Εργασία Group 11

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    Group 11

    2010-2011

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    World energy resources andconsumption

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    As years go by , it becomes more and more

    apparent that is necessary to focus on other forms

    of energy because total worldwide energyconsumption is basically derived from the

    combustion of fossils fuels. Those forms are the

    nuclear and renewable energy. Thisshould be

    done due to the depletion ofsources of fossilsfuels and environmental pollution.

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    Fossils fuels

    Fossil f ls, coal, oil a at ral gas, ar a on-r newa lesourceofenergy.For ed from lants andanimals t at livedup to 300 million years ago, fossil

    fuels

    are found indeposits eneat t eeart

    .T efuels are urned to release t e c emical energy t at

    isstoredwit in t is resource. Energy isessential tomodernsociety aswe know it.

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    Over 85% ofour energy demands aremet y t e combustionof fossil fuels.

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    History of using fossils fuelsIn t e late 1800's, coal and gaswereused as eat and lig t sources,steam locomotives aswell. T erewereearly automobiles too, butt ese vehiclesweremoreof a novelty than a way of life.It wasn't

    until the 1940'sdid things change.

    W

    hy the 1940's?

    The ans

    wer is

    that engineers

    and inventorshadgovernment support andextra incentive todevelop fossil fuel

    technologies, war.WorldWar IIwas the catalyst andnot WorldWar Ibecause 'TheWar to End All Wars' was fought by men in trenches

    andmechanizedwarfarehadonly beendeveloped late in theconflict. Germanengineersenabled this, andwaseventually

    counteredby Allied technological advancements.From thenon,

    usage anddevelopment of fo

    ssil fuel

    ssteadily ro

    se.

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    Nuclear Energy

    Energy created in a nuclear reaction is callednuclearenergy, or atomic energy.

    Nuclear energy isproducednaturally and inman-madeoperationsunder human control.

    Naturally: Somenuclear energy isproducednaturally.

    Man-Made: Nuclear energy canbeman-made too.

    Machines

    callednuclear reactors, partsofnuclearpower plants, provideelectricity for many cities.

    Nuclear energy isproduced in twodifferent ways, inone,largenuclei aresplit to releaseenergy.In theothermethod, small nuclei are combined to releaseenergy.

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    Nuclear energy station

    Nuclear fission

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    The future ofNuclear Energy

    Somepeople think that nuclear energy ishere tostay

    andwemust learn to livewith it.Otherssay that we

    should get ridof all nuclear weapons andpower

    plants. Bothsideshave their cases as there areadvantages anddisadvantages tonuclear energy.Still

    othershaveopinions that fall somewhere in

    between.

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    Renewable energy

    Renewableenergy resources, such aswind, solar and

    hydropower, offer clean alternatives to fossil fuels.

    They produce littleor nopollutionor greenhouse

    gases, and they will never runout.

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    Solar Energy

    Thesun isour most powerful sourceofenergy.

    Sunlight, or solar energy, canbeused for heating,

    lighting and cooling homes andother buildings,

    generating electricity, water heating, and a variety of

    industrial processes.

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    Wind Energy

    Theenergy of thewindhasbeenused for centuries

    tosail ships anddrivewindmills that grind grain.

    Today, windenergy is capturedby wind turbines and

    used to generateelectricity.

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    Hydropower

    Flowing water canbeused topower water wheels

    that drivemechanical processes. And capturedby

    turbines and generators, like thosehoused at many

    dams around theworld, theenergy of flowing watercanbeused to generateelectricity.

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    Biomass Energy

    Biomassenergy includewood, organic components

    from agricultural, forestry municipal and industrial

    wastes. Biomass canbeused toproduceelectricity

    and as fuel for transportation, or tomanufacture

    products.

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    Geothermal Energy

    Geothermal energy canbedrawn fromdeep

    underground reservoirsby drilling, or fromother

    geothermal reservoirs closer to thesurface that

    canbeused topower generators andproduce

    electricity, or for other applicationssuch ashome

    heating andpower generation for industry

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    In conclusion, tomakesurewehaveplenty ofenergy

    in the future, it'sup to all ofus touseenergy wisely.

    Wemust all conserveenergy anduse it efficiently.

    It's alsoup to thosewhowill create thenewenergytechnologiesof the future. The future isours, but we

    needenergy to get there.

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    References

    http://en.wikipedia.org/wiki/World_energy_resources_and_consumption

    http://environment.about.com/od/renewable

    energy/tp/renew_energy.htm

    http://library.thinkquest.org/3471/nuclear_energy.html

    http://www-formal.stanford.edu/jmc/progress/nuclear-faq.html