Recent Changes

Tuesday, December 6

  1. page Wind - AH edited Wind Farmers Wind is a form of solar energy. Winds are caused by the uneven heating of the atmos…
    FarmersWind is a form of solar energy. Winds are caused by the uneven heating of the atmosphere. Farmers have been
    The model G.E. makes costs 1.5 million dollars, 2 million installed
    pros and cons
    A Renewable Non-Polluting Resource
    -Wind energy is a free, renewable resource, so no matter how much is used today, there will still be the same supply in the future.
    Cost Issues
    -Even though the cost of wind power has decreased in the past 10 years, the technology requires a higher initial investment than a fossil-fueled generators.
    Environmental Concerns
    -Although wind power plants have relatively little impact on the environment compared to fossil fuel power plants, there is some concern over the noise produced by the rotor blades.
    Supply and Transport Issues
    -The major challenge to using wind as a source of power is that it is intermittent and does not always blow when electricity is needed.

    (view changes)
    9:26 am
  2. file ge.jpg uploaded
    9:25 am

Monday, December 5

  1. page Wind - AH edited Wind Farmers have been using wind energy for many years to pump water from wells using windmills.…
    Farmers have been using wind energy for many years to pump water from wells using windmills. Wind is also used to turn large grinding stones to grind wheat or corn. Today, the wind is also used to make electricity.

    (view changes)
    1:09 pm
  2. file chap16_2.jpg uploaded
    1:06 pm

Friday, December 2

  1. page OTEC - KS edited ... kW for a penny = 800 over ten years = 80,000 revenue hours. If it was 2 cents for kWh it woul…
    kW for a penny = 800 over ten years = 80,000 revenue hours.
    If it was 2 cents for kWh it would make the cost be around $1,600
    the satellites ifit would be
    (view changes)
    12:30 pm
  2. page Hydrogen - KS edited Hydrogen - {hydrogen-fuel-cell-1.jpg} {images.jpg} What is Hydrogen? Hydrogen is a simple at…
    Hydrogen -
    {hydrogen-fuel-cell-1.jpg} {images.jpg}
    What is Hydrogen? Hydrogen is a simple atom that is made up of one proton and one electron. Its has almost an endless supply but doesn't occur naturally like gas on earth it has to be combined with other elements. It is an odorless, colorless and highly flammable gas.
    What is a hydrogen fuel cell? It's like a battery sort of device, it combines hydrogen and oxygen to produce electricity, heat, and water. It changes the energy produced by a chemical reaction into usable electric power. Negative part about a fuel cell is that it only lasts as long as it is fueled by hydrogen, never losing its charge.
    How does a hydrogen fuel cell work? They are made up of three major segments, which are sandwiched together: the anode, the electrolyte, and the cathode.Two different chemical reactions occur at the interfaces, a place where two parts of the object connect or interact with one another. From the reactions that the chemical makes fuel is made, water or carbon dioxide is created, and an electric current is produced, which can be used to power electrical devices like fuel cells and this is normally called the load. The most important designs for the fuel cell to be functional is 1. The electrolyte substance. 2. The fuel that is used to work the object which is hydrogen but others can be used. 3. The anode catalyst, which is used to break down the fuel so that it separates into electrons and ions. 4. The cathode catalyst, which is used to turn the ions into waste chemicals like water or carbon dioxide.
    Advantages -
    Its leagues and leagues are less complicated than a conventional gas or diesel engine.
    Does not reach high temperatures, corrosion does not occur and or no structural weaknesses found in other engines.
    Very flammable gas.
    The hydrogen tank could be currently too large for the car according to the on-board storage.
    it in.
    How much would it cost? If it were to be produce in large quantities and widely distributed like gasoline, the cost of it would be equivalent to $2 per gallon or less. Fuel cells are estimated to be three times more efficient as gas engines which in result means better mileage. Hydrogen fuel cells are quite expensive to produce and some are fragile. Its about $300,000 per car. While many designs require rare substances such as platinum as a catalyst in order to work to its full capability. Although they have done research and made some advancements to develop a new nickel-tin nano-metal catalyst which lowers the cost by a bunch
    (view changes)
    9:15 am
  3. file images.jpg uploaded
    9:14 am
  4. page Biomass - CE edited ... {biomass-fuel-production-process.jpg}…
    What is it? Renewable energy from plants and animals
    How do we use it? fuel, electricity, biobased products
    What are the different types of it? Landfill gas, wood, crops, and garbage
    Where is it most used or most effective? Fuel
    What are some advantages to this source? cheap, renewable, easy to convert
    x----What are some disadvantages to this source? Must have geothermal energy close by, not always reliable, there may be geothermal gasesWhat are some disadvantages to this source? greenhouse gas, more energy, and biomass crops are not always available
    What is the cost for a small scale (house) or large scale (city) operation?

    (view changes)
    7:51 am