Recent Changes

Friday, March 16

  1. page Earth, Wind, and Fire edited ... With continuing research, wind power could potentially replace a great portion of energy used …
    ...
    With continuing research, wind power could potentially replace a great portion of energy used in the United States, especially when combined with solar and/or nuclear power
    http://www.windustry.org/how-much-do-wind-turbines-cost
    http://www.scitizen.com/cacheDirectory/HTMLcontributions/img/Bird-wind-farm.gif
    http://notocoal.weebly.com/uploads/8/3/4/2/8342315/6938199.jpg?514
    http://www.zmescience.com/wp-content/uploads/2012/01/renewable-energy-02.jpg
    http://energy.3dsoftware.net/Wind/5/u.jpg

    Drs. Rest, Donahue, and Sacks - you have a good beginning and foundation to the use of wind power as an energy source. Now we need to consider how it can be used for the general population including meeting the various needs of the consumers, the cost, and a plan for implementation in the future. Could this energy source be used with another - have you spoken with any of the other research groups?
    (view changes)
    10:16 am

Thursday, March 15

  1. comment Earth, Wind, and Fire comment reply As the technology improves and the demand grows, the materials will become less expensive and the i…
    comment reply
    As the technology improves and the demand grows, the materials will become less expensive and the investment will be better.
    9:50 am
  2. comment Earth, Wind, and Fire comment reply Yes, it reduces a company's carbon footprint.
    comment reply
    Yes, it reduces a company's carbon footprint.
    9:50 am
  3. comment Earth, Wind, and Fire comment reply Maintenance is necessary every few years. The machines are not supposed to malfunction, but when re…
    comment reply
    Maintenance is necessary every few years. The machines are not supposed to malfunction, but when repairs are needed they can be very costly.
    9:50 am
  4. comment Earth, Wind, and Fire comment reply HAWT!
    comment reply
    HAWT!
    9:50 am
  5. comment Earth, Wind, and Fire comment reply They are both common, though offshore is more popular in coastal regions and produces more energy i…
    comment reply
    They are both common, though offshore is more popular in coastal regions and produces more energy in those areas.
    9:50 am

Wednesday, March 14

  1. page Lax on Lax on Lax edited ... Anthracite - This coal is the hardest and has more carbon than the others, which gives it high…
    ...
    Anthracite - This coal is the hardest and has more carbon than the others, which gives it higher energy content.
    Lignite - This is the softest and has lower carbon levels, but it has high hydrogen and oxygen content.
    ‍‍‍‍‍‍‍‍‍Bituminous ‍‍‍‍‍‍‍‍‍-‍‍‍‍‍‍‍‍‍‍Bituminous ‍‍‍‍‍‍‍‍‍‍- This is
    There is also peat, which is the precursor to coal. It is still found in many countries and is also used as an energy source.
    The earliest known use of coal was in China. The Fu-shun mine in northeastern region of China was used to smelt copper as early as 3,000 years ago.
    ...
    Petroleum, or oil, is a fossil fuel made from the remains of animals and plants from millions of years ago. Because of these origins, oil is nonrenewable, there isn't an unlimited amount of it. In time, the earth will run out.
    It was formed more than 300 million years ago. Scientists think that tiny diatoms are the source of oil (diatoms are sea creatures, the size of a pin head, that can convert sunlight directly into stored energy).
    ‍‍‍‍‍‍‍‍‍Oil‍‍‍‍‍‍‍‍‍‍Oil has been
    ...
    provide light also‍‍‍‍‍‍‍‍‍.also‍‍‍‍‍‍‍‍‍‍.
    Native Americans used oil as medicine and to make canoes water-proof. They also taught George Washington's troops how to treat frostbite with oil.
    Petroleum oil began to replace whale oil in lamps. Whale oil cost was very high.
    ...
    World War I: Oil was highly valued by the world’s major powers and was used to contribute to oil-powered naval ships, horseless vehicles such as trucks and tanks, and military airplanes.
    Oil making a global expansion. Oil helped contribute to plastics, synthetics, and other industries. But with these benefits, came the awareness of environmental damage and the risks in working with oil.
    ...
    states being ‍‍‍‍‍‍‍‍‍‍‍‍Iran,‍‍‍‍‍‍‍‍‍‍‍‍‍Iran, Iraq, Kuwait,
    ...
    Arabia, and Venezuela‍‍‍‍‍‍‍‍‍‍‍‍.Venezuela‍‍‍‍‍‍‍‍‍‍‍‍‍. OPEC is
    1973: OPEC declares and oil embargo against all countries that supported Israel in the Yom Kippur War. This included the United States, and as oil prices rose up, the country suffered the worst recession since World War II.
    1989: Oil tanker Exxon Valdez pierced in Southern Alaska and it dumped 39,000 tons of oil.
    -Oil can be found in many different ways including oil sand and it can also be pumped out of parts of the ocean like the gulf of mexico
    -‍‍‍‍‍‍‍‍‍‍‍Oil-‍‍‍‍‍‍‍‍‍‍‍‍Oil accounts for
    ...
    the United States‍‍‍‍‍‍‍‍‍‍‍States‍‍‍‍‍‍‍‍‍‍‍‍
    -Oil is converted to energy in three primary ways
    -Conventional Steam: Oil is burned to heat water creating steam and electricity
    ...
    -It is a dirty energy source
    -It can harm the environment when it is extracted
    -‍‍It-‍‍‍It can cause Oil spills‍‍spills‍‍‍
    -Oil and Coal are both nonrenewable
    -Burning oil releases carbon dioxide which is harmful to the environment
    ...
    Dr. Deratzou, like many others, I do believe the oil industry is heading in the wrong direction. It doesn't have a bright future, BUT, there is still hope: Russia has the longest coast line in the world. Many believe it to be worthless because it is covered in ice. However, as a result of global warming, it is beginning to melt. This region, being the Arctic, is said to hold one fifth of the world's undiscovered oil. Despite severe weather in this region, the Russians are already on top of this discovery and have sent icebreakers north. I don't know what to make of this yet, but it could be beneficial for the United States. I provided a link below containing information on this story.
    http://www.nytimes.com/2011/02/16/business/global/16arctic.html?pagewanted=all
    ...
    are numerous ‍‍‍‍‍‍‍‍‍new‍‍‍‍‍‍‍‍‍‍new resources ‍‍‍‍‍‍‍‍‍of‍‍‍‍‍‍‍‍‍‍of oil and
    One problem with oil and coal use in the future is the dnger of pollution. Oil and Coal both pollute the environment when they are burned, and this creates a problem because our earth is already badly polluted as it is and pollution causes problems like global warming. Another problem is there is no good way to reduce the emissions produced by coal and oil, so it is a good and reliable energy source but it isn't clean and is bad for the environment
    An agreement with Canada was recently denied by President Obama due to the damage it could do the environment, but i think as time goes on the US will have to utilize these large oil reserves in Canada as the supply of oil gets lower and lower
    (view changes)
    8:08 pm
  2. comment Lax on Lax on Lax comment reply is the Bituminous coal the type of coal that is used the most?
    comment reply
    is the Bituminous coal the type of coal that is used the most?
    8:08 pm
  3. page Earth, Wind, and Fire edited ... Earth, Wind and Fire Great name for your group. There is a lot of potential for the use of wi…
    ...
    Earth, Wind and Fire
    Great name for your group. There is a lot of potential for the use of wind energy and many people are looking into it. As we go, I'll write my comments in red.
    ‍‍‍‍History ‍‍‍‍‍‍‍‍‍History ‍‍‍‍‍
    http://telosnet.com/wind/early.html
    -The history of wind as a source of energy began in 1000 B.C., to 1300 A.D. for the use of simple machines. The earliest known source of wind was for sailboats, which later led to the later sail-type windmills. The first windmills were invented to do the tasks of grain-grinding and water-pumping in Persia 500 - 900 A.D. Vertical-axis windmills were of the first windmills to be created which consisted to vertical sails connected to vertical shafts. The vertical-axis windmills were also used in China which some say is their origin because they appear and are documented as early as 1219 A.D.
    Windmills began to appear in the western world in 1300 A.D., to 1875 A.D. howerer these windmills appeared on a horizontal axis because European water wheels were on a horizontal axis. The reason for the shift was unknown but the horizontal shift began to become more common. In 1270 A.D. the first illustration was drawn as a four blad mill mounted on a post, gain the name, "postmill" which for their time was technologically advanced. In 1390 A.D., the dutch refined the towermill which was essentially the postmill. the towermill was a multi-story windmill with multiple floors dedicated to grinding grain, storing grain and removing chaff. On the very bottom were living quaters for the windsmith and their family. These windmills gave room for improvemnt because they had to be managed manually, the windsmith's primary job. The European mills later became that improvent for the primary reason that the sails generated aerodynamic lift which improved the rotator efficiency. This feature allowed an increase in rotator speed which then allowed for a greater amount of grinding and pumping. Perfecting the windmill took place in increments over the duration of 500 years. When the process was finally complete the windmills had all of the major features to be recognized in the performance of modern wind turbine blades. These mills were the, "electrical motor" of pre-industrial Europe and had a diversity ranging from irrigation, grain-grinding, saw-milling of timber and the more common waterfall. They also processed spices, dyes, paint and cocoa. These large tower mills began to decline with the use and appearance of steam engines.
    ...
    United States; ‍‍their‍‍‍their primary use
    ...
    no close rivers.‍‍rivers.‍‍‍
    {postmill.jpg} {dutch2.jpg}
    An early persian vertical A dutch windmill.
    ...
    When the wind blows across teh rotor blades, the propeller shaft rotates the alternator and the alternator makes electricity
    If wind speed is reduced by 1/2, power is reduced by 1/8 (Light wind = almost no power)
    ‍Offshore‍‍Offshore wind power‍power‍‍
    Wind power from the sea
    Cheaper and more stable
    ...
    Does not pollute the environment
    It's renewable! (the supply of wind is unlimited)
    ‍‍‍Prices‍‍‍‍Prices for harnessing
    ...
    the 1960s ‍‍‍‍‍‍‍
    Decent availability (some places are better suited than others)
    Cons
    ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍Wind‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍Wind is unpredictable‍‍‍‍‍‍‍‍‍
    ‍‍‍‍‍‍‍‍‍
    unpredictable‍‍‍‍‍‍‍‍‍‍
    ‍‍‍‍‍‍‍‍‍‍
    {us_windmap_80meters_820w.jpg} ‍‍
    ExpensesKills birds
    Cost effectiveness
    Repair Costs‍Repair Costs‍
    Noise and aesthetics
    http://energyinformative.org/wind-energy-pros-and-cons/
    ...
    Economics
    Wind power has low ongoing costs, but a moderate capital cost. The average cost per unit incorporates the cost of construction of the turbine and transmission facilities, borrowed funds, return to investors and estimated annual production, averaged over the projected life of the equipment, which may be in excess of twenty years. Energy cost estimates are very dependent on these assumptions so published cost figures can differ substantially.
    ...
    most expensive. ‍‍In‍‍‍In 2011 wind
    ...
    the most expensive‍‍.expensive‍‍‍. People who
    Secondary market forces also provide incentives for businesses to use wind-generated power, even if there is a premium price for electricity. Some manufactures for example pay utility companies a premium that goes to subsidize and build new wind power infrastructure. Companies use wind-generated power, and in return they can claim that they are undertaking strong "green" efforts. In the US the organization Green-e monitors business compliance with these renewable energy credits
    Is‍Is Wind Energy Practical?
    ‍‍Grid-connected systems‍‍
    Practical?‍
    ‍‍‍Grid-connected systems‍‍‍

    Connect smaller wind turbines
    If not enough energy is produced, the utility makes up the difference
    ...
    Still expensive
    A 10 kilowatt machine (the size needed to power an average home) might cost $35,000-$50,000
    ‍Commercial‍‍Commercial machines can
    ...
    to $3.5 million‍million‍‍
    Then why?
    Though it is not as effective as it could be right now, wind power is still an alternative energy source
    (view changes)
    8:04 pm
  4. comment Earth, Wind, and Fire comment added Which type of turbine is used more often?
    comment added
    Which type of turbine is used more often?
    8:04 pm

More