 on 15 Mar 12
       
      page 19 talks about switching to hydrogen
stamperdyl98

Environment « myFC - 0 views

www.myfuelcell.se/...environment

hydrogen environmental

shared by stamperdyl98 on 15 Mar 12 - No Cached
  • Through the use of hydrogen together with fuel cell technology it is possible to achieve a radical decrease in local pollution of carbon dioxide, nitrogen oxides and particles from the transportation sector. Although the production of hydrogen from fossil fuels affects the environment it is an advantage that the carbon dioxide emissions can be separated already on the production site. This becomes evident when hydrogen is used as vehicle fuel, avoiding pollution from every individual vehicle.The only emission from a fuel cell reacting with hydrogen is pure water. The environmental gains are high, provided that pollution in the hydrogen production process is kept low. A fuel cell is approximately twice as energy efficient as a combustion engine if used in a regular car. The effect is that, using the same amount of energy, a fuel cell car can drive twice as far as a car with a combustion engine can.
dynesbri97

Renewable Solar Energy: How is Wind Formed - 0 views

renewable-solar-energy.blogspot.com/...how-wind-is-formed.html

shared by dynesbri97 on 13 Mar 12 - No Cached
  • Wind is formed by the indirect effect of the sun on the Earth’s surface. There is a reasonable explanation why is it so. As the sun shines, the Sun heats the Earth's surface; the air near ground level gets hot and rises up. Cold air at higher altitudes replaces it. At nighttime the process is reversed. This is  in principal how is wind formed on Earth.
  • This process of hot air rising and colder air sinking, causes high and low air pressure areas and results in wind formation. The more the pressure changes in an area, the faster the wind speed will be. If two areas are close to each other, pressure difference will cause higher wind speed to be produced compared to areas that are far apart from each other. This is how the wind is formed on Earth and this phenomena is known as vertical wind formation
dpurdy

Distributed Energy Resources Guide: Fuel Cells - Cost - 3 views

www.energy.ca.gov/...cost.html

hydrogen cost

shared by dpurdy on 12 Mar 12 - No Cached
  • Price projections vary among fuel cell developers, but most are targeting costs below $1,500/kW
  • Maintenance costs of a fuel cell are expected to be comparable to that of a microturbine, ranging from $0.005-$0.010/kWh (based on an annual inspection visit to the unit).
  • At the current price, units are only used in high value, "niche" markets where reliability is premium, and in areas where electricity prices are very high and natural gas prices are low.
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