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potterzac97

Solar vehicle - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Solar-charged_vehicle

potential solar

shared by potterzac97 on 15 Mar 12 - No Cached
  • Power density: Power from a solar array is limited by the size of the vehicle and area that can be exposed to sunlight. While energy can be accumulated in batteries to lower peak demand on the array and provide operation in sunless conditions, the battery adds weight and cost to the vehicle. The power limit can be mitigated by use of conventional electric cars supplied by solar (or other) power, recharging from the electrical grid.
bureaumar98

Home - BioFuel Information - 0 views

biofuel.org.uk

biofuels what how future

shared by bureaumar98 on 15 Mar 12 - No Cached
  • The most important advantage of using liquid as fuel is that they can be easily pumped and can also be handled easily.
  • Biofuels are the best way of reducing the emission of the greenhouse gases.
  • Some of the major producers and users of biogases are Asia, Europe and America. Theoretically, biofuel can be easily produced through any carbon source; making the photosynthetic plants the most commonly used material for production. Almost all types of materials derived from the plants are used for manufacturing biogas. One of the greatest problems that is being faced by the researchers in the field is how to covert the biomass energy into the liquid fuel
efana1

Wind turbines and migratory birds: A serious problem? - 0 views

thesouthern.com/...db-5273-8510-673a6eb3e401.html

disadvantages wind

shared by efana1 on 15 Mar 12 - No Cached
  • Wind turbines are responsible for the deaths of between 10,000 and 40,000 birds each year, according to the American Bird Conservancy.
  • the Altamont Pass site kills the largest number of birds - about 4,700 each year
  • The American Wind Energy Association contends wind turbines are far less lethal to birds than other man-made structures, such as windows (responsible for more than 100 million deaths each year in the U.S.) and power lines (between 130 million and 174 million), or than cats, which remain the number one bird killer.
  • ...1 more annotation...
  • bat deaths associated with turbines were three times that of the rate of birds, especially during their migratory season
stamperdyl98

Fossil Fuel Alternatives for Cars | eHow.com - 0 views

www.ehow.com/il-fuel-alternatives-cars.html

hydrogen cost sustainable

shared by stamperdyl98 on 15 Mar 12 - No Cached
  • Hydrogen Hydrogen can be produced domestically through electrolysis (the process of splitting the hydrogen and oxygen particles apart in a water molecule). When used in automobiles, a hydrogen-powered car will emit only water vapor from its tailpipe. Hydrogen vehicles use fuel cells as their source of power, and currently this technology is too expensive for most consumers. If the costs of fuel cell technology and hydrogen production can decrease, hydrogen may become one of the most environmentally friendly and sustainable sources of energy available.
crandallchr98

Hydrogen Fuel Cells - Disadvantages - 0 views

www.columbia.edu/...h-fuel-cell-disadv.html

cells fuel disadvantages what hydrogen cost how potential

shared by crandallchr98 on 15 Mar 12 - No Cached
  • Fuel cells are currently very expensive, but since they have a simple construction, mass production costs would become extremely low. 
  • Prototype fuel cells last only 1/5th as long as would be needed to make fuel cells cost-effective.
  • They are energy losers because it costs more to produce hydrogen than is earned by using hydrogen in fuel cells:  Electricity generated by fuel cells in cars costs thousands of dollars per kilowatt:  This would have to fall by a factor of 10 for fuel cells to become economically viable.
dpurdy

First Solar to build new solar plant for NRG | Reuters - 0 views

www.reuters.com/...rstsolar-idUSBRE82B0N520120312

solar future

shared by dpurdy on 12 Mar 12 - No Cached
  • t is expected to be completed by the end of 2012, and will sell its output to UniSource Energy Corp's Tucson Electric Power under a 20-year contract
stewartlia99

Wind Turbines Impact - 2 views

www.clean-energy-ideas.com/...wind_turbines_impact.html

wind pollution noise visual

shared by stewartlia99 on 13 Mar 12 - No Cached
  • The most noticeable impact a wind turbine places upon the environment is noise pollution.
  • This is down to the noise, and many people compare the sound output of a wind turbine to a small jet engine.
  • Another disadvantage regarding a wind turbine and it's impact on the surrounding environment can be expressed with the term "visual impact" or "visual pollution".
  • ...1 more annotation...
  • Some people believe wind turbines actually look quite nice, yet many people disagree.
bureaumar98

Biofuels - Solid, liquid, or gas fuels made from biomass - 0 views

www.alternative-energy-news.info/...biofuels

biofuels what

shared by bureaumar98 on 13 Mar 12 - Cached
  • Biofuels are produced from living organisms or from metabolic by-products (organic or food waste products). In order to be considered a biofuel the fuel must contain over 80 percent renewable materials
bartontri97

New Hope for Hydrogen Storage - 0 views

www.alternative-energy-news.info/new-hope-for-hydrogen-storage

hydrogen

shared by bartontri97 on 13 Mar 12 - Cached
  • It is plenty in nature although it doesn’t occur freely but in association with other compounds.
  • It does not produce greenhouse gases that are damaging to the surroundings.
osikatho97

Biofuels, Biodiesel and Ethanol - The New York Times - 0 views

topics.nytimes.com/...index.html

new york times biofuels biodiesel

shared by osikatho97 on 13 Mar 12 - No Cached
  • In the early days of motorized transport, fuels derived from plants lost out to fuels refined from crude oil
  • first-generation biofuels -- chiefly, ethanol made from corn or sugar cane, or biodiesel made from vegetable oil
  • The source plants absorb carbon dioxide from the air as they are growing, and consequently, the carbon dioxide that is released when biofuels are burned does not represent a net addition of that greenhouse gas to the atmosphere.
  • ...1 more annotation...
  • second-generation biofuels made from plant wastes
smithree98

Fuel Cell Advantages and Disadvantages - 1 views

www.futurecars.com/...hydrogen_fuellcell_cars2.html

hydrogen fuel benefit advantages disadvantages cell

shared by smithree98 on 19 Mar 12 - No Cached
  • Conceptually, replacing the current oil-based infrastructure with hydrogen would cost billions, maybe trillions, of dollars. Although abundant in the universe, hydrogen is fairly rare in our atmosphere, meaning that it has to be extracted (for example through electrolysis, as explained above) and currently, the process is cost prohibitive and inefficient. Its production at energy plants creates excessive carbon dioxide. When it burns, a hydrogen flame is virtually invisible; coupled with the gas’s propensity for escaping, in small amounts, almost any tank, there are concerns about explosions. On the plus side, hydrogen is so light it typically is dispersed in the air very quickly. On-board storage is a major issue; a hydrogen tank would currently be too large for a car. It is a very flammable gas (think of the Hindenburg), which further adds to the on-board storage problems.
  • smithree98 on 24 Oct 12
     
    advantages and disadvantages of hydrogen fuel cells
dpurdy

The Hidden Cost of Fossil Fuels | Union of Concerned Scientists - 2 views

www.ucsusa.org/...the-hidden-cost-of-fossil.html

Fossil fuels pollution

shared by dpurdy on 19 Mar 12 - Cached
  • Fossil fuels—coal, oil, and natural gas—are America's primary source of energy, accounting for 85 percent of current US fuel use.
  • Many of the environmental problems our country faces today result from our fossil fuel dependence. These impacts include global warming, air quality deterioration, oil spills, and acid rain.
  • Over the last 150 years, burning fossil fuels has resulted in more than a 25 percent increase in the amount of carbon dioxide in our atmosphere.
  • ...8 more annotations...
  • limate scientists predict that if carbon dioxide levels continue to increase, the planet will become warmer in the next century.
  • Several important pollutants are produced by fossil fuel combustion: carbon monoxide, nitrogen oxides, sulfur oxides, and hydrocarbons. In addition, total suspended particulates contribute to air pollution, and nitrogen oxides and hydrocarbons can combine in the atmosphere to form tropospheric ozone, the major constituent of smog.
  • Finally, fossil fuel use also produces particulates, including dust, soot, smoke, and other suspended matter, which are respiratory irritants.
  • Oil spills, for example, leave waterways and their surrounding shores uninhabitable for some time.
  • Production, transportation, and use of oil can cause water pollution.
  • Sulfur oxides are produced by the oxidization of the available sulfur in a fuel. Utilities that use coal to generate electricity produce two-thirds of the nation's sulfur dioxide emissions. Nitrogen oxides and sulfur oxides are important constituents of acid rain
  • Hydrocarbons are emitted from human-made sources such as auto and truck exhaust, evaporation of gasoline and solvents, and petroleum refining.
  • Two oxides of nitrogen--nitrogen dioxide and nitric oxide--are formed in combustion. Nitrogen oxides appear as yellowish-brown clouds over many city skylines
  • dpurdy on 19 Mar 12
     
    The article we read in class. Use the summary we wrote or refer to this.
dpurdy

Hydrogen cars ready to roll - for a price - US news - Environment - Green Machines - msnbc.com - 0 views

www.msnbc.msn.com/...hydrogen-cars-ready-roll-price

hydrogen cost

shared by dpurdy on 21 Mar 12 - No Cached
  • The cost varies too, from $1 to $20 a kilo. A gallon of gasoline has the same energy content as a kilo of hydrogen, but vehicles using the latter get two to three times higher mileage.
dpurdy

Fuel Cells 2000 : Hydrogen : Basics - 1 views

www.fuelcells.org/...basics.html

Hydrogen cost

shared by dpurdy on 03 Nov 11 - Cached
  • How much will Hydrogen fuel cost? The U.S. Department of Energy's Hydrogen, Fuel Cells & Infrastructure Technologies Program is working to achieve the following goals: By 2005, the technology will be available to produce hydrogen at the pump for $3.00 per gallon gasoline equivalent, and DOE wants to validate this technology by 2008.  By 2010, the price goal is $1.50 per gallon of gasoline equivalent (untaxed) at the station. Even $3 a gallon would save most of us money, since FCVs will be two to three times more efficient than internal combustion engine (ICE) vehicles.  If all the goals are met, FCVs offer the promise of Energy at $1 a gallon - or less! 
gaworeckilog99

Cheap fuel cells real soon? - Democratic Underground - 0 views

www.democraticunderground.com/10023006104

fuel cell sustainable

shared by gaworeckilog99 on 20 Sep 13 - No Cached
  • Scientists have come up with a more efficient way to split ocean water and turn it into sustainable, clean hydrogen fuel. They created a flexible plastic film that acts as the catalyst to begin splitting ocean water, without requiring the high energy input that current methods need.
gonzalezisa00

Science of Summer: How Do Ocean Waves Form? | LiveScience - 0 views

www.livescience.com/1-how-do-ocean-waves-form.html

wave form

shared by gonzalezisa00 on 20 Sep 13 - No Cached
  • Presnell explained that wind speed and duration help in determining the size and frequency of ocean waves. Another factor is called "fetch," referring to the span of water over which a breeze blows, and the longer a fetch, the more energy a wave can build up.
bondycal00

Solar power - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/Solar_power

solar pollution cost co2 sustainable convert history form current

shared by bondycal00 on 20 Sep 13 - Cached
  • The Life-cycle greenhouse-gas emissions of solar power are in the range of 22 to 46  g/kWh depending on if solar thermal or solar PV is being analyzed, respectively. With this potentially being decreased to 15 g/kWh in the future.[71] For comparison (of weighted averages), a combined cycle gas-fired power plant emits some 400-599 g/kWh,
  • bondycal00 on 26 Sep 13
     
    Solar power is the conversion of sunlight into electricity, either directly using photovoltaics (PV), or indirectly using concentrated solar power (CSP). Concentrated solar power systems use lenses or mirrors and tracking systems to focus a large area of sunlight into a small beam. Photovoltaics convert light into electric current using the photoelectric effect.
sopranodan99

What Causes Ocean Waves? - EnchantedLearning.com - 0 views

www.enchantedlearning.com/...Waves.shtml

wave form

shared by sopranodan99 on 20 Sep 13 - Cached
  • The winds cause waves on the surface of the ocean (and on lakes). The wind transfers some of its energy to the water, through friction between the air molecules and the water molecules. Stronger winds (like storm surges) cause larger waves.
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