Download - 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